diff --git a/ChangeLog b/ChangeLog
index 15cb3194..80ce3618 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2017-04-11  Markus Gans  <guru.mail@muenster.de>
 	* Remove Cygwin bold color quirks fix in FOptiAttr
+	* Added unit test for FOptiAttr
 
 2017-04-08  Markus Gans  <guru.mail@muenster.de>
 	* Improved Linux terminal quirks
diff --git a/src/test/foptiattr-test.cpp b/src/test/foptiattr-test.cpp
index 590d89ee..ebf22415 100644
--- a/src/test/foptiattr-test.cpp
+++ b/src/test/foptiattr-test.cpp
@@ -74,6 +74,10 @@ class FOptiAttrTest : public CPPUNIT_NS::TestFixture
     void vt100Test();
     void xtermTest();
     void rxvtTest();
+    void linuxTest();
+    void cygwinTest();
+    void puttyTest();
+    void teratermTest();
 
   private:
     std::string printSequence (char*);
@@ -89,6 +93,10 @@ class FOptiAttrTest : public CPPUNIT_NS::TestFixture
     CPPUNIT_TEST (vt100Test);
     CPPUNIT_TEST (xtermTest);
     CPPUNIT_TEST (rxvtTest);
+    CPPUNIT_TEST (linuxTest);
+    CPPUNIT_TEST (cygwinTest);
+    CPPUNIT_TEST (puttyTest);
+    CPPUNIT_TEST (teratermTest);
 
     // End of test suite definition
     CPPUNIT_TEST_SUITE_END();
@@ -156,7 +164,6 @@ void FOptiAttrTest::ansiTest()
 
   FOptiAttr oa;
   oa.setDefaultColorSupport();  // ANSI default color
-//oa.setCygwinTerminal();       // Cygwin bold color fix
   oa.setNoColorVideo (3);       // Advid standout (1) + underline mode (2)
   oa.setMaxColor (8);
   oa.set_enter_bold_mode (C_STR(CSI "1m"));
@@ -624,7 +631,6 @@ void FOptiAttrTest::vt100Test()
 
   FOptiAttr oa;
 //oa.setDefaultColorSupport();  // ANSI default color
-//oa.setCygwinTerminal();       // Cygwin bold color fix
   oa.setNoColorVideo (0);
   oa.setMaxColor (1);
   oa.set_enter_bold_mode (C_STR(CSI "1m$<2>"));
@@ -1100,7 +1106,6 @@ void FOptiAttrTest::xtermTest()
 
   FOptiAttr oa;
   oa.setDefaultColorSupport();  // ANSI default color
-//oa.setCygwinTerminal();       // Cygwin bold color fix
   oa.setNoColorVideo (0);
   oa.setMaxColor (256);
   oa.set_enter_bold_mode (C_STR(CSI "1m"));
@@ -1582,7 +1587,6 @@ void FOptiAttrTest::rxvtTest()
 
   FOptiAttr oa;
   oa.setDefaultColorSupport();  // ANSI default color
-//oa.setCygwinTerminal();       // Cygwin bold color fix
   oa.setNoColorVideo (0);
   oa.setMaxColor (8);
   oa.set_enter_bold_mode (C_STR(CSI "1m"));
@@ -2048,6 +2052,1431 @@ void FOptiAttrTest::rxvtTest()
   delete from;
 }
 
+//----------------------------------------------------------------------
+void FOptiAttrTest::linuxTest()
+{
+  // Simulate a Linux terminal with 16 colors
+
+  FOptiAttr oa;
+  oa.setDefaultColorSupport();  // ANSI default color
+  oa.setNoColorVideo (18);
+  oa.setMaxColor (16);
+  oa.set_enter_bold_mode (C_STR(CSI "1m"));
+  oa.set_exit_bold_mode (C_STR(CSI "22m"));
+  oa.set_enter_dim_mode (0);
+  oa.set_exit_dim_mode (0);
+  oa.set_enter_italics_mode (0);
+  oa.set_exit_italics_mode (0);
+  oa.set_enter_underline_mode (0);
+  oa.set_exit_underline_mode (0);
+  oa.set_enter_blink_mode (C_STR(CSI "5m"));
+  oa.set_exit_blink_mode (C_STR(CSI "25m"));
+  oa.set_enter_reverse_mode (C_STR(CSI "7m"));
+  oa.set_exit_reverse_mode (C_STR(CSI "27m"));
+  oa.set_enter_standout_mode (C_STR(CSI "7m"));
+  oa.set_exit_standout_mode (C_STR(CSI "27m"));
+  oa.set_enter_secure_mode (0);
+  oa.set_exit_secure_mode (0);
+  oa.set_enter_protected_mode (0);
+  oa.set_exit_protected_mode (0);
+  oa.set_enter_crossed_out_mode (0);
+  oa.set_exit_crossed_out_mode (0);
+  oa.set_enter_dbl_underline_mode (0);
+  oa.set_exit_dbl_underline_mode (0);
+  oa.set_set_attributes (C_STR(CSI "0"
+                               "%?%p6%|%t;1%;"
+                               "%?%p1%p3%|%t;7%;"
+                               "%?%p4%t;5%;m"
+                               "%?%p9%t\016%e\017%;"));
+  oa.set_exit_attribute_mode (C_STR(CSI "0m\017"));
+  oa.set_enter_alt_charset_mode (C_STR("\016"));
+  oa.set_exit_alt_charset_mode (C_STR("\017"));
+  oa.set_enter_pc_charset_mode (C_STR(CSI "11m"));
+  oa.set_exit_pc_charset_mode (C_STR(CSI "10m"));
+  oa.set_a_foreground_color (C_STR(CSI "3%p1%{8}%m%d"
+                                   "%?%p1%{7}%>%t;1%e;22%;m"));
+  oa.set_a_background_color (C_STR(CSI "4%p1%{8}%m%d"
+                                   "%?%p1%{7}%>%t;5%e;25%;m"));
+  oa.set_foreground_color (0);
+  oa.set_background_color (0);
+  oa.set_term_color_pair (0);
+  oa.set_orig_pair (C_STR(CSI "39;49;25m"));
+  oa.set_orig_orig_colors (C_STR(OSC "R"));
+  oa.initialize();
+
+  FOptiAttr::char_data* from = new FOptiAttr::char_data();
+  FOptiAttr::char_data* to = new FOptiAttr::char_data();
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default color + bold
+  from->fg_color = fc::Default;
+  from->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blue text on white background + dim + italic
+  to->fg_color = fc::Blue;
+  to->bg_color = fc::White;
+  to->attr.bit.dim = true;
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017" CSI "34;22m" CSI "47;5m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reset attributes + default background
+  to->attr.bit.bold = false;
+  to->attr.bit.dim = false;
+  to->attr.bit.italic = false;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "34;22m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Red text on black background
+  to->fg_color = fc::Red;
+  to->bg_color = fc::Black;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "31;22m" CSI "40;25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // 256 color text and background
+  to->fg_color = fc::SpringGreen3;
+  to->bg_color = fc::NavyBlue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "32;1m" CSI "44;25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold on (with default colors)
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off (with default colors)
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim on (with default colors)
+  to->attr.bit.dim = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off (with default colors)
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic on (with default colors)
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off (with default colors)
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline on (with default colors)
+  to->attr.bit.underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off (with default colors)
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink on (with default colors)
+  to->attr.bit.blink = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;5m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink off (with default colors)
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse on (with default colors)
+  to->attr.bit.reverse = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;7m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off (with default colors)
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout on (with default colors)
+  to->attr.bit.standout = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;7m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off (with default colors)
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible on (with default colors)
+  to->attr.bit.invisible = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT ( to->code == ' ' );
+  from->code = ' ';
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off (with default colors)
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\17") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect on (with default colors)
+  to->attr.bit.protect = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off (with default colors)
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out on (with default colors)
+  to->attr.bit.crossed_out = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off (with default colors)
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline on (with default colors)
+  to->attr.bit.dbl_underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off (with default colors)
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set on (with default colors)
+  to->attr.bit.alt_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\016") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off (with default colors)
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017" CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set on (with default colors)
+  to->attr.bit.pc_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "11m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off (with default colors)
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "10m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Turn on all attributes (with default colors)
+  to->attr.bit.pc_charset    = true;
+  to->attr.bit.bold          = true;
+  to->attr.bit.dim           = true;
+  to->attr.bit.italic        = true;
+  to->attr.bit.underline     = true;
+  to->attr.bit.blink         = true;
+  to->attr.bit.reverse       = true;
+  to->attr.bit.standout      = true;
+  to->attr.bit.invisible     = true;
+  to->attr.bit.protect       = true;
+  to->attr.bit.crossed_out   = true;
+  to->attr.bit.dbl_underline = true;
+  to->attr.bit.alt_charset   = true;
+  to->attr.bit.pc_charset    = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;7;5m\016"
+                                 CSI "11m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Cyan text on blue background
+  to->fg_color = fc::Cyan;
+  to->bg_color = fc::Blue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "36;22m" CSI "44;25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "22m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink off
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "27m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "27m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "10m" CSI "36;22m" CSI "44;25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Green text color
+  to->fg_color = fc::Green;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to), C_STR(CSI "32;22m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default text color
+  to->fg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( printSequence(oa.changeAttribute(from, to)).c_str()
+                         , C_STR("Esc [ 3 9 m ") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  delete to;
+  delete from;
+}
+
+//----------------------------------------------------------------------
+void FOptiAttrTest::cygwinTest()
+{
+  // Simulate a CygWin terminal
+
+  linuxTest();
+}
+
+//----------------------------------------------------------------------
+void FOptiAttrTest::puttyTest()
+{
+  // Simulate a putty-256color terminal
+
+  FOptiAttr oa;
+  oa.unsetDefaultColorSupport();  // No ANSI default color
+  oa.setNoColorVideo (0);
+  oa.setMaxColor (256);
+  oa.set_enter_bold_mode (C_STR(CSI "1m"));
+  oa.set_exit_bold_mode (C_STR(CSI "22m"));
+  oa.set_enter_dim_mode (C_STR(CSI "2m"));
+  oa.set_exit_dim_mode (C_STR(CSI "22m"));
+  oa.set_enter_italics_mode (0);
+  oa.set_exit_italics_mode (0);
+  oa.set_enter_underline_mode (C_STR(CSI "4m"));
+  oa.set_exit_underline_mode (C_STR(CSI "24m"));
+  oa.set_enter_blink_mode (C_STR(CSI "5m"));
+  oa.set_exit_blink_mode (C_STR(CSI "25m"));
+  oa.set_enter_reverse_mode (C_STR(CSI "7m"));
+  oa.set_exit_reverse_mode (C_STR(CSI "27m"));
+  oa.set_enter_standout_mode (C_STR(CSI "7m"));
+  oa.set_exit_standout_mode (C_STR(CSI "27m"));
+  oa.set_enter_secure_mode (0);
+  oa.set_exit_secure_mode (C_STR(CSI "28m"));
+  oa.set_enter_protected_mode (0);
+  oa.set_exit_protected_mode (C_STR(CSI "0m"));
+  oa.set_enter_crossed_out_mode (C_STR(CSI "9m"));
+  oa.set_exit_crossed_out_mode (C_STR(CSI "29m"));
+  oa.set_enter_dbl_underline_mode (C_STR(CSI "21m"));
+  oa.set_exit_dbl_underline_mode (C_STR(CSI "24m"));
+  oa.set_set_attributes (C_STR(CSI "0"
+                               "%?%p1%p6%|%t;1%;"
+                               "%?%p5%t;2%;"
+                               "%?%p2%t;4%;"
+                               "%?%p1%p3%|%t;7%;"
+                               "%?%p4%t;5%;m"
+                               "%?%p9%t\016%e\017%;"));
+  oa.set_exit_attribute_mode (C_STR(CSI "0m"));
+  oa.set_enter_alt_charset_mode (C_STR("\016"));
+  oa.set_exit_alt_charset_mode (C_STR("\017"));
+  oa.set_enter_pc_charset_mode (C_STR(CSI "11m"));
+  oa.set_exit_pc_charset_mode (C_STR(CSI "10m"));
+  oa.set_a_foreground_color (C_STR(CSI "%?%p1%{8}%<"
+                                       "%t3%p1%d"
+                                       "%e%p1%{16}%<"
+                                       "%t9%p1%{8}%-%d"
+                                       "%e38;5;%p1%d%;m"));
+  oa.set_a_background_color (C_STR(CSI "%?%p1%{8}%<"
+                                       "%t4%p1%d"
+                                       "%e%p1%{16}%<"
+                                       "%t10%p1%{8}%-%d"
+                                       "%e48;5;%p1%d%;m"));
+  oa.set_foreground_color (0);
+  oa.set_background_color (0);
+  oa.set_term_color_pair (0);
+  oa.set_orig_pair (C_STR(CSI "39;49m"));
+  oa.set_orig_orig_colors (C_STR(OSC "R"));
+  oa.initialize();
+
+
+  FOptiAttr::char_data* from = new FOptiAttr::char_data();
+  FOptiAttr::char_data* to = new FOptiAttr::char_data();
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default color + bold
+  from->fg_color = fc::Default;
+  from->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blue text on white background + dim + italic
+  to->fg_color = fc::Blue;
+  to->bg_color = fc::White;
+  to->attr.bit.dim = true;
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;2m\017"
+                                 CSI "34m" CSI "107m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reset attributes + default background
+  to->attr.bit.bold = false;
+  to->attr.bit.dim = false;
+  to->attr.bit.italic = false;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m" CSI "39;49m" CSI "34m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Red text on black background
+  to->fg_color = fc::Red;
+  to->bg_color = fc::Black;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "31m" CSI "40m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // 256 color text and background
+  to->fg_color = fc::SpringGreen3;
+  to->bg_color = fc::NavyBlue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "38;5;42m" CSI "48;5;17m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold on (with default colors)
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off (with default colors)
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim on (with default colors)
+  to->attr.bit.dim = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;2m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off (with default colors)
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic on (with default colors)
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off (with default colors)
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline on (with default colors)
+  to->attr.bit.underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;4m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off (with default colors)
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink on (with default colors)
+  to->attr.bit.blink = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;5m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink off (with default colors)
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse on (with default colors)
+  to->attr.bit.reverse = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;7m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off (with default colors)
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout on (with default colors)
+  to->attr.bit.standout = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;7m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off (with default colors)
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible on (with default colors)
+  to->attr.bit.invisible = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT ( to->code == ' ' );
+  from->code = ' ';
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off (with default colors)
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect on (with default colors)
+  to->attr.bit.protect = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off (with default colors)
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out on (with default colors)
+  to->attr.bit.crossed_out = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "9m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off (with default colors)
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline on (with default colors)
+  to->attr.bit.dbl_underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off (with default colors)
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set on (with default colors)
+  to->attr.bit.alt_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\016") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off (with default colors)
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017" CSI "0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set on (with default colors)
+  to->attr.bit.pc_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017" CSI "11m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off (with default colors)
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m" CSI "10m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Turn on all attributes (with default colors)
+  to->attr.bit.pc_charset    = true;
+  to->attr.bit.bold          = true;
+  to->attr.bit.dim           = true;
+  to->attr.bit.italic        = true;
+  to->attr.bit.underline     = true;
+  to->attr.bit.blink         = true;
+  to->attr.bit.reverse       = true;
+  to->attr.bit.standout      = true;
+  to->attr.bit.invisible     = true;
+  to->attr.bit.protect       = true;
+  to->attr.bit.crossed_out   = true;
+  to->attr.bit.dbl_underline = true;
+  to->attr.bit.alt_charset   = true;
+  to->attr.bit.pc_charset    = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;2;4;7;5m\016"
+                                 CSI "9m" CSI "21m" CSI "11m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Cyan text on blue background
+  to->fg_color = fc::Cyan;
+  to->bg_color = fc::Blue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "36m" CSI "44m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "22m" CSI "2m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "22m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to), C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "24m" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+
+  // Blink off
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "25m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "27m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "27m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "28m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m" CSI "36m" CSI "44m" "\016"
+                                 CSI "11m" CSI "9m" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "29m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "24m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m" CSI "10m" CSI "36m" CSI "44m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Green text color
+  to->fg_color = fc::Green;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to), C_STR(CSI "32m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default text color
+  to->fg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( printSequence(oa.changeAttribute(from, to)).c_str()
+                         , C_STR("Esc [ 3 9 ; 4 9 m Esc [ 4 4 m ") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  delete to;
+  delete from;
+}
+
+//----------------------------------------------------------------------
+void FOptiAttrTest::teratermTest()
+{
+  // Simulate a Tera Term terminal
+
+  FOptiAttr oa;
+  oa.unsetDefaultColorSupport();  // No ANSI default color
+  oa.setNoColorVideo (41);  // Advid standout (1) + blink (8) + bold (32)
+  oa.setMaxColor (16);
+  oa.set_enter_bold_mode (C_STR(CSI "1m"));
+  oa.set_exit_bold_mode (C_STR(CSI "22m"));
+  oa.set_enter_dim_mode (0);
+  oa.set_exit_dim_mode (C_STR(CSI "22m"));
+  oa.set_enter_italics_mode (0);
+  oa.set_exit_italics_mode (0);
+  oa.set_enter_underline_mode (C_STR(CSI "4m"));
+  oa.set_exit_underline_mode (C_STR(CSI "24m"));
+  oa.set_enter_blink_mode (C_STR(CSI "5m"));
+  oa.set_exit_blink_mode (C_STR(CSI "25m"));
+  oa.set_enter_reverse_mode (C_STR(CSI "7m"));
+  oa.set_exit_reverse_mode (C_STR(CSI "27m"));
+  oa.set_enter_standout_mode (C_STR(CSI "7m"));
+  oa.set_exit_standout_mode (C_STR(CSI "27m"));
+  oa.set_enter_secure_mode (0);
+  oa.set_exit_secure_mode (C_STR(CSI "28m"));
+  oa.set_enter_protected_mode (0);
+  oa.set_exit_protected_mode (C_STR(CSI "0m$<2>"));
+  oa.set_enter_crossed_out_mode (C_STR(CSI "9m"));
+  oa.set_exit_crossed_out_mode (C_STR(CSI "29m"));
+  oa.set_enter_dbl_underline_mode (C_STR(CSI "21m"));
+  oa.set_exit_dbl_underline_mode (C_STR(CSI "24m"));
+  oa.set_set_attributes (C_STR(CSI "0"
+                               "%?%p1%p6%|%t;1%;"
+                               "%?%p2%t;4%;"
+                               "%?%p1%p3%|%t;7%;"
+                               "%?%p4%t;5%;m"
+                               "%?%p9%t\016%e\017%;$<2>"));
+  oa.set_exit_attribute_mode (C_STR(CSI "0m$<2>"));
+  oa.set_enter_alt_charset_mode (C_STR("\016"));
+  oa.set_exit_alt_charset_mode (C_STR("\017"));
+  oa.set_enter_pc_charset_mode (0);
+  oa.set_exit_pc_charset_mode (0);
+  oa.set_a_foreground_color (C_STR(CSI "38;5;%p1%dm"));
+  oa.set_a_background_color (C_STR(CSI "48;5;%p1%dm"));
+  oa.set_foreground_color (0);
+  oa.set_background_color (0);
+  oa.set_term_color_pair (0);
+  oa.set_orig_pair (C_STR(CSI "39;49m"));
+  oa.set_orig_orig_colors (0);
+  oa.initialize();
+
+
+  FOptiAttr::char_data* from = new FOptiAttr::char_data();
+  FOptiAttr::char_data* to = new FOptiAttr::char_data();
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default color + bold
+  from->fg_color = fc::Default;
+  from->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blue text on white background + dim + italic
+  to->fg_color = fc::Blue;
+  to->bg_color = fc::White;
+  to->attr.bit.dim = true;
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>" CSI "38;5;4m"
+                                 CSI "48;5;15m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reset attributes + default background
+  to->attr.bit.bold = false;
+  to->attr.bit.dim = false;
+  to->attr.bit.italic = false;
+  to->bg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>" CSI "39;49m"
+                                 CSI "38;5;4m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Red text on black background
+  to->fg_color = fc::Red;
+  to->bg_color = fc::Black;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "38;5;1m" CSI "48;5;0m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // 256 color text and background
+  to->fg_color = fc::SpringGreen3;
+  to->bg_color = fc::NavyBlue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "38;5;10m" CSI "48;5;4m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold on (with default colors)
+  to->fg_color = fc::Default;
+  to->bg_color = fc::Default;
+  to->attr.bit.bold = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off (with default colors)
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim on (with default colors)
+  to->attr.bit.dim = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off (with default colors)
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic on (with default colors)
+  to->attr.bit.italic = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off (with default colors)
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline on (with default colors)
+  to->attr.bit.underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;4m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off (with default colors)
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink on (with default colors)
+  to->attr.bit.blink = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;5m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink off (with default colors)
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse on (with default colors)
+  to->attr.bit.reverse = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;7m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off (with default colors)
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout on (with default colors)
+  to->attr.bit.standout = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;7m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off (with default colors)
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible on (with default colors)
+  to->attr.bit.invisible = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>") );
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT ( to->code == ' ' );
+  from->code = ' ';
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off (with default colors)
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect on (with default colors)
+  to->attr.bit.protect = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off (with default colors)
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out on (with default colors)
+  to->attr.bit.crossed_out = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>" CSI "9m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off (with default colors)
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline on (with default colors)
+  to->attr.bit.dbl_underline = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off (with default colors)
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set on (with default colors)
+  to->attr.bit.alt_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\016$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off (with default colors)
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017" CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set on (with default colors)
+  to->attr.bit.pc_charset = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m\017$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off (with default colors)
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Turn on all attributes (with default colors)
+  to->attr.bit.pc_charset    = true;
+  to->attr.bit.bold          = true;
+  to->attr.bit.dim           = true;
+  to->attr.bit.italic        = true;
+  to->attr.bit.underline     = true;
+  to->attr.bit.blink         = true;
+  to->attr.bit.reverse       = true;
+  to->attr.bit.standout      = true;
+  to->attr.bit.invisible     = true;
+  to->attr.bit.protect       = true;
+  to->attr.bit.crossed_out   = true;
+  to->attr.bit.dbl_underline = true;
+  to->attr.bit.alt_charset   = true;
+  to->attr.bit.pc_charset    = true;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0;1;4;7;5m\016$<2>"
+                                 CSI "9m" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Cyan text on blue background
+  to->fg_color = fc::Cyan;
+  to->bg_color = fc::Blue;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "38;5;6m" CSI "48;5;4m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Bold off
+  to->attr.bit.bold = false;
+  CPPUNIT_ASSERT ( *from == *to );  // because of noColorVideo = 41
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Dim off
+  to->attr.bit.dim = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "22m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Italic off
+  to->attr.bit.italic = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to), C_STR("") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Underline off
+  to->attr.bit.underline = false;
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "24m" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Blink off
+  to->attr.bit.blink = false;
+  CPPUNIT_ASSERT ( *from == *to );  // because of noColorVideo = 41
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Reverse off
+  to->attr.bit.reverse = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "27m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Standout off
+  to->attr.bit.standout = false;
+  CPPUNIT_ASSERT ( *from == *to );  // because of noColorVideo = 41
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Invisible off
+  to->attr.bit.invisible = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "28m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Protect off
+  to->attr.bit.protect = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>" CSI "38;5;6m" CSI "48;5;4m"
+                           "\016" CSI "9m" CSI "21m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Crossed out off
+  to->attr.bit.crossed_out = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "29m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Double underline off
+  to->attr.bit.dbl_underline = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "24m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Alternate character set off
+  to->attr.bit.alt_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR("\017") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // PC character set off
+  to->attr.bit.pc_charset = false;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to)
+                         , C_STR(CSI "0m$<2>" CSI "38;5;6m"
+                                 CSI "48;5;4m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Green text color
+  to->fg_color = fc::Green;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( oa.changeAttribute(from, to), C_STR(CSI "38;5;2m") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  // Default text color
+  to->fg_color = fc::Default;
+  CPPUNIT_ASSERT ( *from != *to );
+  CPPUNIT_ASSERT_CSTRING ( printSequence(oa.changeAttribute(from, to)).c_str()
+                         , C_STR("Esc [ 3 9 ; 4 9 m Esc [ 4 8 ; 5 ; 4 m ") );
+  CPPUNIT_ASSERT ( *from == *to );
+  CPPUNIT_ASSERT ( oa.changeAttribute(from, to) == 0 );
+
+  delete to;
+  delete from;
+}
+
 //----------------------------------------------------------------------
 std::string FOptiAttrTest::printSequence (char* str)
 {