Fix Ansi outputting escape sequences when disabled, fixes #215

Author: gnodet

src/main/java/org/fusesource/jansi/Ansi.java

@@ -249,6 +249,26 @@ public Ansi bgBright(Color color) {
             return this;
         }
 
+        @Override
+        public Ansi fg(int color) {
+            return this;
+        }
+
+        @Override
+        public Ansi fgRgb(int r, int g, int b) {
+            return this;
+        }
+
+        @Override
+        public Ansi bg(int color) {
+            return this;
+        }
+
+        @Override
+        public Ansi bgRgb(int r, int g, int b) {
+            return this;
+        }
+
         @Override
         public Ansi a(Attribute attribute) {
             return this;

src/test/java/org/fusesource/jansi/AnsiTest.java

@@ -139,6 +139,16 @@ public void testCursorUpLine(int n, String expected) {
         assertAnsi(expected, new Ansi().cursorUpLine(n));
     }
 
+    @Test
+    public void testColorDisabled() {
+        Ansi.setEnabled(false);
+        try {
+            assertEquals("test", Ansi.ansi().fg(32).a("t").fgRgb(0).a("e").bg(24).a("s").bgRgb(100).a("t").toString());
+        } finally {
+            Ansi.setEnabled(true);
+        }
+    }
+
     private static void assertAnsi(String expected, Ansi actual) {
         assertEquals(expected.replace("ESC", "\033"), actual.toString());
     }