tests(_internal/colors): Add test for heading() with colors enabled

Verify that heading() applies bright_cyan (ANSI 96) with bold when
colors are enabled. Previously only the disabled case was tested.

Also adds ANSI_BRIGHT_CYAN constant to conftest.py for test assertions.

Author: tony

tests/_internal/conftest.py

@@ -14,6 +14,7 @@
 ANSI_BLUE = "\033[34m"
 ANSI_MAGENTA = "\033[35m"
 ANSI_CYAN = "\033[36m"
+ANSI_BRIGHT_CYAN = "\033[96m"
 ANSI_RESET = "\033[0m"
 ANSI_BOLD = "\033[1m"
 

tests/_internal/test_colors.py

@@ -9,6 +9,7 @@
 from tests._internal.conftest import (
     ANSI_BLUE,
     ANSI_BOLD,
+    ANSI_BRIGHT_CYAN,
     ANSI_CYAN,
     ANSI_GREEN,
     ANSI_MAGENTA,
@@ -297,3 +298,17 @@ def test_style_with_rgb_non_integer() -> None:
     """style() should reject non-integer RGB values."""
     with pytest.raises(UnknownStyleColor):
         style("test", fg=(255.5, 128, 0))  # type: ignore[arg-type]
+
+
+# heading() method tests
+
+
+def test_heading_applies_bright_cyan_bold(monkeypatch: pytest.MonkeyPatch) -> None:
+    """heading() applies bright_cyan with bold when colors are enabled."""
+    monkeypatch.delenv("NO_COLOR", raising=False)
+    colors = Colors(ColorMode.ALWAYS)
+    result = colors.heading("Local workspaces:")
+    assert ANSI_BRIGHT_CYAN in result
+    assert ANSI_BOLD in result
+    assert "Local workspaces:" in result
+    assert ANSI_RESET in result