tests: add NSColorSpace tests

ChangeLog

@@ -29,6 +29,14 @@
 	accessors, the table defaults and flags, and the table block position
 	accessors.
 
+2026-07-12 Todd White <todd.white@thalion.global>
+
+	* Tests/gui/NSColorSpace/basic.m:
+	* Tests/gui/NSColorSpace/TestInfo:
+	Add tests for NSColorSpace: the model enum values, and the colour
+	space model, component count, name and singleton identity of the
+	standard colour spaces.
+
 2026-07-12 Todd White <todd.white@thalion.global>
 
 	* Tests/gui/NSFontDescriptor/basic.m:

Tests/gui/NSColorSpace/basic.m

@@ -0,0 +1,73 @@
+/* Coverage for NSColorSpace: the model enum values, and the colour space
+ * model, component count, name and singleton identity of the standard colour
+ * spaces.  These are plain value objects and need no backend.
+ *
+ * The generic spaces on macOS carry an ICC profile and longer localized
+ * names; this class does not, so the ICC data and the exact name are not
+ * covered.
+ */
+#include "Testing.h"
+#include <Foundation/NSAutoreleasePool.h>
+#include <Foundation/NSString.h>
+#include <AppKit/NSColorSpace.h>
+
+int
+main(int argc, char **argv)
+{
+  CREATE_AUTORELEASE_POOL(arp);
+
+  START_SET("model enum values")
+    PASS(NSUnknownColorSpaceModel == -1 && NSGrayColorSpaceModel == 0
+      && NSRGBColorSpaceModel == 1 && NSCMYKColorSpaceModel == 2
+      && NSLABColorSpaceModel == 3 && NSDeviceNColorSpaceModel == 4,
+      "the NSColorSpaceModel values match AppKit");
+  END_SET("model enum values")
+
+  START_SET("generic colour spaces")
+    NSColorSpace	*rgb = [NSColorSpace genericRGBColorSpace];
+    NSColorSpace	*gray = [NSColorSpace genericGrayColorSpace];
+    NSColorSpace	*cmyk = [NSColorSpace genericCMYKColorSpace];
+
+    PASS([rgb colorSpaceModel] == NSRGBColorSpaceModel
+      && [rgb numberOfColorComponents] == 3,
+      "the generic RGB space is an RGB model with three components");
+    PASS([gray colorSpaceModel] == NSGrayColorSpaceModel
+      && [gray numberOfColorComponents] == 1,
+      "the generic gray space is a gray model with one component");
+    PASS([cmyk colorSpaceModel] == NSCMYKColorSpaceModel
+      && [cmyk numberOfColorComponents] == 4,
+      "the generic CMYK space is a CMYK model with four components");
+    PASS([rgb localizedName] != nil, "a colour space has a localized name");
+  END_SET("generic colour spaces")
+
+  START_SET("device colour spaces")
+    NSColorSpace	*rgb = [NSColorSpace deviceRGBColorSpace];
+    NSColorSpace	*gray = [NSColorSpace deviceGrayColorSpace];
+    NSColorSpace	*cmyk = [NSColorSpace deviceCMYKColorSpace];
+
+    PASS([rgb colorSpaceModel] == NSRGBColorSpaceModel
+      && [rgb numberOfColorComponents] == 3,
+      "the device RGB space is an RGB model with three components");
+    PASS([gray colorSpaceModel] == NSGrayColorSpaceModel
+      && [gray numberOfColorComponents] == 1,
+      "the device gray space is a gray model with one component");
+    PASS([cmyk colorSpaceModel] == NSCMYKColorSpaceModel
+      && [cmyk numberOfColorComponents] == 4,
+      "the device CMYK space is a CMYK model with four components");
+  END_SET("device colour spaces")
+
+  START_SET("standard spaces are shared")
+    PASS([NSColorSpace genericRGBColorSpace]
+      == [NSColorSpace genericRGBColorSpace],
+      "the generic RGB space is the same object each time");
+    PASS([NSColorSpace deviceRGBColorSpace]
+      == [NSColorSpace deviceRGBColorSpace],
+      "the device RGB space is the same object each time");
+    PASS([NSColorSpace genericRGBColorSpace]
+      != [NSColorSpace deviceRGBColorSpace],
+      "the generic and device RGB spaces are different objects");
+  END_SET("standard spaces are shared")
+
+  DESTROY(arp);
+  return 0;
+}