1 files changed, 35 insertions, 0 deletions
diff --git a/spec/frontend/lib/utils/color_utils_spec.js b/spec/frontend/lib/utils/color_utils_spec.js
new file mode 100644
index 00000000000..433e9d5a85e
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+++ b/spec/frontend/lib/utils/color_utils_spec.js
@@ -0,0 +1,35 @@
+import { textColorForBackground, hexToRgb } from '~/lib/utils/color_utils';
+
+describe('Color utils', () => {
+  describe('Converting hex code to rgb', () => {
+    it('convert hex code to rgb', () => {
+      expect(hexToRgb('#000000')).toEqual([0, 0, 0]);
+      expect(hexToRgb('#ffffff')).toEqual([255, 255, 255]);
+    });
+
+    it('convert short hex code to rgb', () => {
+      expect(hexToRgb('#000')).toEqual([0, 0, 0]);
+      expect(hexToRgb('#fff')).toEqual([255, 255, 255]);
+    });
+
+    it('handle conversion regardless of the characters case', () => {
+      expect(hexToRgb('#f0F')).toEqual([255, 0, 255]);
+    });
+  });
+
+  describe('Getting text color for given background', () => {
+    // following tests are being ported from `text_color_for_bg` section in labels_helper_spec.rb
+    it('uses light text on dark backgrounds', () => {
+      expect(textColorForBackground('#222E2E')).toEqual('#FFFFFF');
+    });
+
+    it('uses dark text on light backgrounds', () => {
+      expect(textColorForBackground('#EEEEEE')).toEqual('#333333');
+    });
+
+    it('supports RGB triplets', () => {
+      expect(textColorForBackground('#FFF')).toEqual('#333333');
+      expect(textColorForBackground('#000')).toEqual('#FFFFFF');
+    });
+  });
+});