test: add language colors coverage

Author: bhavyajain0810

lib/svg/languageColors.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from 'vitest';
+
+import { LANGUAGE_COLORS } from './languageColors';
+
+describe('LANGUAGE_COLORS', () => {
+  it('contains the correct TypeScript color', () => {
+    expect(LANGUAGE_COLORS.TypeScript).toBe('#3178c6');
+  });
+
+  it('contains the correct JavaScript color', () => {
+    expect(LANGUAGE_COLORS.JavaScript).toBe('#f1e05a');
+  });
+
+  it('defines Python color', () => {
+    expect(LANGUAGE_COLORS.Python).toBeDefined();
+  });
+
+  it('uses valid 6-digit hex colors for every language', () => {
+    for (const color of Object.values(LANGUAGE_COLORS)) {
+      expect(color).toMatch(/^#[0-9a-fA-F]{6}$/);
+    }
+  });
+
+  it('contains at least 20 languages', () => {
+    expect(Object.keys(LANGUAGE_COLORS).length).toBeGreaterThanOrEqual(20);
+  });
+
+  it('does not contain empty language names', () => {
+    for (const language of Object.keys(LANGUAGE_COLORS)) {
+      expect(language.trim()).not.toBe('');
+    }
+  });
+});