test(svg): add accessibility coverage

Author: chavanGaneshDatta

lib/svg/constants.accessibility.test.ts

@@ -0,0 +1,50 @@
+// lib/svg/constants.accessibility.test.ts
+
+import { describe, expect, it } from 'vitest';
+import {
+  SVG_WIDTH,
+  SVG_HEIGHT,
+  FONT_MAP,
+  CONTRIBUTION_MILESTONES,
+  STREAK_MILESTONES,
+} from './constants';
+
+describe('SVG Constants Accessibility', () => {
+  it('provides valid SVG dimensions for accessible rendering', () => {
+    expect(SVG_WIDTH).toBeGreaterThan(0);
+    expect(SVG_HEIGHT).toBeGreaterThan(0);
+  });
+
+  it('exposes readable font mappings for SVG text content', () => {
+    expect(FONT_MAP).toHaveProperty('jetbrains');
+    expect(FONT_MAP).toHaveProperty('fira');
+    expect(FONT_MAP).toHaveProperty('roboto');
+
+    Object.values(FONT_MAP).forEach((font) => {
+      expect(typeof font).toBe('string');
+      expect(font.length).toBeGreaterThan(0);
+    });
+  });
+
+  it('defines contribution milestone values suitable for accessible labels', () => {
+    expect(CONTRIBUTION_MILESTONES.length).toBeGreaterThan(0);
+
+    CONTRIBUTION_MILESTONES.forEach((value) => {
+      expect(value).toBeGreaterThan(0);
+    });
+  });
+
+  it('defines streak milestone values suitable for accessible labels', () => {
+    expect(STREAK_MILESTONES.length).toBeGreaterThan(0);
+
+    STREAK_MILESTONES.forEach((value) => {
+      expect(value).toBeGreaterThan(0);
+    });
+  });
+
+  it('maintains ascending milestone ordering for predictable narration', () => {
+    expect(CONTRIBUTION_MILESTONES).toEqual([...CONTRIBUTION_MILESTONES].sort((a, b) => a - b));
+
+    expect(STREAK_MILESTONES).toEqual([...STREAK_MILESTONES].sort((a, b) => a - b));
+  });
+});