test(svg): add massive scaling coverage

Author: chavanGaneshDatta

lib/svg/constants.massive-scaling.test.ts

@@ -0,0 +1,48 @@
+// lib/svg/constants.massive-scaling.test.ts
+
+import { describe, expect, it } from 'vitest';
+import {
+  SVG_WIDTH,
+  SVG_HEIGHT,
+  GHOST_HEIGHT_PX,
+  LOG_SCALE_MULTIPLIER,
+  LINEAR_SCALE_MULTIPLIER,
+  MAX_LOG_HEIGHT,
+  MAX_LINEAR_HEIGHT,
+  CONTRIBUTION_MILESTONES,
+  STREAK_MILESTONES,
+} from './constants';
+
+describe('SVG Constants Massive Scaling', () => {
+  it('supports large simulated contribution datasets', () => {
+    const contributions = Array.from({ length: 10000 }, (_, i) => i + 1);
+
+    expect(contributions.length).toBe(10000);
+    expect(Math.max(...contributions)).toBe(10000);
+  });
+
+  it('maintains positive scaling configuration values', () => {
+    expect(LOG_SCALE_MULTIPLIER).toBeGreaterThan(0);
+    expect(LINEAR_SCALE_MULTIPLIER).toBeGreaterThan(0);
+    expect(MAX_LOG_HEIGHT).toBeGreaterThan(0);
+    expect(MAX_LINEAR_HEIGHT).toBeGreaterThan(0);
+  });
+
+  it('provides valid SVG dimensions under high-volume scenarios', () => {
+    expect(SVG_WIDTH).toBeGreaterThan(0);
+    expect(SVG_HEIGHT).toBeGreaterThan(0);
+    expect(GHOST_HEIGHT_PX).toBeGreaterThan(0);
+  });
+
+  it('maintains milestone integrity with large data references', () => {
+    expect(CONTRIBUTION_MILESTONES.every((v) => v > 0)).toBe(true);
+    expect(STREAK_MILESTONES.every((v) => v > 0)).toBe(true);
+  });
+
+  it('handles repeated access without configuration drift', () => {
+    for (let i = 0; i < 10000; i++) {
+      expect(SVG_WIDTH).toBe(600);
+      expect(SVG_HEIGHT).toBe(420);
+    }
+  });
+});