test : added unit tests for anthropic.ts

test/anthropic.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect } from "vitest";
+import { generateWeeklySummary } from "../src/lib/anthropic";
+
+describe("anthropic", () => {
+  describe("generateWeeklySummary", () => {
+    it("returns null when ANTHROPIC_API_KEY is not set", async () => {
+      // The function checks ANTHROPIC_API_KEY and returns null if empty
+      const result = await generateWeeklySummary({
+        commits: { current: 10, previous: 5, delta: 5, trend: "up" },
+        prs: {
+          thisWeek: { opened: 3, merged: 2 },
+          lastWeek: { opened: 1, merged: 1 },
+        },
+        streak: 7,
+        topRepo: "my-project",
+        activeDays: { thisWeek: 5, lastWeek: 3 },
+      });
+      // Without ANTHROPIC_API_KEY set, returns null
+      expect(result).toBeNull();
+    });
+  });
+});