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test/lib/youtube.test.ts

@@ -0,0 +1,70 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { getYoutubeUser } from "../../src/lib/youtube";
+
+describe("getYoutubeUser", () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("returns mapped user on success", async () => {
+    const mockResponse = {
+      items: [
+        {
+          id: "chan1",
+          snippet: {
+            title: "Channel Title",
+            thumbnails: { default: { url: "http://example.com/avatar.png" } },
+          },
+        },
+      ],
+    };
+
+    vi.stubGlobal(
+      "fetch",
+      vi.fn().mockResolvedValue({
+        ok: true,
+        json: async () => mockResponse,
+      }),
+    );
+
+    const result = await getYoutubeUser("token-abc");
+
+    expect(result).toEqual({
+      userId: "chan1",
+      displayName: "Channel Title",
+      profileImageUrl: "http://example.com/avatar.png",
+    });
+  });
+
+  it("throws when response not ok", async () => {
+    vi.stubGlobal(
+      "fetch",
+      vi.fn().mockResolvedValue({
+        ok: false,
+        statusText: "Unauthorized",
+      }),
+    );
+
+    await expect(getYoutubeUser("bad-token")).rejects.toThrow(
+      "Failed to get YouTube user: Unauthorized",
+    );
+  });
+
+  it("throws when no items returned", async () => {
+    vi.stubGlobal(
+      "fetch",
+      vi.fn().mockResolvedValue({
+        ok: true,
+        json: async () => ({ items: [] }),
+      }),
+    );
+
+    await expect(getYoutubeUser("token-xyz")).rejects.toThrow(
+      "No YouTube channel found",
+    );
+  });
+});