[bun:test] Auto-import jest globals in test files

2 files changed, 36 insertions, 0 deletions

diff --git a/test/bun.js/jest-doesnt-auto-import.js b/test/bun.js/jest-doesnt-auto-import.js
new file mode 100644
index 000000000..4d4a02b37
--- /dev/null
+++ b/test/bun.js/jest-doesnt-auto-import.js
@@ -0,0 +1,12 @@
+export function getJestGlobals() {
+  return {
+    describe: typeof describe === "function" ? describe : undefined,
+    it: typeof it === "function" ? it : undefined,
+    test: typeof test === "function" ? test : undefined,
+    expect: typeof expect === "function" ? expect : undefined,
+    beforeAll: typeof beforeAll === "function" ? beforeAll : undefined,
+    beforeEach: typeof beforeEach === "function" ? beforeEach : undefined,
+    afterAll: typeof afterAll === "function" ? afterAll : undefined,
+    afterEach: typeof afterEach === "function" ? afterEach : undefined,
+  };
+}
diff --git a/test/bun.js/test-auto-import-jest-globals.test.js b/test/bun.js/test-auto-import-jest-globals.test.js
new file mode 100644
index 000000000..5baeae43e
--- /dev/null
+++ b/test/bun.js/test-auto-import-jest-globals.test.js
@@ -0,0 +1,24 @@
+test("Jest auto imports", () => {
+  expect(true).toBe(true);
+  expect(typeof describe).toBe("function");
+  expect(typeof it).toBe("function");
+  expect(typeof test).toBe("function");
+  expect(typeof expect).toBe("function");
+  expect(typeof beforeAll).toBe("function");
+  expect(typeof beforeEach).toBe("function");
+  expect(typeof afterAll).toBe("function");
+  expect(typeof afterEach).toBe("function");
+});
+
+test("Jest's globals aren't available in every file", async () => {
+  const jestGlobals = await import("./jest-doesnt-auto-import.js");
+
+  expect(typeof jestGlobals.describe).toBe("undefined");
+  expect(typeof jestGlobals.it).toBe("undefined");
+  expect(typeof jestGlobals.test).toBe("undefined");
+  expect(typeof jestGlobals.expect).toBe("undefined");
+  expect(typeof jestGlobals.beforeAll).toBe("undefined");
+  expect(typeof jestGlobals.beforeEach).toBe("undefined");
+  expect(typeof jestGlobals.afterAll).toBe("undefined");
+  expect(typeof jestGlobals.afterEach).toBe("undefined");
+});