fix(expect): fix toBeDefined with expect.poll (#6562)

packages/expect/src/jest-expect.ts

@@ -384,14 +384,13 @@ export const JestChaiExpect: ChaiPlugin = (chai, utils) => {
     return this.be.null
   })
   def('toBeDefined', function () {
-    const negate = utils.flag(this, 'negate')
-    utils.flag(this, 'negate', false)
-
-    if (negate) {
-      return this.be.undefined
-    }
-
-    return this.not.be.undefined
+    const obj = utils.flag(this, 'object')
+    this.assert(
+      typeof obj !== 'undefined',
+      'expected #{this} to be defined',
+      'expected #{this} to be undefined',
+      obj,
+    )
   })
   def(
     'toBeTypeOf',

test/core/test/expect-poll.test.ts

@@ -83,3 +83,26 @@ test('custom matcher works correctly', async () => {
   expect(fn).toHaveBeenCalledTimes(3)
   expect(fn).toHaveBeenCalledWith({ poll: true })
 })
+
+test('toBeDefined', async () => {
+  await expect.poll(() => 1).toBeDefined()
+  await expect.poll(() => undefined).not.toBeDefined()
+
+  await expect(() =>
+    expect.poll(() => 1, { timeout: 100, interval: 10 }).not.toBeDefined(),
+  ).rejects.toThrowError(expect.objectContaining({
+    message: 'Matcher did not succeed in 100ms',
+    cause: expect.objectContaining({
+      message: 'expected 1 to be undefined',
+    }),
+  }))
+
+  await expect(() =>
+    expect.poll(() => undefined, { timeout: 100, interval: 10 }).toBeDefined(),
+  ).rejects.toThrowError(expect.objectContaining({
+    message: 'Matcher did not succeed in 100ms',
+    cause: expect.objectContaining({
+      message: 'expected undefined to be defined',
+    }),
+  }))
+})