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mocked-class.test.ts
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mocked-class.test.ts
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import { expect, test, vi } from 'vitest'
import { MockedE, symbolFn } from '../src/mockedE'
vi.mock('../src/mockedE')
test(`each instance's methods of mocked class should have independent mock function state`, () => {
const instance1 = new MockedE()
const instance2 = new MockedE()
expect(instance1).not.toBe(instance2)
expect(instance1.testFn).not.toBe(instance2.testFn)
expect(instance1.testFn).not.toBe(MockedE.prototype.testFn)
expect(vi.mocked(instance1.testFn).mock).not.toBe(vi.mocked(instance2.testFn).mock)
expect(instance1.testFn('a')).toMatchInlineSnapshot(`undefined`)
expect(instance1.testFn).toBeCalledTimes(1)
expect(instance2.testFn).toBeCalledTimes(0)
expect(MockedE.prototype.testFn).toBeCalledTimes(1)
expect(vi.mocked(instance1.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"a",
],
]
`)
expect(vi.mocked(MockedE.prototype.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"a",
],
]
`)
expect(instance2.testFn('b')).toMatchInlineSnapshot(`undefined`)
expect(instance1.testFn).toBeCalledTimes(1)
expect(instance2.testFn).toBeCalledTimes(1)
expect(MockedE.prototype.testFn).toBeCalledTimes(2)
expect(vi.mocked(instance2.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"b",
],
]
`)
expect(vi.mocked(MockedE.prototype.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"a",
],
[
"b",
],
]
`)
expect(instance1.testFn('c')).toMatchInlineSnapshot(`undefined`)
expect(instance1.testFn).toBeCalledTimes(2)
expect(instance2.testFn).toBeCalledTimes(1)
expect(MockedE.prototype.testFn).toBeCalledTimes(3)
expect(vi.mocked(instance1.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"a",
],
[
"c",
],
]
`)
expect(vi.mocked(instance2.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"b",
],
]
`)
expect(vi.mocked(MockedE.prototype.testFn).mock.calls).toMatchInlineSnapshot(`
[
[
"a",
],
[
"b",
],
[
"c",
],
]
`)
// test same things for symbol key method
expect(instance1[symbolFn]).not.toBe(instance2[symbolFn])
expect(instance1[symbolFn]).not.toBe(MockedE.prototype[symbolFn])
expect(vi.mocked(instance1[symbolFn]).mock).not.toBe(vi.mocked(instance2[symbolFn]).mock)
expect(instance1[symbolFn]('d')).toMatchInlineSnapshot(`undefined`)
expect(instance1[symbolFn]).toBeCalledTimes(1)
expect(instance2[symbolFn]).toBeCalledTimes(0)
expect(MockedE.prototype[symbolFn]).toBeCalledTimes(1)
expect(vi.mocked(instance1[symbolFn]).mock.calls).toMatchInlineSnapshot(`
[
[
"d",
],
]
`)
expect(vi.mocked(instance2[symbolFn]).mock.calls).toMatchInlineSnapshot(`[]`)
expect(vi.mocked(MockedE.prototype[symbolFn]).mock.calls).toMatchInlineSnapshot(`
[
[
"d",
],
]
`)
})