11 lines
298 B
JavaScript
11 lines
298 B
JavaScript
let uppercase = require("./../uppercase");
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describe("uppercase", () => {
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test("uppercase hello returns HELLO", () => {
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uppercase = jest.fn(() => "HELLO");
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const result = uppercase("hello");
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expect(uppercase).toHaveBeenCalledWith("hello");
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expect(result).toBe("HELLO");
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});
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});
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