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method

test.MatchersBuiltin.toHavePropertytoHaveProperty(keyPath: string | number | string | number[],value?: unknown): void;Asserts that a value has a property with the expected name, and value if provided.

@param keyPaththe expected property name or path, or an index

@param valuethe expected property value, if provided

expect(new Set()).toHaveProperty("size"); expect(new Uint8Array()).toHaveProperty("byteLength", 0); expect({ kitchen: { area: 20 }}).toHaveProperty("kitchen.area", 20); expect({ kitchen: { area: 20 }}).toHaveProperty(["kitchen", "area"], 20);

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