How to match partial nest properties passed to toHaveBeenCalledWith? - jasmine

Question

describe("Test", function() {
it("should pass", function() {
const callback = (data) => {};
const callBackSpy = jasmine.createSpy().and.callFake(callback);
const createData = (message) => {
return {
outerProp: "outerValue",
nestedObj: {
message: message,
prop1: "value1",
prop2: "value2"
}
};
};
const someApiCall = (callback) => {
setTimeout(callback(createData("test1")), 1000);
setTimeout(callback(createData("test2")), 2000);
setTimeout(callback(createData("hello world")), 5000);
};
someApiCall(callBackSpy);
expect(callBackSpy).toHaveBeenCalledWith(
jasmine.objectContaining({
nestedObj: {
prop1: "hello world"
}
})
);
});
});
I created a spy on a callback function which gets called multiple times with different parameters each time. The parameter is a complex nested object. I am looking for an object with a specific property.
If I specify all the properties like below, it works
expect(callBackSpy).toHaveBeenCalledWith(
jasmine.objectContaining({
outerProp: "outerValue",
nestedObj: {
message: "hello world",
prop1: "value1",
prop2: "value2"
}
})
);
But I don't know full properties. So, I am looking only for a specific property like below
expect(callBackSpy).toHaveBeenCalledWith(
jasmine.objectContaining({
nestedObj: {
message: "hello world"
}
})
);
Is there a way to make this work with a partial match?

Answer 1

You could try this.
expect(callBackSpy).toHaveBeenCalledWith(
jasmine.objectContaining({
nestedObj: jasmine.objectContaining({message: 'hello world'})
})
);
Another way would be to extract the arguments from the method call and test for specific nested attribute.
const arguments = callBackSpy.calls.argsFor(0);
expect(arguments[0]['nesedObject']['message'].toBe('hello world');