XCTAssertEqual fails to compare two string values?

Question

I added a simple unit test to test my string extension. But it fails. What I am I doing wrong here?

From what I know XCTAssertEqual is testing value and

Answer 1

I've just had a similar issue which might help someone.

I have a Float extension function which returns a string. The following test fails:

testValue = 0.01
XCTAssertEqual(testValue.formattedForCost(), "0,01 €")

With the following message:

Assertions: XCTAssertEqual failed: ("Optional("0,01 €")") is not equal to ("Optional("0,01 €")")

Which is rather annoying. However I discovered if I change my test to use the unicode no-break space character:

XCTAssertEqual(testValue.formattedForCost(), "0,01\u{00a0}€")

It passes.