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SOLVED: UltimatePortfolio Asset Tests

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I've just completed the first video on testing in Ultimate Portfolio. About the first testing method:

func testColoursExist() {
    for colour in Project.colours {
        XCTAssertNotNil(UIColor(named: colour), "Failed to load colour '\(colour)' from Asset Catalog.")
    }

I understand that the expected names of colours come from the array of colour names in the Project extension (Project-CoreDataHelpers file) but what exactly is happening that means this function knows to cross check these colour names with the colours asset catalog?

Thank you.

1      

When it loops though the array of colors (which are Strings) it puts the color in UIColor(named: String) and if this return a nil in other words there is no color string name in the Asset Catalog.

If you want to see it change add a other color to the array and run the test and it should fail.

1      

Thank you @NigelGee

1      

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