Can I run an XCTest suite multiple times?

Question

Is it possible to have Xcode run your unit tests multiple times?

I had an issue in several unit tests that caused intermittent failures. Now that I think I\

Answer 1

Try using a for loop:

func testMultiple() {
    for _ in 0...100 {
            ...
            XCTAssert(errMessage == nil, "no error expected")        
    }
}

Note this doesn't work within a self.measureBlock(). You'll get an NSInternalConsistencyException: Cannot measure metrics while already measuring metrics

However, you can CALL this within a measureBlock():

func testMultiple() {
    for _ in 0...100 {
            ...
            XCTAssert(errMessage == nil, "no error expected")        
    }
}

func testPerformance() {
    self.measureBlock() {
        self.testMultiple()
    }
}

Xcode 8 runs the measureBlock code 10 times.