Track memory leaks with XCTestCase

XCTestCase+MemoryLeaksTracker.swift

import XCTest

extension XCTestCase {
    /// Given an instance, it will track at the end of every test case if it has been deallocated alerting about potential memory leak.
    func trackForMemoryLeaks(_ instance: AnyObject, file: StaticString = #filePath, line: UInt = #line) {
        addTeardownBlock { [weak instance] in
            XCTAssertNil(instance, "Instance is not dealocated. Potential memory leak", file: file, line: line)
        }
    }
}


// MARK: - Usage
class MemoryLeakExampleTest: XCTestCase {
    
    func test_BasicMemoryLeak() {
        let systemUnderTest = AnInstanceOfAClass()
        trackForMemoryLeaks(systemUnderTest)
    }
    
}