marshroute

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import XCTest
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@testable import Marshroute
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final class PeekAndPopUtilityImplTests_passesPeekViewControllerToUiKit: BasePeekAndPopUtilityImplTestCase {    
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    func testPeekAndPopUtility_passesPeekViewControllerToUiKit_ifPeekBeginsOnOnscreenRegisteredViewController() {
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        // Given
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        bindSourceViewControllerToWindow()
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        registerSourceViewControllerForPreviewing(
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            onPeek: { _ in
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                self.invokeTransitionToPeekViewController()
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            }
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        )
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        // When
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        let viewController = beginPeekOnRegisteredViewController()
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        // Then
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        XCTAssert(viewController === peekViewController)
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    }
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    func testPeekAndPopUtility_passesPeekViewControllerToUIKit_ifSamePeekFailedToBeginAndNewPeekBeginsOnOnscreenRegisteredViewController() {
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        // Given
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        bindSourceViewControllerToWindow()
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        bindSourceViewController2ToWindow()
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        registerSourceViewControllerForPreviewing()
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        registerSourceViewController2ForPreviewing(
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            onPeek: { _ in
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                self.invokeTransitionToPeekViewController()
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            }
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        )
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        // When
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        beginPeekOnRegisteredViewController()
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        let viewController2 = beginPeekOnRegisteredViewController2()
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        // Then
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        XCTAssert(viewController2 === peekViewController)
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    }
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    func testPeekAndPopUtility_passesNoPeekViewControllerToUIKit_ifPeekBeginsOnOffscreenRegisteredViewController() {
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        // Given
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        unbindSourceViewControllerFromWindow()
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        registerSourceViewControllerForPreviewing(
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            onPeek: { _ in
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                self.invokeTransitionToPeekViewController()
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            }
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        )
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        // When
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        let viewController = beginPeekOnRegisteredViewController()
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        // Then
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        XCTAssert(viewController === nil)
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    }    
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    func testPeekAndPopUtility_passesNoPeekViewControllerToUIKit_ifSamePeekIsAlreadyBeganAndNewPeekBeginsOnOnscreenRegisteredViewController() {
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        // Given
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        bindSourceViewControllerToWindow()
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        bindSourceViewController2ToWindow()
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        registerSourceViewControllerForPreviewing(
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            onPeek: { _ in
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                self.invokeTransitionToPeekViewController()
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            }
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        )
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        registerSourceViewController2ForPreviewing()
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        // When
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        beginPeekOnRegisteredViewController()
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        let viewController2 = beginPeekOnRegisteredViewController2()
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        // Then
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        XCTAssert(viewController2 === nil)
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    }
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}    
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