marshroute

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import XCTest
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@testable import Marshroute
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final class PeekAndPopUtilityImplTests_passesPreviewingContextToRegisteredViewController: BasePeekAndPopUtilityImplTestCase {    
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    func testPeekAndPopUtility_passesPreviewingContextToRegisteredViewController_ifViewControllerRegistersForPreviewing() {
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        // When
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        registerSourceViewControllerForPreviewing()
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        // Then
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        XCTAssert(previewingContext != nil)
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    }
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    func testPeekAndPopUtility_passesPreviewingContextToRegisteredViewController_ifViewControllerReregistersForPreviewing() {
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        // When
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        registerSourceViewControllerForPreviewing()
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        unregisterSourceViewControllerFromPreviewing()
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        previewingContext = nil
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        registerSourceViewControllerForPreviewing()
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        // Then
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        XCTAssert(previewingContext != nil)
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    }
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    func testPeekAndPopUtility_passesPreviewingContextToRegisteredViewController_ifPeekGetsInterruptedWithAnotherTransitionOnOnscreenRegisteredViewController() {
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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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        let previousPreviewingContext = previewingContext
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        // When
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        beginPeekOnRegisteredViewController()
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        interruptPeekWithAnotherTransitionOnRegisteredViewController()
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        // Then
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        XCTAssert(previewingContext !== previousPreviewingContext)
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    }
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}    
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