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More concise, faster to add more tests, and also allows for natural testing of interfacing with the library with Swift
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...ableSectionCollectionViewLayout.xcodeproj/xcshareddata/xcschemes/Example Project.xcscheme
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JEKScrollableSectionCollectionViewLayout.xcodeproj/xcshareddata/xcschemes/Tests.xcscheme
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| // | ||
| // Use this file to import your target's public headers that you would like to expose to Swift. | ||
| // | ||
| #import "JEKScrollableSectionCollectionViewLayout.h" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| import Foundation | ||
| import XCTest | ||
|
|
||
| class LayoutMeasurements : NSObject, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout { | ||
| var itemSize = CGSize(width: 10, height: 10) | ||
| var headerSize = CGSize.zero | ||
| var footerSize = CGSize.zero | ||
| var sectionInsets = UIEdgeInsets.zero | ||
| var interItemSpacing: CGFloat = 0 | ||
| var numberOfSections: Int = 1 | ||
| var numberOfItems: Int = 2 | ||
| } | ||
|
|
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| class Tests : XCTestCase { | ||
| var layout: JEKScrollableSectionCollectionViewLayout! | ||
| var collectionView: UICollectionView! | ||
| var measurements: LayoutMeasurements! | ||
|
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| override func setUp() { | ||
| layout = JEKScrollableSectionCollectionViewLayout() | ||
| collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: 320, height: 100), collectionViewLayout: layout) | ||
| measurements = LayoutMeasurements() | ||
| collectionView.dataSource = self.measurements | ||
| collectionView.delegate = self.measurements | ||
| } | ||
|
|
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| func testInterItemSpacing() { | ||
| measurements.interItemSpacing = 5 | ||
| layout.prepare() | ||
| let expectedOrigin = CGPoint(x: measurements.itemSize.width + measurements.interItemSpacing, y: 0) | ||
| let expectedFrame = CGRect(origin: expectedOrigin, size: measurements.itemSize) | ||
| let attributes = layout.layoutAttributesForItem(at: IndexPath(item: 1, section: 0)) | ||
| XCTAssertEqual(attributes?.frame, expectedFrame) | ||
| } | ||
|
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| func testSectionInsets() { | ||
| measurements.sectionInsets = UIEdgeInsets(top: 10, left: 20, bottom: 10, right: 50) | ||
| layout.prepare() | ||
| let expectedOrigin = CGPoint(x: measurements.sectionInsets.left + measurements.itemSize.width, | ||
| y: measurements.sectionInsets.top) | ||
| let expectedFrame = CGRect(origin: expectedOrigin, size: measurements.itemSize) | ||
| let attributes = layout.layoutAttributesForItem(at: IndexPath(row: 1, section: 0)) | ||
| XCTAssertEqual(attributes?.frame, expectedFrame) | ||
|
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| let expectedContentSize = CGSize(width: collectionView.frame.size.width, | ||
| height: measurements.sectionInsets.top + measurements.itemSize.height + measurements.sectionInsets.bottom) | ||
| XCTAssertEqual(layout.collectionViewContentSize, expectedContentSize) | ||
| } | ||
|
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| func testHeaderViewLayout() { | ||
| measurements.sectionInsets = UIEdgeInsets(top: 5, left: 5, bottom: 0, right: 0) | ||
| measurements.headerSize = CGSize(width: 10, height: 25) | ||
| layout.prepare() | ||
| let headerAttributes = layout.layoutAttributesForSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, at: IndexPath(index: 0)) | ||
| XCTAssertEqual(headerAttributes?.representedElementKind, UICollectionView.elementKindSectionHeader) | ||
|
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| let expectedFrame = CGRect(x: 0, y: 0, width: collectionView.frame.size.width, height: measurements.headerSize.height) | ||
| XCTAssertEqual(headerAttributes?.frame, expectedFrame) | ||
|
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| let itemAttributes = layout.layoutAttributesForItem(at: IndexPath(row: 0, section: 0)) | ||
| XCTAssertEqual(itemAttributes?.frame.origin.y, measurements.headerSize.height + measurements.sectionInsets.top) | ||
| } | ||
|
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| func testFooterViewLayout() { | ||
| measurements.sectionInsets = UIEdgeInsets(top: 5, left: 5, bottom: 25, right: 0) | ||
| measurements.footerSize = CGSize(width: 10, height: 25) | ||
| layout.prepare() | ||
| let footerAttributes = layout.layoutAttributesForSupplementaryView(ofKind: UICollectionView.elementKindSectionFooter, at: IndexPath(index: 0)) | ||
| XCTAssertEqual(footerAttributes?.representedElementKind, UICollectionView.elementKindSectionFooter) | ||
|
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| let expectedFrame = CGRect(x: 0, | ||
| y: measurements.sectionInsets.top + measurements.itemSize.height + measurements.sectionInsets.bottom, | ||
| width: collectionView.frame.size.width, | ||
| height: measurements.footerSize.height) | ||
| XCTAssertEqual(footerAttributes?.frame, expectedFrame) | ||
| XCTAssertEqual(layout.collectionViewContentSize.height, measurements.sectionInsets.top + measurements.itemSize.height + measurements.sectionInsets.bottom + measurements.footerSize.height); | ||
| } | ||
| } | ||
|
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| extension LayoutMeasurements { | ||
| func numberOfSections(in collectionView: UICollectionView) -> Int { | ||
| return numberOfSections | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { | ||
| return numberOfItems | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { | ||
| return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { | ||
| return itemSize | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat { | ||
| return interItemSpacing | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { | ||
| return sectionInsets | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize { | ||
| return headerSize | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize { | ||
| return footerSize | ||
| } | ||
| } |