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DemoApp/DemoApp.xcodeproj/xcshareddata/xcschemes/DemoApp.xcscheme
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DemoApp/DemoApp.xcodeproj/xcshareddata/xcschemes/DemoAppTests.xcscheme
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Examples/DemoApp/DemoApp/TestViews/ScrollingTextView.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| // | ||
| // ScrollingTextView.swift | ||
| // DemoApp | ||
| // | ||
| // Created by Noah Martin on 8/24/24. | ||
| // | ||
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| import Foundation | ||
| import SwiftUI | ||
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| struct ScrollingTextView: NSViewRepresentable { | ||
| func makeNSView(context: Context) -> some NSView { | ||
| let textView = NSTextView() | ||
| textView.string = "test" | ||
| let scrollView = NSScrollView() | ||
| scrollView.documentView = textView | ||
| return scrollView | ||
| } | ||
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| func updateNSView(_ nsView: NSViewType, context: Context) { } | ||
| } | ||
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| struct ScrollingTextView_Previews: PreviewProvider { | ||
| static var previews: some View { | ||
| ScrollingTextView() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| # Unit Test Migration | ||
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| This example shows how to migrate from swift-snapshot-testing to preview providers. The example app contains a unit test target `UnitTestMigrationTests` with one [snapshot test](https://github.com/EmergeTools/SnapshotPreviews-iOS/blob/main/Examples/UnitTestMigration/UnitTestMigrationTests/ExampleSnapshotTest.swift). It has been migrated by copying/pasting the file into the main app target as [ExampleSnapshotTest_Migrated.swift](https://github.com/EmergeTools/SnapshotPreviews-iOS/blob/main/Examples/UnitTestMigration/UnitTestMigration/ExampleSnapshotTest_Migrated.swift). The test is modified by removing the XCTest/SnapshotTesting importants, changing the base class to `SnapshotTest` and adding the conformance to `PreviewProvider`. | ||
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| ## Migrating your own tests | ||
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| 1. Add the file [SnapshotTest.swift](https://github.com/EmergeTools/SnapshotPreviews-iOS/blob/main/Examples/UnitTestMigration/UnitTestMigration/SnapshotTest.swift) to your app, this does the heavy lifting of converting snapshot test function calls into previews. | ||
| 2. Copy your test file from the unit test target to your application. | ||
| 3. Remove imports of `XCTest` and `SnapshotTesting`. | ||
| 4. Change the base class from `XCTestCase` to `SnapshotTest` and add a conformce to `PreviewProvider`. | ||
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| Here’s a complete example of a migrated test: | ||
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| ```swift | ||
| import SwiftUI | ||
|
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| // Add the conformance to `PreviewProvider` when extending `SnapshotTest` | ||
| // The `SnapshotTest` base class automatically handles turning calls to | ||
| // assertSnapshot into previews. | ||
| class ExampleSnapshotTest: SnapshotTest, PreviewProvider { | ||
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| func testContentViewSnapshot() { | ||
| assertSnapshot(of: ContentView(), as: .image) | ||
| } | ||
| } | ||
| ``` |
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