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48 lines
2.6 KiB
48 lines
2.6 KiB
2 years ago
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# ICallbacks
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An interface for receiving callbacks when running tests. All test runs invoke the callbacks until the next domain reload.
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The `RunStarted` method runs when the whole test run starts. Then the `TestStarted` method runs with information about the tests it is about to run on an assembly level. Afterward, it runs on a test fixture level and then on the individual test. If the test is a [parameterized test](./https://github.com/nunit/docs/wiki/Parameterized-Tests), then it is also invoked for each parameter combination. After each part of the test tree have completed running, the corresponding `TestFinished` method runs with the test result. At the end of the run, the `RunFinished` event runs with the test result.
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An extended version of the callback, [IErrorCallbacks](./reference-ierror-callbacks.md), extends this `ICallbacks` to receive calls when a run fails due to a build error.
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## Public methods
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| Syntax | Description |
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| ---------------------------------------------- | ------------------------------------------------------------ |
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| `void RunStarted(ITestAdaptor testsToRun)` | Invoked when the test run starts. The [ITestAdaptor](./reference-itest-adaptor.md) represents the tree of tests to run. |
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| `void RunFinished(ITestResultAdaptor result)` | Invoked when the test run finishes. The [ITestResultAdaptor](./reference-itest-result-adaptor.md) represents the results of the set of tests that have run. |
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| `void TestStarted(ITestAdaptor test)` | Invoked on each node of the test tree, as that part of the tree starts to run. |
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| `void TestFinished(ITestResultAdaptor result)` | Invoked on each node of the test tree once that part of the test tree has finished running. The [ITestResultAdaptor](./reference-itest-result-adaptor.md) represents the results of the current node of the test tree. |
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## Example
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An example that sets up a listener on the API. The listener prints the number of failed tests after the run has finished:
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``` C#
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public void SetupListeners()
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{
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var api = ScriptableObject.CreateInstance<TestRunnerApi>();
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api.RegisterCallbacks(new MyCallbacks());
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}
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private class MyCallbacks : ICallbacks
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{
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public void RunStarted(ITestAdaptor testsToRun)
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{
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}
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public void RunFinished(ITestResultAdaptor result)
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{
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Debug.Log(string.Format("Run finished {0} test(s) failed.", result.FailCount));
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}
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public void TestStarted(ITestAdaptor test)
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{
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}
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public void TestFinished(ITestResultAdaptor result)
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{
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}
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}
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```
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