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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.base.test; |
| 6 |
| 7 import android.support.test.InstrumentationRegistry; |
| 8 import android.support.test.uiautomator.UiDevice; |
| 9 |
| 10 import org.junit.runners.model.Statement; |
| 11 |
| 12 import org.chromium.base.CommandLine; |
| 13 import org.chromium.base.Log; |
| 14 import org.chromium.base.test.util.UrlUtils; |
| 15 |
| 16 import java.io.File; |
| 17 |
| 18 /** |
| 19 * Statement that captures screenshots if |base| statement fails. |
| 20 * |
| 21 * If --screenshot-path commandline flag is given, this |Statement| |
| 22 * will save a screenshot to the specified path in the case of a test failure. |
| 23 */ |
| 24 public class ScreenshotOnFailureStatement extends Statement { |
| 25 private static final String TAG = "ScreenshotOnFail"; |
| 26 |
| 27 private final Statement mBase; |
| 28 |
| 29 public ScreenshotOnFailureStatement(final Statement base) { |
| 30 mBase = base; |
| 31 } |
| 32 |
| 33 @Override |
| 34 public void evaluate() throws Throwable { |
| 35 try { |
| 36 mBase.evaluate(); |
| 37 } catch (Throwable e) { |
| 38 takeScreenshot(); |
| 39 throw e; |
| 40 } |
| 41 } |
| 42 |
| 43 private void takeScreenshot() { |
| 44 String screenshotRelativeFilePath = CommandLine.isInitialized() |
| 45 ? CommandLine.getInstance().getSwitchValue("screenshot-file") |
| 46 : null; |
| 47 if (screenshotRelativeFilePath == null) { |
| 48 Log.d(TAG, |
| 49 "Did not save screenshot of failure. Must specify --screensh
ot-file " |
| 50 + "command-line flag to enable this feature."); |
| 51 return; |
| 52 } |
| 53 |
| 54 UiDevice uiDevice = UiDevice.getInstance(InstrumentationRegistry.getInst
rumentation()); |
| 55 File screenshotFile = new File(UrlUtils.getTestFileOutputPath(screenshot
RelativeFilePath)); |
| 56 File screenshotDir = screenshotFile.getParentFile(); |
| 57 if (screenshotDir == null) { |
| 58 Log.d(TAG, |
| 59 String.format( |
| 60 "Failed to create parent directory for %s. Can't sav
e screenshot.", |
| 61 screenshotFile)); |
| 62 return; |
| 63 } |
| 64 if (!screenshotDir.exists()) { |
| 65 if (!screenshotDir.mkdirs()) { |
| 66 Log.d(TAG, |
| 67 String.format( |
| 68 "Failed to create %s. Can't save screenshot.", s
creenshotDir)); |
| 69 return; |
| 70 } |
| 71 } |
| 72 Log.d(TAG, String.format("Saving screenshot of test failure, %s", screen
shotFile)); |
| 73 uiDevice.takeScreenshot(screenshotFile); |
| 74 } |
| 75 } |
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