Merge "Add tests for AtomicFile compatibility behaviors." into rvc-dev am: 6b98402100 (76991ed2) · Commits · e / os / android_frameworks_base

core/tests/utiltests/src/android/util/AtomicFileTest.java

+59 −2

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		package android.util;

		import static org.junit.Assert.assertArrayEquals;
		import static org.junit.Assert.assertTrue;

		import android.app.Instrumentation;
		import android.content.Context;
		@@ -45,11 +46,14 @@ public class AtomicFileTest {
		private static final String BASE_NAME = "base";
		private static final String NEW_NAME = BASE_NAME + ".new";
		private static final String LEGACY_BACKUP_NAME = BASE_NAME + ".bak";
		// The string isn't actually used, but we just need a different identifier.
		private static final String BASE_NAME_DIRECTORY = BASE_NAME + ".dir";

		private enum WriteAction {
		FINISH,
		FAIL,
		ABORT
		ABORT,
		READ_FINISH
		}

		private static final byte[] BASE_BYTES = "base".getBytes(StandardCharsets.UTF_8);
		@@ -82,6 +86,7 @@ public class AtomicFileTest {
		@Parameterized.Parameters(name = "{0}")
		public static Object[][] data() {
		return new Object[][] {
		// Standard tests.
		{ "none + none = none", null, null, null },
		{ "none + finish = new", null, WriteAction.FINISH, NEW_BYTES },
		{ "none + fail = none", null, WriteAction.FAIL, null },
		@@ -140,6 +145,50 @@ public class AtomicFileTest {
		{ "base & new & bak + abort = bak",
		new String[] { BASE_NAME, NEW_NAME, LEGACY_BACKUP_NAME }, WriteAction.ABORT,
		LEGACY_BACKUP_BYTES },
		// Compatibility when there is a directory in the place of base file, by replacing
		// no base with base.dir.
		{ "base.dir + none = none", new String[] { BASE_NAME_DIRECTORY }, null, null },
		{ "base.dir + finish = new", new String[] { BASE_NAME_DIRECTORY },
		WriteAction.FINISH, NEW_BYTES },
		{ "base.dir + fail = none", new String[] { BASE_NAME_DIRECTORY }, WriteAction.FAIL,
		null },
		{ "base.dir + abort = none", new String[] { BASE_NAME_DIRECTORY },
		WriteAction.ABORT, null },
		{ "base.dir & new + none = none", new String[] { BASE_NAME_DIRECTORY, NEW_NAME },
		null, null },
		{ "base.dir & new + finish = new", new String[] { BASE_NAME_DIRECTORY, NEW_NAME },
		WriteAction.FINISH, NEW_BYTES },
		{ "base.dir & new + fail = none", new String[] { BASE_NAME_DIRECTORY, NEW_NAME },
		WriteAction.FAIL, null },
		{ "base.dir & new + abort = none", new String[] { BASE_NAME_DIRECTORY, NEW_NAME },
		WriteAction.ABORT, null },
		{ "base.dir & bak + none = bak",
		new String[] { BASE_NAME_DIRECTORY, LEGACY_BACKUP_NAME }, null,
		LEGACY_BACKUP_BYTES },
		{ "base.dir & bak + finish = new",
		new String[] { BASE_NAME_DIRECTORY, LEGACY_BACKUP_NAME },
		WriteAction.FINISH, NEW_BYTES },
		{ "base.dir & bak + fail = bak",
		new String[] { BASE_NAME_DIRECTORY, LEGACY_BACKUP_NAME }, WriteAction.FAIL,
		LEGACY_BACKUP_BYTES },
		{ "base.dir & bak + abort = bak",
		new String[] { BASE_NAME_DIRECTORY, LEGACY_BACKUP_NAME }, WriteAction.ABORT,
		LEGACY_BACKUP_BYTES },
		{ "base.dir & new & bak + none = bak",
		new String[] { BASE_NAME_DIRECTORY, NEW_NAME, LEGACY_BACKUP_NAME }, null,
		LEGACY_BACKUP_BYTES },
		{ "base.dir & new & bak + finish = new",
		new String[] { BASE_NAME_DIRECTORY, NEW_NAME, LEGACY_BACKUP_NAME },
		WriteAction.FINISH, NEW_BYTES },
		{ "base.dir & new & bak + fail = bak",
		new String[] { BASE_NAME_DIRECTORY, NEW_NAME, LEGACY_BACKUP_NAME },
		WriteAction.FAIL, LEGACY_BACKUP_BYTES },
		{ "base.dir & new & bak + abort = bak",
		new String[] { BASE_NAME_DIRECTORY, NEW_NAME, LEGACY_BACKUP_NAME },
		WriteAction.ABORT, LEGACY_BACKUP_BYTES },
		// Compatibility when openRead() is called between startWrite() and finishWrite() -
		// the write should still succeed if it's the first write.
		{ "none + read & finish = new", null, WriteAction.READ_FINISH, NEW_BYTES },
		};
		}

		@@ -165,6 +214,9 @@ public class AtomicFileTest {
		case LEGACY_BACKUP_NAME:
		writeBytes(mLegacyBackupFile, LEGACY_BACKUP_BYTES);
		break;
		case BASE_NAME_DIRECTORY:
		assertTrue(mBaseFile.mkdir());
		break;
		default:
		throw new AssertionError(fileName);
		}
		@@ -185,6 +237,11 @@ public class AtomicFileTest {
		case ABORT:
		// Neither finishing nor failing is called upon abort.
		break;
		case READ_FINISH:
		// We are only using this action when there is no base file.
		assertThrows(FileNotFoundException.class, atomicFile::openRead);
		atomicFile.finishWrite(outputStream);
		break;
		default:
		throw new AssertionError(mWriteAction);
		}
		@@ -196,7 +253,7 @@ public class AtomicFileTest {
		assertArrayEquals(mExpectedBytes, readAllBytes(inputStream));
		}
		} else {
		assertThrows(FileNotFoundException.class, () -> atomicFile.openRead());
		assertThrows(FileNotFoundException.class, atomicFile::openRead);
		}
		}