1 files changed, 108 insertions, 0 deletions
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FS_POSIXTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FS_POSIXTest.java
new file mode 100644
index 0000000000..5319f7edb6
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/FS_POSIXTest.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2019, Vishal Devgire <vishaldevgire@gmail.com> and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+package org.eclipse.jgit.util;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import org.eclipse.jgit.junit.MockSystemReader;
+import org.eclipse.jgit.lib.ConfigConstants;
+import org.eclipse.jgit.storage.file.FileBasedConfig;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class FS_POSIXTest {
+	private FileBasedConfig jgitConfig;
+
+	private FileBasedConfig systemConfig;
+
+	private FileBasedConfig userConfig;
+
+	private Path tmp;
+
+	@Before
+	public void setUp() throws Exception {
+		tmp = Files.createTempDirectory("jgit_test_");
+
+		MockSystemReader mockSystemReader = new MockSystemReader();
+		SystemReader.setInstance(mockSystemReader);
+
+		// Measure timer resolution before the test to avoid time critical tests
+		// are affected by time needed for measurement.
+		// The MockSystemReader must be configured first since we need to use
+		// the same one here
+		FS.getFileStoreAttributes(tmp.getParent());
+
+		jgitConfig = new FileBasedConfig(new File(tmp.toFile(), "jgitconfig"),
+				FS.DETECTED);
+		systemConfig = new FileBasedConfig(jgitConfig,
+				new File(tmp.toFile(), "systemgitconfig"), FS.DETECTED);
+		userConfig = new FileBasedConfig(systemConfig,
+				new File(tmp.toFile(), "usergitconfig"), FS.DETECTED);
+		// We have to set autoDetach to false for tests, because tests expect to
+		// be able to clean up by recursively removing the repository, and
+		// background GC might be in the middle of writing or deleting files,
+		// which would disrupt this.
+		userConfig.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
+				ConfigConstants.CONFIG_KEY_AUTODETACH, false);
+		userConfig.save();
+		mockSystemReader.setJGitConfig(jgitConfig);
+		mockSystemReader.setSystemGitConfig(systemConfig);
+		mockSystemReader.setUserGitConfig(userConfig);
+	}
+
+	@After
+	public void tearDown() throws IOException {
+		SystemReader.setInstance(null);
+		FileUtils.delete(tmp.toFile(), FileUtils.RECURSIVE | FileUtils.RETRY);
+	}
+
+	@Test
+	public void supportsAtomicCreateNewFile_shouldReturnSupportedAsDefault() {
+		assertTrue(new FS_POSIX().supportsAtomicCreateNewFile());
+	}
+
+	@Test
+	public void supportsAtomicCreateNewFile_shouldReturnTrueIfFlagIsSetInUserConfig() {
+		setAtomicCreateCreationFlag(userConfig, "true");
+		assertTrue(new FS_POSIX().supportsAtomicCreateNewFile());
+	}
+
+	@Test
+	public void supportsAtomicCreateNewFile_shouldReturnTrueIfFlagIsSetInSystemConfig() {
+		setAtomicCreateCreationFlag(systemConfig, "true");
+		assertTrue(new FS_POSIX().supportsAtomicCreateNewFile());
+	}
+
+	@Test
+	public void supportsAtomicCreateNewFile_shouldReturnFalseIfFlagUnsetInUserConfig() {
+		setAtomicCreateCreationFlag(userConfig, "false");
+		assertFalse(new FS_POSIX().supportsAtomicCreateNewFile());
+	}
+
+	@Test
+	public void supportsAtomicCreateNewFile_shouldReturnFalseIfFlagUnsetInSystemConfig() {
+		setAtomicCreateCreationFlag(systemConfig, "false");
+		assertFalse(new FS_POSIX().supportsAtomicCreateNewFile());
+	}
+
+	private void setAtomicCreateCreationFlag(FileBasedConfig config,
+			String value) {
+		config.setString(ConfigConstants.CONFIG_CORE_SECTION, null,
+				ConfigConstants.CONFIG_KEY_SUPPORTSATOMICFILECREATION, value);
+	}
+}