1 files changed, 128 insertions, 0 deletions
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/diffmergetool/ExternalToolTestCase.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/diffmergetool/ExternalToolTestCase.java
new file mode 100644
index 0000000000..7a6ff46578
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/diffmergetool/ExternalToolTestCase.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2020-2021, Simeon Andreev <simeon.danailov.andreev@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.internal.diffmergetool;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jgit.junit.RepositoryTestCase;
+import org.eclipse.jgit.util.FS;
+import org.eclipse.jgit.util.FS_POSIX;
+import org.junit.After;
+import org.junit.Assume;
+import org.junit.Before;
+
+/**
+ * Base test case for external merge and diff tool tests.
+ */
+public abstract class ExternalToolTestCase extends RepositoryTestCase {
+
+	protected static final String DEFAULT_CONTENT = "line1";
+
+	protected File localFile;
+
+	protected File remoteFile;
+
+	protected File mergedFile;
+
+	protected File baseFile;
+
+	protected File commandResult;
+
+	protected FileElement local;
+
+	protected FileElement remote;
+
+	protected FileElement merged;
+
+	protected FileElement base;
+
+	@Before
+	@Override
+	public void setUp() throws Exception {
+		super.setUp();
+
+		localFile = writeTrashFile("localFile.txt", DEFAULT_CONTENT + "\n");
+		localFile.deleteOnExit();
+		remoteFile = writeTrashFile("remoteFile.txt", DEFAULT_CONTENT + "\n");
+		remoteFile.deleteOnExit();
+		mergedFile = writeTrashFile("mergedFile.txt", "");
+		mergedFile.deleteOnExit();
+		baseFile = writeTrashFile("baseFile.txt", "");
+		baseFile.deleteOnExit();
+		commandResult = writeTrashFile("commandResult.txt", "");
+		commandResult.deleteOnExit();
+
+		local = new FileElement(localFile.getAbsolutePath(),
+				FileElement.Type.LOCAL);
+		remote = new FileElement(remoteFile.getAbsolutePath(),
+				FileElement.Type.REMOTE);
+		merged = new FileElement(mergedFile.getAbsolutePath(),
+				FileElement.Type.MERGED);
+		base = new FileElement(baseFile.getAbsolutePath(),
+				FileElement.Type.BASE);
+	}
+
+	@After
+	@Override
+	public void tearDown() throws Exception {
+		Files.delete(localFile.toPath());
+		Files.delete(remoteFile.toPath());
+		Files.delete(mergedFile.toPath());
+		Files.delete(baseFile.toPath());
+		Files.delete(commandResult.toPath());
+
+		super.tearDown();
+	}
+
+
+	protected static void assumePosixPlatform() {
+		Assume.assumeTrue(
+				"This test can run only in Linux tests",
+				FS.DETECTED instanceof FS_POSIX);
+	}
+
+	protected static class PromptHandler implements PromptContinueHandler {
+
+		private final boolean promptResult;
+
+		final List<String> toolPrompts = new ArrayList<>();
+
+		private PromptHandler(boolean promptResult) {
+			this.promptResult = promptResult;
+		}
+
+		static PromptHandler acceptPrompt() {
+			return new PromptHandler(true);
+		}
+
+		static PromptHandler cancelPrompt() {
+			return new PromptHandler(false);
+		}
+
+		@Override
+		public boolean prompt(String toolName) {
+			toolPrompts.add(toolName);
+			return promptResult;
+		}
+	}
+
+	protected static class MissingToolHandler implements InformNoToolHandler {
+
+		final List<String> missingTools = new ArrayList<>();
+
+		@Override
+		public void inform(List<String> toolNames) {
+			missingTools.addAll(toolNames);
+		}
+	}
+}