1 files changed, 67 insertions, 0 deletions
diff --git a/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/DiffTest.java b/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/DiffTest.java
new file mode 100644
index 0000000000..859b54de4d
--- /dev/null
+++ b/org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/DiffTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022, Matthias Sohn <matthias.sohn@sap.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.pgm;
+
+import static org.junit.Assert.assertEquals;
+
+import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.junit.Before;
+import org.junit.Test;
+
+public class DiffTest extends CLIRepositoryTestCase {
+
+	private static final String NO_NEWLINE = "\\ No newline at end of file";
+
+	@Before
+	public void setup() throws Exception {
+		writeTrashFile("a", "a");
+		execute("git add a");
+		execute("git commit -m added");
+	}
+
+	@Test
+	public void testDiffCommitNewFile() throws Exception {
+		writeTrashFile("a1", "a");
+		String result = toString(execute("git diff"));
+		assertEquals(
+				toString("diff --git a/a1 b/a1", "new file mode 100644",
+						"index 0000000..2e65efe", "--- /dev/null", "+++ b/a1",
+						"@@ -0,0 +1 @@", "+a", NO_NEWLINE),
+				result);
+	}
+
+	@Test
+	public void testDiffCommitModifiedFile() throws Exception {
+		writeTrashFile("a", "a1");
+		String result = toString(execute("git diff"));
+		assertEquals(
+				toString("diff --git a/a b/a", "index 2e65efe..59ef8d1 100644",
+						"--- a/a", "+++ b/a", "@@ -1 +1 @@",
+						"-a", NO_NEWLINE, "+a1", NO_NEWLINE),
+				result);
+	}
+
+	@Test
+	public void testDiffCommitModifiedFileNameOnly() throws Exception {
+		writeTrashFile("a", "a1");
+		writeTrashFile("b", "b");
+		String result = toString(execute("git diff --name-only"));
+		assertEquals(toString("a", "b"), result);
+	}
+
+	@Test
+	public void testDiffCommitModifiedFileNameStatus() throws Exception {
+		writeTrashFile("a", "a1");
+		writeTrashFile("b", "b");
+		String result = toString(execute("git diff --name-status"));
+		assertEquals(toString("M\ta", "A\tb"), result);
+	}
+}