Added CLIText.fatalError(String) API for tests

In different places (Main, TextBuiltin, CLIGitCommand) we report fatal
errors and at same time want to check for fatal errors in the tests.
Using common API simplifies the error testing and helps to navigate to
the actual error check implementation.

Change-Id: Iecde79beb33ea595171f168f46b0b10ab2f339bb
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/pgm/CLIGitCommand.java

@@ -44,7 +44,6 @@ package org.eclipse.jgit.pgm;
 
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -106,8 +105,7 @@ public class CLIGitCommand {
 		try {
 			return IO.readLines(new String(rawExecute(str, db)));
 		} catch (Die e) {
-			return IO.readLines(MessageFormat.format(CLIText.get().fatalError,
-					e.getMessage()));
+			return IO.readLines(CLIText.fatalError(e.getMessage()));
 		}
 	}
 

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/DescribeTest.java

@@ -43,6 +43,7 @@
 package org.eclipse.jgit.pgm;
 
 import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
@@ -50,6 +51,7 @@ import java.util.Arrays;
 
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.lib.CLIRepositoryTestCase;
+import org.eclipse.jgit.pgm.internal.CLIText;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -71,17 +73,15 @@ public class DescribeTest extends CLIRepositoryTestCase {
 
 	@Test
 	public void testNoHead() throws Exception {
-		assertArrayEquals(
-				new String[] { "fatal: No names found, cannot describe anything." },
-				executeUnchecked("git describe"));
+		assertEquals(CLIText.fatalError(CLIText.get().noNamesFound),
+				toString(executeUnchecked("git describe")));
 	}
 
 	@Test
 	public void testHeadNoTag() throws Exception {
 		git.commit().setMessage("initial commit").call();
-		assertArrayEquals(
-				new String[] { "fatal: No names found, cannot describe anything." },
-				executeUnchecked("git describe"));
+		assertEquals(CLIText.fatalError(CLIText.get().noNamesFound),
+				toString(executeUnchecked("git describe")));
 	}
 
 	@Test

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/MergeTest.java

@@ -50,6 +50,7 @@ import java.util.Iterator;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.lib.CLIRepositoryTestCase;
 import org.eclipse.jgit.merge.MergeStrategy;
+import org.eclipse.jgit.pgm.internal.CLIText;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.junit.Before;
 import org.junit.Test;
@@ -194,7 +195,8 @@ public class MergeTest extends CLIRepositoryTestCase {
 
 	@Test
 	public void testNoFastForwardAndSquash() throws Exception {
-		assertEquals("fatal: You cannot combine --squash with --no-ff.",
+		assertEquals(
+				CLIText.fatalError(CLIText.get().cannotCombineSquashWithNoff),
 				executeUnchecked("git merge master --no-ff --squash")[0]);
 	}
 
@@ -209,7 +211,7 @@ public class MergeTest extends CLIRepositoryTestCase {
 		git.add().addFilepattern("file").call();
 		git.commit().setMessage("commit#2").call();
 
-		assertEquals("fatal: Not possible to fast-forward, aborting.",
+		assertEquals(CLIText.fatalError(CLIText.get().ffNotPossibleAborting),
 				executeUnchecked("git merge master --ff-only")[0]);
 	}
 

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java

@@ -128,7 +128,7 @@ public class Main {
 		} catch (Die err) {
 			if (err.isAborted())
 				System.exit(1);
-			System.err.println(MessageFormat.format(CLIText.get().fatalError, err.getMessage()));
+			System.err.println(CLIText.fatalError(err.getMessage()));
 			if (showStackTrace)
 				err.printStackTrace();
 			System.exit(128);
@@ -147,10 +147,10 @@ public class Main {
 			}
 			if (!showStackTrace && err.getCause() != null
 					&& err instanceof TransportException)
-				System.err.println(MessageFormat.format(CLIText.get().fatalError, err.getCause().getMessage()));
+				System.err.println(CLIText.fatalError(err.getCause().getMessage()));
 
 			if (err.getClass().getName().startsWith("org.eclipse.jgit.errors.")) { //$NON-NLS-1$
-				System.err.println(MessageFormat.format(CLIText.get().fatalError, err.getMessage()));
+				System.err.println(CLIText.fatalError(err.getMessage()));
 				if (showStackTrace)
 					err.printStackTrace();
 				System.exit(128);
@@ -176,7 +176,7 @@ public class Main {
 			clp.parseArgument(argv);
 		} catch (CmdLineException err) {
 			if (argv.length > 0 && !help && !version) {
-				writer.println(MessageFormat.format(CLIText.get().fatalError, err.getMessage()));
+				writer.println(CLIText.fatalError(err.getMessage()));
 				writer.flush();
 				System.exit(1);
 			}

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/TextBuiltin.java

@@ -216,7 +216,7 @@ public abstract class TextBuiltin {
 		try {
 			clp.parseArgument(args);
 		} catch (CmdLineException err) {
-			this.errw.println(MessageFormat.format(CLIText.get().fatalError, err.getMessage()));
+			this.errw.println(CLIText.fatalError(err.getMessage()));
 			if (help) {
 				printUsage("", clp); //$NON-NLS-1$
 			}

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/internal/CLIText.java

@@ -74,6 +74,19 @@ public class CLIText extends TranslationBundle {
 		return MessageFormat.format(get().lineFormat, line);
 	}
 
+	/**
+	 * Format the given argument as fatal error using the format defined by
+	 * {@link #fatalError} ("fatal: " by default).
+	 *
+	 * @param message
+	 *            the message to format
+	 * @return the formatted line
+	 * @since 4.2
+	 */
+	public static String fatalError(String message) {
+		return MessageFormat.format(get().fatalError, message);
+	}
+
 	// @formatter:off
 	/***/ public String alreadyOnBranch;
 	/***/ public String alreadyUpToDate;