Make sure tests don't blindly continue if a command is "silently" failed

Make the default execute() function fail fast on first command printed
"fatal: " to output.

Introduced executeUnchecked() for few tests which wanted to test fatal
output.

Change-Id: I5b09aad9443515636811fc4d00bf8b8b9587a626
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java

@@ -48,11 +48,13 @@ import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import org.eclipse.jgit.junit.JGitTestUtil;
 import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
 import org.eclipse.jgit.pgm.CLIGitCommand;
+import org.eclipse.jgit.pgm.Die;
 import org.junit.Before;
 
 public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
@@ -79,7 +81,7 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 	 * @return command output
 	 * @throws Exception
 	 */
-	protected String[] execute(String... cmds) throws Exception {
+	protected String[] executeUnchecked(String... cmds) throws Exception {
 		List<String> result = new ArrayList<String>(cmds.length);
 		for (String cmd : cmds) {
 			result.addAll(CLIGitCommand.execute(cmd, db));
@@ -87,6 +89,28 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 		return result.toArray(new String[0]);
 	}
 
+	/**
+	 * Executes specified git commands (with arguments), throws exception and
+	 * stops execution on first command which output contains a 'fatal:' error
+	 *
+	 * @param cmds
+	 *            each string argument must be a valid git command line, e.g.
+	 *            "git branch -h"
+	 * @return command output
+	 * @throws Exception
+	 */
+	protected String[] execute(String... cmds) throws Exception {
+		List<String> result = new ArrayList<String>(cmds.length);
+		for (String cmd : cmds) {
+			List<String> out = CLIGitCommand.execute(cmd, db);
+			if (contains(out, "fatal: ")) {
+				throw new Die(toString(out));
+			}
+			result.addAll(out);
+		}
+		return result.toArray(new String[0]);
+	}
+
 	/**
 	 * @param link
 	 *            the path of the symbolic link to create
@@ -196,15 +220,32 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 	}
 
 	protected void assertArrayOfLinesEquals(String[] expected, String[] actual) {
-		assertEquals(toText(expected), toText(actual));
+		assertEquals(toString(expected), toString(actual));
 	}
 
-	private static String toText(String[] lines) {
+	public static String toString(String[] lines) {
+		return toString(Arrays.asList(lines));
+	}
+
+	public static String toString(List<String> lines) {
 		StringBuilder b = new StringBuilder();
 		for (String s : lines) {
+			if (s != null && !s.isEmpty()) {
 				b.append(s);
+				if (!s.endsWith("\n")) {
 					b.append('\n');
 				}
+			}
+		}
 		return b.toString();
 	}
+
+	public static boolean contains(List<String> lines, String str) {
+		for (String s : lines) {
+			if (s.contains(str)) {
+				return true;
+			}
+		}
+		return false;
+	}
 }

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

@@ -65,7 +65,7 @@ public class AddTest extends CLIRepositoryTestCase {
 	@Test
 	public void testAddNothing() throws Exception {
 		assertEquals("fatal: Argument \"filepattern\" is required", //
-				execute("git add")[0]);
+				executeUnchecked("git add")[0]);
 	}
 
 	@Test

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

@@ -102,7 +102,8 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 	@Test
 	public void testUnrecognizedFormat() throws Exception {
 		String[] expect = new String[] { "fatal: Unknown archive format 'nonsense'" };
-		String[] actual = execute("git archive --format=nonsense " + emptyTree);
+		String[] actual = executeUnchecked(
+				"git archive --format=nonsense " + emptyTree);
 		assertArrayEquals(expect, actual);
 	}
 

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

@@ -89,6 +89,6 @@ public class BranchTest extends CLIRepositoryTestCase {
 	@Test
 	public void testExistingBranch() throws Exception {
 		assertEquals("fatal: A branch named 'master' already exists.",
-				execute("git branch master")[0]);
+				executeUnchecked("git branch master")[0]);
 	}
 }

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

@@ -109,13 +109,13 @@ public class CheckoutTest extends CLIRepositoryTestCase {
 
 		assertStringArrayEquals(
 				"fatal: A branch named 'master' already exists.",
-				execute("git checkout -b master"));
+				executeUnchecked("git checkout -b master"));
 	}
 
 	@Test
 	public void testCheckoutNewBranchOnBranchToBeBorn() throws Exception {
 		assertStringArrayEquals("fatal: You are on a branch yet to be born",
-				execute("git checkout -b side"));
+				executeUnchecked("git checkout -b side"));
 	}
 
 	@Test

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

@@ -98,16 +98,4 @@ public class CommitTest extends CLIRepositoryTestCase {
 				result.trim().equals("On branch master"));
 	}
 
-	String toString(String[] arr) {
-		StringBuilder sb = new StringBuilder();
-		for (String s : arr) {
-			if (s != null && !s.isEmpty()) {
-				sb.append(s);
-				if (!s.endsWith("\n")) {
-					sb.append('\n');
-				}
-			}
-		}
-		return sb.toString();
-	}
 }

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

@@ -73,7 +73,7 @@ public class DescribeTest extends CLIRepositoryTestCase {
 	public void testNoHead() throws Exception {
 		assertArrayEquals(
 				new String[] { "fatal: No names found, cannot describe anything." },
-				execute("git describe"));
+				executeUnchecked("git describe"));
 	}
 
 	@Test
@@ -81,7 +81,7 @@ public class DescribeTest extends CLIRepositoryTestCase {
 		git.commit().setMessage("initial commit").call();
 		assertArrayEquals(
 				new String[] { "fatal: No names found, cannot describe anything." },
-				execute("git describe"));
+				executeUnchecked("git describe"));
 	}
 
 	@Test
@@ -119,7 +119,7 @@ public class DescribeTest extends CLIRepositoryTestCase {
 
 	@Test
 	public void testHelpArgumentAfterUnknown() throws Exception {
-		String[] output = execute("git describe -XYZ -h");
+		String[] output = executeUnchecked("git describe -XYZ -h");
 		String all = Arrays.toString(output);
 		assertTrue("Unexpected help output: " + all,
 				all.contains("jgit describe"));

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

@@ -195,7 +195,7 @@ public class MergeTest extends CLIRepositoryTestCase {
 	@Test
 	public void testNoFastForwardAndSquash() throws Exception {
 		assertEquals("fatal: You cannot combine --squash with --no-ff.",
-				execute("git merge master --no-ff --squash")[0]);
+				executeUnchecked("git merge master --no-ff --squash")[0]);
 	}
 
 	@Test
@@ -210,7 +210,7 @@ public class MergeTest extends CLIRepositoryTestCase {
 		git.commit().setMessage("commit#2").call();
 
 		assertEquals("fatal: Not possible to fast-forward, aborting.",
-				execute("git merge master --ff-only")[0]);
+				executeUnchecked("git merge master --ff-only")[0]);
 	}
 
 	@Test

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

@@ -103,7 +103,7 @@ public class RepoTest extends CLIRepositoryTestCase {
 	@Test
 	public void testMissingPath() throws Exception {
 		assertEquals("fatal: Argument \"path\" is required",
-				execute("git repo")[0]);
+				executeUnchecked("git repo")[0]);
 	}
 
 	/**

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

@@ -68,6 +68,6 @@ public class TagTest extends CLIRepositoryTestCase {
 		git.commit().setMessage("commit").call();
 
 		assertEquals("fatal: tag 'test' already exists",
-				execute("git tag test")[0]);
+				executeUnchecked("git tag test")[0]);
 	}
 }