Log actual errors instead of only number in ProcessConsoleTests #1033

The ProcessConsoleTests are randomly failing because some error is
logged during test execution. The error message does, however, only
contain the number of logged errors, but not the error itself. With this
change, actual errors are stored and output rather than only their
number.

Contributes to
#1033

debug/org.eclipse.debug.tests/src/org/eclipse/debug/tests/console/ProcessConsoleTests.java

@@ -14,6 +14,7 @@
 package org.eclipse.debug.tests.console;
 
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
@@ -32,12 +33,13 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Function;
 import java.util.function.Predicate;
+
 import org.eclipse.core.runtime.ILogListener;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
@@ -74,15 +76,15 @@
  */
 public class ProcessConsoleTests extends AbstractDebugTest {
 	/**
-	 * Number of received log messages with severity error while running a
-	 * single test method.
+	 * Log messages with severity error received while running a single test
+	 * method.
 	 */
-	private final AtomicInteger loggedErrors = new AtomicInteger(0);
+	private final List<IStatus> loggedErrors = Collections.synchronizedList(new ArrayList<>());
 
 	/** Listener to count error messages in {@link ConsolePlugin} log. */
 	private final ILogListener errorLogListener = (status, plugin) -> {
 			if (status.matches(IStatus.ERROR)) {
-				loggedErrors.incrementAndGet();
+				loggedErrors.add(status);
 			}
 	};
 
@@ -93,7 +95,7 @@ public class ProcessConsoleTests extends AbstractDebugTest {
 	@Before
 	public void setUp() throws Exception {
 		super.setUp();
-		loggedErrors.set(0);
+		loggedErrors.clear();
 		Platform.addLogListener(errorLogListener);
 	}
 
@@ -108,7 +110,7 @@ public void tearDown() throws Exception {
 
 		super.tearDown();
 
-		assertEquals("Test triggered errors.", 0, loggedErrors.get());
+		assertThat("Test triggered errors.", loggedErrors, empty());
 	}
 
 	/**