Log preference changes for missing_default_api_profile during DependentUsageTests

See: #669

Author: trancexpress

apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/usage/DependentUsageTests.java

@@ -14,9 +14,16 @@
 package org.eclipse.pde.api.tools.builder.tests.usage;
 
 import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
+import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
+import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.pde.api.tools.internal.problems.ApiProblemFactory;
+import org.eclipse.pde.api.tools.internal.provisional.ApiPlugin;
 import org.eclipse.pde.api.tools.internal.provisional.descriptors.IElementDescriptor;
 import org.eclipse.pde.api.tools.internal.provisional.problems.IApiProblem;
+import org.eclipse.pde.api.tools.internal.provisional.problems.IApiProblemTypes;
 import org.eclipse.pde.api.tools.model.tests.TestSuiteHelper;
 
 import junit.framework.Test;
@@ -30,6 +37,8 @@
  */
 public class DependentUsageTests extends UsageTest {
 
+	private static final IPreferenceChangeListener PREFERENCE_LISTENER = new PreferenceListener();
+
 	static final String WITHOUTTAG = "withouttag"; //$NON-NLS-1$
 	static final String WITHTAG = "withtag"; //$NON-NLS-1$
 	static final IPath C_PATH = IPath.fromOSString("/refproject/src/c/"); //$NON-NLS-1$
@@ -47,6 +56,21 @@ public static Test suite() {
 		return buildTestSuite(DependentUsageTests.class);
 	}
 
+	@Override
+	protected void setUp() throws Exception {
+		super.setUp();
+		InstanceScope.INSTANCE.getNode(ApiPlugin.PLUGIN_ID).addPreferenceChangeListener(PREFERENCE_LISTENER);
+	}
+
+	@Override
+	protected void tearDown() throws Exception {
+		try {
+			InstanceScope.INSTANCE.getNode(ApiPlugin.PLUGIN_ID).removePreferenceChangeListener(PREFERENCE_LISTENER);
+		} finally {
+			super.tearDown();
+		}
+	}
+
 	@Override
 	protected int getDefaultProblemId() {
 		return 0;
@@ -461,4 +485,18 @@ private void test12(boolean addtag) throws Exception {
 			});
 		deployTest("test12", XYZ_PATH, MPPATH, "mpClassRef.java", addtag); //$NON-NLS-1$ //$NON-NLS-2$
 	}
+
+	private static class PreferenceListener implements IPreferenceChangeListener {
+		@Override
+		public void preferenceChange(PreferenceChangeEvent event) {
+			String key = event.getKey();
+			Object value = event.getNewValue();
+			if (IApiProblemTypes.MISSING_DEFAULT_API_BASELINE.equals(key) && !ApiPlugin.VALUE_IGNORE.equals(value)) {
+				String message = "Value of \"" + IApiProblemTypes.MISSING_DEFAULT_API_BASELINE + "\" set to: " + value; //$NON-NLS-1$//$NON-NLS-2$
+				IStatus info = new Status(IStatus.INFO, ApiPlugin.PLUGIN_ID, message,
+						new RuntimeException("stack trace info")); //$NON-NLS-1$
+				ApiPlugin.log(info);
+			}
+		}
+	}
 }