Add test infrastructure for tests that use logging and mocking

Change-Id: I5a38a5fd3256ca05e91d234c2bec7d18c06a75a2

gerrit-server/src/test/java/com/google/gerrit/testutil/SetMatcher.java

@@ -0,0 +1,55 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.testutil;
+
+import com.google.common.collect.Sets;
+
+import org.easymock.EasyMock;
+import org.easymock.IArgumentMatcher;
+
+import java.util.Set;
+
+/**
+ * Match for Iterables via set equals
+ *
+ * Converts both expected and actual parameter to a set and compares those two
+ * sets via equals to determine whether or not they match.
+ */
+public class SetMatcher<T> implements IArgumentMatcher {
+  public static <S extends Iterable<T>,T> S setEq(S expected) {
+    EasyMock.reportMatcher(new SetMatcher<T>(expected));
+    return null;
+  }
+
+  Set<T> expected;
+
+  public SetMatcher(Iterable<T> expected) {
+    this.expected = Sets.newHashSet(expected);
+  }
+
+  @Override
+  public boolean matches(Object actual) {
+    if (actual instanceof Iterable<?>) {
+      Set<?> actualSet = Sets.newHashSet((Iterable<?>)actual);
+      return expected.equals(actualSet);
+    }
+    return false;
+  }
+
+  @Override
+  public void appendTo(StringBuffer buffer) {
+    buffer.append(expected);
+  }
+}