type equality constraint: accept unbounded/extends wildcards pair; reject unbounded/super

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/constraints/EqualityUnboundWildcard.java

@@ -0,0 +1,37 @@
+public class SampleExtendsWildcard {
+  public void highlightsTheBug(Stream<String> stream) {
+    stream.flatMap((Block<?> sink, String element) -> {});
+  }
+
+  public interface Block<B> {
+    void apply(B t);
+  }
+
+  public interface Stream<S> {
+    <R> Stream<R> flatMap(FlatMapper<? super S, R> mapper);
+
+  }
+
+  public interface FlatMapper<F, R> {
+    void flatMapInto(Block<? extends R> sink, F element);
+  }
+}
+
+class SampleSuperWildcard {
+  public void highlightsTheBug(Stream<String> stream) {
+    stream.flatMap((<error descr="Incompatible parameter types in lambda expression">Block<?> sink</error>, String element) -> {});
+  }
+
+  public interface Block<B> {
+    void apply(B t);
+  }
+
+  public interface Stream<S> {
+    <R> Stream<R> flatMap(FlatMapper<? super S, R> mapper);
+
+  }
+
+  public interface FlatMapper<F, R> {
+    void flatMapInto(Block<? super R> sink, F element);
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/ConstraintsInferenceMiscTest.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * 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.intellij.codeInsight.daemon.lambda;
+
+import com.intellij.codeInsight.daemon.LightDaemonAnalyzerTestCase;
+import com.intellij.openapi.projectRoots.Sdk;
+import com.intellij.testFramework.IdeaTestUtil;
+import org.jetbrains.annotations.NonNls;
+
+/**
+ * Created by anna on 1/31/14.
+ */
+public class ConstraintsInferenceMiscTest extends LightDaemonAnalyzerTestCase {
+  @NonNls static final String BASE_PATH = "/codeInsight/daemonCodeAnalyzer/lambda/constraints";
+
+  public void testEqualityUnboundWildcard() throws Exception {
+    doTest(false);
+  }
+
+  private void doTest(final boolean checkWarnings) {
+    doTestNewInference(BASE_PATH + "/" + getTestName(false) + ".java", checkWarnings, false);
+  }
+
+  @Override
+  protected Sdk getProjectJDK() {
+    return IdeaTestUtil.getMockJdk18();
+  }
+}