lambda: smart completion: substitute return type; respect one line lambda as return statement (IDEA-90941; IDEA-90944)

java/java-tests/testData/codeInsight/completion/smartType/ExpectedReturnType1-out.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2000-2012 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.
+ */
+interface I {
+  boolean foo(String s);
+}
+public class Test {
+  public int m() {
+    I i = s -> s.contains();
+    return 0;
+  }
+}

java/java-tests/testData/codeInsight/completion/smartType/ExpectedReturnType1.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2000-2012 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.
+ */
+interface I {
+  boolean foo(String s);
+}
+public class Test {
+  public int m() {
+    I i = s -> s.<caret>
+    return 0;
+  }
+}

java/java-tests/testData/codeInsight/completion/smartType/ExpectedReturnTypeWithSubstitution.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2000-2012 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.
+ */
+public class Test {
+  public interface Some<T> {
+    T test(T p1, T p2);
+  }
+
+  class Foo {
+    public Foo create() {return null;}
+    public Foo create1() {return null;}
+  }
+
+  {
+    Some<Foo> some = (i1, i2) -> {
+      return i1.<caret>
+    };
+  }
+}