lambda -> meth ref: reject replacements with invalid qualifiers (IDEA-142695)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/lambda2methodReference/beforeMethodFromAnonymousClass.java

@@ -0,0 +1,39 @@
+// "Replace lambda with method reference" "false"
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+class Test {
+  
+  public static void main(String[] args) {
+    List<String> l = Arrays.asList("America", "Britain", "Australia", "Brazil", "Canada");
+    System.out.println(l);
+    System.out.println(uniquifyListByProperty(l, Function.identity()));
+    System.out.println(uniquifyListByProperty(l, s -> s.charAt(0)));
+  }
+
+  static <T, P> List<T> uniquifyListByProperty(List<T> list, Function<T, P> propertyExtractor) {
+    return list.stream()
+      .map(item -> new Object() {
+        @Override
+        public boolean equals(Object o) {
+          return propertyExtractor.apply(item).equals(
+            propertyExtractor.apply(this.getClass().cast(o).item()));
+        }
+
+        @Override
+        public int hashCode() {
+          return propertyExtractor.apply(item).hashCode();
+        }
+
+        T item() {
+          return item;
+        }
+      })
+      .distinct()
+      .map(o -> o.<caret>item())
+      .collect(Collectors.toList());
+  }
+}