IDEA-163062 [Java8][Feature] Function.identity() inspection

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/lambda2methodCall/afterEquals.java

@@ -0,0 +1,17 @@
+// "Replace lambda expression with 'Predicate.isEqual()'" "true"
+import java.util.Objects;
+import java.util.Optional;
+import java.util.function.Predicate;
+import java.util.function.UnaryOperator;
+import java.util.regex.Pattern;
+
+public class Main {
+  private final Pattern pattern = Pattern.compile("[a-z]");
+
+  public <T extends CharSequence> void test() {
+    Object str = "def";
+    String xyz = Optional.of("xyz").map(x -> x).filter(Predicate.isEqual(str))
+      .filter(str -> pattern.matcher(str).find()).orElse("");
+    UnaryOperator<T> op = x -> x;
+  }
+}