testdata for IDEA-121999

(cherry picked from commit 85f88420716c2bb2e0a73d524a33656a5699cf9f)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/mostSpecific/IDEA121999.java

@@ -0,0 +1,21 @@
+import java.util.function.Supplier;
+
+class LambdaTest {
+
+  static {
+    int <warning descr="Variable 'i' is never used">i</warning> = doSync(() -> foo());
+    int <warning descr="Variable 'i1' is never used">i1</warning> = doSync(LambdaTest::foo);
+  }
+
+  public static <T> T doSync(Supplier<T> <warning descr="Parameter 'block' is never used">block</warning>) {
+    return null;
+  }
+
+  public static void doSync(Runnable <warning descr="Parameter 'block' is never used">block</warning>) {
+  }
+
+  public static int foo() {
+    return 0;
+  }
+
+}