8270184: [TESTBUG] Add coverage for jvmci ResolvedJavaType.toJavaName…

…() for lambdas

Backport-of: 6a9bc10

test/hotspot/jtreg/compiler/jvmci/jdk.vm.ci.runtime.test/src/jdk/vm/ci/runtime/test/TestResolvedJavaType.java

@@ -162,6 +162,19 @@ public void isArrayTest() {
         }
     }
 
+    @Test
+    public void internalNameTest() {
+        // Verify that the last slash in lambda types are not replaced with a '.' as they
+        // are part of the type name.
+        Supplier<Runnable> lambda = () -> () -> System.out.println("run");
+        ResolvedJavaType lambdaType = metaAccess.lookupJavaType(lambda.getClass());
+        String typeName = lambdaType.getName();
+        int typeNameLen = TestResolvedJavaType.class.getSimpleName().length();
+        int index = typeName.indexOf(TestResolvedJavaType.class.getSimpleName());
+        String suffix = typeName.substring(index + typeNameLen, typeName.length() - 1);
+        assertEquals(TestResolvedJavaType.class.getName() + suffix, lambdaType.toJavaName());
+    }
+
     @Test
     public void getModifiersTest() {
         for (Class<?> c : classes) {