Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/jvm8DefaultInterfaceMethods/javaDefaultMethodGeneric.kt

@@ -0,0 +1,41 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+// FILE: javaDefaultMethod.kt
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class K<T: String>(val k: T) : J {
+    override fun get2() = k
+}
+
+fun box(): String {
+    val k = K("K")
+
+    val test1 = k.get1() + k.get2()
+    if (test1 != "OK") throw AssertionError("test1: $test1")
+
+    val j: J = k
+    val test2 = j.get1() + j.get2()
+    if (test2 != "OK") throw AssertionError("test2: $test2")
+
+    val test3 = JT.test(k)
+    if (test3 != "OK") throw AssertionError("test3: $test3")
+
+    return "OK"
+}
+
+// FILE: J.java
+public interface J {
+    default String get1() { return "O"; }
+    default String get2() { return "Failed"; }
+}
+
+// FILE: JT.java
+public class JT {
+    public static String test(J j) {
+        return j.get1() + j.get2();
+    }
+}