Added some new test for java8

compiler/testData/codegen/java8/boxWithJava/defaultMethodCallFromTrait/defaultCall.kt

@@ -0,0 +1,14 @@
+trait KTrait : Simple {
+    fun bar(): String {
+        return test("O") + Simple.testStatic("O")
+    }
+}
+
+class Test : KTrait {}
+
+fun box(): String {
+    val test = Test().bar()
+    if (test != "OKOK") return "fail $test"
+
+    return "OK"
+}

compiler/testData/codegen/java8/boxWithJava/defaultMethodCallViaClass/Simple.java

@@ -0,0 +1,9 @@
+interface Simple {
+    default String test(String s) {
+        return s + "K";
+    }
+
+    static String testStatic(String s) {
+        return s + "K";
+    }
+}

compiler/testData/codegen/java8/boxWithJava/defaultMethodOverride/Simple.java

@@ -0,0 +1,5 @@
+interface Simple {
+    default String test(String s) {
+        return s + "Fail";
+    }
+}

compiler/testData/codegen/java8/boxWithJava/defaultMethodOverride/override.kt

@@ -0,0 +1,13 @@
+trait KTrait: Simple {
+    override fun test(s: String): String {
+        return s + "K"
+    }
+}
+
+class Test : KTrait {
+
+}
+
+fun box(): String {
+    return Test().test("O")
+}

compiler/testData/codegen/java8/boxWithJava/inheritKotlin/Simple.java

@@ -0,0 +1,5 @@
+interface Simple extends KTrait {
+    default String test() {
+        return "simple";
+    }
+}

compiler/testData/codegen/java8/boxWithJava/inheritKotlin/defaultCall.kt

@@ -0,0 +1,23 @@
+trait KTrait {
+    fun test(): String {
+        return "base";
+    }
+}
+
+class Test : Simple {
+
+    fun bar(): String {
+        return super.test()
+    }
+
+}
+
+fun box(): String {
+    val test = Test().test()
+    if (test != "simple") return "fail $test"
+
+    val bar = Test().bar()
+    if (bar != "simple") return "fail 2 $bar"
+
+    return "OK"
+}