added test cases to try reproduce yesterdays JS bug with missing "this.drop(1)" in List.tail property, found another JS compile issue...

js/js.tests/test/org/jetbrains/k2js/test/semantics/ExtensionFunctionTest.java

@@ -66,4 +66,12 @@ public final class ExtensionFunctionTest extends SingleFileTranslationTest {
     public void testExtensionFunctionCalledFromExtensionFunction() throws Exception {
         fooBoxTest();
     }
+
+    public void testExtensionOnClassWithExplicitAndImplicitReceiver() throws Exception {
+        fooBoxTest();
+    }
+
+    public void TODO_FIXME_testExtensionPropertyOnClassWithExplicitAndImplicitReceiver() throws Exception {
+        fooBoxTest();
+    }
 }

js/js.translator/testFiles/extensionFunction/cases/extensionOnClassWithExplicitAndImplicitReceiver.kt

@@ -0,0 +1,24 @@
+package foo
+
+class Foo {
+
+  fun blah(): Int {
+    return 5
+  }
+
+}
+
+public inline fun Foo.fooImp() : String {
+  return "impl" + blah()
+}
+
+public inline fun Foo.fooExp() : String {
+  return "expl" + this.blah()
+}
+
+fun box() : Boolean {
+    var a = Foo()
+    if (a.fooImp() != "impl5") return false
+    if (a.fooExp() != "expl5") return false
+    return true;
+}

js/js.translator/testFiles/extensionFunction/cases/extensionPropertyOnClassWithExplicitAndImplicitReceiver.kt

@@ -0,0 +1,26 @@
+package foo
+
+class Foo {
+
+  fun blah(): Int {
+    return 6
+  }
+
+}
+
+val Foo.fooImp : String
+  get() {
+    return "implProp" + blah()
+  }
+
+val Foo.fooExp() : String
+  get() {
+    return "explProp" + this.blah()
+  }
+
+fun box() : Boolean {
+    var a = Foo()
+    if (a.fooImp != "implProp6") return false
+    if (a.fooExp != "explProp6") return false
+    return true;
+}