JS: move expressions test to box tests

js/js.translator/testData/box/expression/compareTo/customCompareToMethod.kt

@@ -0,0 +1,39 @@
+package foo
+
+class A(val value: Int) : Comparable<A> {
+    override public fun compareTo(other: A): Int = other.value.compareTo(value)
+}
+
+class B(val value: Int)
+
+fun testExtensionFunctionAsCompareTo() {
+    val compareTo: B.( B ) -> Int = { other -> other.value.compareTo(this.value) }
+
+    val x: B = B(100)
+    val y: B = B(200)
+
+    assertEquals(1, x.compareTo(y), "ext fun: x compareTo y")
+}
+
+fun testMethodAsCompareTo() {
+    val x: A = A(100)
+    val y: A = A(200)
+
+    assertEquals(false, x < y, "meth: x < y")
+    assertEquals(true, x > y, "meth: x > y")
+    assertEquals(1, x.compareTo(y), "meth: x compareTo y")
+
+    val comparable: Comparable<A> = x
+    assertEquals(false, comparable < y, "meth: (x: Comparable<A>) < y")
+    assertEquals(true, comparable > y, "meth: (x: Comparable<A>) > y")
+    assertEquals(1, comparable.compareTo(y), "meth: (x: Comparable<A>) compareTo y")
+}
+
+fun box(): String {
+
+    testExtensionFunctionAsCompareTo()
+
+    testMethodAsCompareTo()
+
+    return "OK"
+}