JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/dataClass/equals.kt

@@ -0,0 +1,44 @@
+package foo
+
+data class Holder<T>(val v: T)
+
+data class Dat(val start: String, val end: String)
+
+data class Dat2(val start: String, val end: String)
+
+class Obj(val start: String, val end: String)
+
+fun box(): String {
+    val d1 = Dat("a", "b")
+    val d2 = Dat("a", "b")
+    val d3 = Dat("a", "c")
+
+    val otherD1 = Dat2("a", "b")
+
+    assertEquals(d1, d1)
+    assertEquals(d1, d2)
+    assertNotEquals(d1, d3)
+
+    assertNotEquals(d1, otherD1)
+
+    var hd1 = Holder(Dat("y", "n"))
+    var hd2 = Holder(Dat("y", "n"))
+    var hd3 = Holder(Dat("1", "2"))
+
+    assertEquals(hd1, hd1)
+    assertEquals(hd1, hd2)
+    assertNotEquals(hd1, hd3)
+
+    var ho1 = Holder(Obj("+", "-"))
+    var ho2 = Holder(Obj("+", "-"))
+    var ho3 = Holder(Obj("*", "*"))
+
+    assertEquals(ho1, ho1)
+    assertNotEquals(ho1, ho2)
+    assertNotEquals(ho1, ho3)
+
+    val d1any: Any = d1
+    assertTrue(d1any != "")
+
+    return "OK"
+}