added test case for KT-2354

js/js.translator/testFiles/expression/equals/cases/customEqualsMethod.kt

@@ -0,0 +1,18 @@
+package foo
+
+class Foo(val name: String) {
+  public fun equals(that: Foo): Boolean {
+    return this.name == that.name
+  }
+}
+
+fun box() : Boolean {
+    val a = Foo("abc")
+    val b = Foo("abc")
+    val c = Foo("def")
+
+    if (a != b) return false
+    if (a == c) return false
+
+    return true
+}

js/js.translator/testFiles/expression/equals/cases/stringsEqual.kt

@@ -0,0 +1,12 @@
+package foo
+
+fun box() : Boolean {
+    val a = "abc"
+    val b = "abc"
+    val c = "def"
+
+    if (a != b) return false
+    if (a == c) return false
+
+    return true
+}