[JS TESTS] Don't run ES6 test on win & mac till j2v8 issue is fixed.

Author: romanart

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt

@@ -56,6 +56,8 @@ abstract class BasicIrBoxTest(
 
     val runEs6Mode: Boolean = getBoolean("kotlin.js.ir.es6", false)
 
+    private val osName: String = System.getProperty("os.name").toLowerCase()
+
     // TODO Design incremental compilation for IR and add test support
     override val incrementalCompilationChecksEnabled = false
 
@@ -190,6 +192,17 @@ abstract class BasicIrBoxTest(
         }
     }
 
+    override fun dontRunOnSpecificPlatform(targetBackend: TargetBackend): Boolean {
+        if (targetBackend != TargetBackend.JS_IR_ES6) return false
+        if (!runEs6Mode) return false
+
+        // TODO: Since j2v8 does not support ES6 on mac and windows, temporary don't run such test on those platforms.
+        if (osName.indexOf("win") >= 0) return true
+        if (osName.indexOf("mac") >= 0 || osName.indexOf("darwin") >= 0) return true
+
+        return false
+    }
+
     override fun runGeneratedCode(
         jsFiles: List<String>,
         testModuleName: String?,