JS: move expressions test to box tests

js/js.translator/testData/box/expression/stringClass/stringSplit.kt

@@ -0,0 +1,30 @@
+package foo
+
+fun box(): String {
+    val testInput = "test data\t1foo  2 bar"
+    val tests = arrayOf(
+            " "     to arrayOf("test", "data\t1foo", "", "2", "bar"),
+            "\\s+"  to arrayOf("test", "data", "1foo", "2", "bar"),
+            "[sd]"  to arrayOf("te", "t ", "ata\t1foo  2 bar"),
+            "[\\d]" to arrayOf("test data\t", "foo  ", " bar")
+    )
+
+    for (test in tests) {
+        val regexp = test.first
+        val expected = test.second
+        val result = testInput.splitWithRegex(regexp)
+
+        if (result.asList() != expected.asList()) return "Wrong result for '$regexp' -- Expected: $expected | Actual: $result"
+    }
+
+    for (test in tests) {
+        val regexp = test.first
+        val limit = 2
+        val expected = Array(limit) { test.second[it] }
+        val result = testInput.splitWithRegex(regexp, limit)
+
+        if (result.asList() != expected.asList()) return "Wrong result for '$regexp' -- Expected: $expected | Actual: $result"
+    }
+
+    return "OK"
+}