[KT-7683] Implement translation of 'when .. in' clause to JS

js/js.translator/testData/expression/when/cases/whenWithRangeClause.kt

@@ -0,0 +1,23 @@
+// see KT-7683
+// WhenTranslator must recognize KtWhenConditionInRange and produce faster code when matched expression is Int
+package foo
+
+fun box(): String {
+    var result = testFun(-1) + testFun(0) + testFun(5) + testFun(9) + testFun(10) + testFun(150) + testFun(800)
+    return if (result == "misshithithitmisshit!@@@" && invocationCount == 7) "OK" else "fail"
+}
+fun testFun(index: Int): String {
+    val thirdRange = 500..1000
+    return when (get(index)) {
+        in 0..9 -> "hit"
+        in 100.rangeTo(200) -> "hit!"
+        in thirdRange -> "@@@"
+        else -> "miss"
+    }
+}
+
+fun get(value: Int): Int {
+    invocationCount++
+    return value
+}
+var invocationCount = 0