[JS IR] Add tests for KT-41964 and KT-44981

js/js.translator/testData/box/jsCode/kt41964.kt

@@ -0,0 +1,41 @@
+// EXPECTED_REACHABLE_NODES: 1280
+
+// MODULE: lib
+// FILE: aaa.kt
+package bar
+
+fun aaa() {}
+
+fun test1(aaa: String): String? {
+    return js("aaa")
+}
+
+// MODULE: main(lib)
+// FILE: bbb.kt
+package foo
+
+import bar.aaa
+import bar.test1
+
+fun bbb() {}
+
+fun test2(aaa: String, bbb: Int): String {
+    return "" + js("aaa") + js("bbb")
+}
+
+fun keep() {
+    aaa()
+    bbb()
+}
+
+fun box(): String {
+    val a = test1("first")
+    if (a != "first") return "fail1: $a"
+
+    val b = test2("second", 31)
+    if (b != "second31") return "fail2: $b"
+
+    keep()
+
+    return "OK"
+}

js/js.translator/testData/box/jsCode/kt44981.kt

@@ -0,0 +1,12 @@
+// EXPECTED_REACHABLE_NODES: 1267
+
+const val x = '2'
+const val y = '+'
+const val z = '3'
+
+fun box(): String {
+    if (js(x.toString() + z) !== 23) return "Fail 1"
+    if (js(x.toString() + y + z) !== 5) return "Fail 2"
+
+    return "OK"
+}