[JS BE] Merge Legacy and IR BE exceptions-related test data

- regenerate tests
 - add consistency test

js/js.translator/testData/box/standardClasses/throwableConsistancy.kt

@@ -0,0 +1,55 @@
+// IGNORE_BACKEND: JS
+
+
+
+fun test(case: String, expctedMessage: String?, expectedCause: Throwable?, expectedToString: String, t: Throwable): String {
+    val actualMessage = t.message
+    if (actualMessage != expctedMessage) return "$case FAIL message: $actualMessage, expcted: $expctedMessage"
+
+    val actualCause = t.cause
+    if (actualCause != expectedCause) return "$case FAIL cause: $actualCause, expcted: $expectedCause"
+
+    val actualToString = t.toString()
+    if (actualToString != expectedToString) return "$case FAIL toString: $actualToString, expcted: $expectedToString"
+
+    return "OK"
+}
+
+
+fun box(): String {
+
+
+    var result: String = "FAIL"
+
+    result = test("Throwable()", null, null, "Throwable", Throwable())
+    if (result != "OK") return result
+
+    result = test("Throwable(\"aaaa\")", "aaaa", null, "Throwable: aaaa", Throwable("aaaa"))
+    if (result != "OK") return result
+
+    var cause = Throwable()
+    result = test("Throwable(Throwable())", "Throwable", cause, "Throwable: Throwable", Throwable(cause))
+    if (result != "OK") return result
+
+    cause = Throwable("ccc")
+    result = test("Throwable(\"bbbb\", Throwable(\"ccc\"))", "bbbb", cause, "Throwable: bbbb", Throwable("bbbb", cause))
+    if (result != "OK") return result
+
+    result = test("Throwable(message = null)", null, null, "Throwable", Throwable(message = null))
+    if (result != "OK") return result
+
+    result = test("Throwable(cause = null)", null, null, "Throwable", Throwable(cause = null))
+    if (result != "OK") return result
+
+    result = test("Throwable(null, null)", null, null, "Throwable", Throwable(null, null))
+    if (result != "OK") return result
+
+    result = test("Throwable(\"eee\", null)", "eee", null, "Throwable: eee", Throwable("eee", null))
+    if (result != "OK") return result
+
+    cause = Throwable("ddd")
+    result = test("Throwable(null, Throwable(\"ddd\"))", null, cause, "Throwable", Throwable(null, cause))
+    if (result != "OK") return result
+
+    return "OK"
+}