JS backend: support for Throwable.getMessage

js/js.translator/testData/expression/try/cases/tryCatchExpressionWithMessage.kt

@@ -0,0 +1,57 @@
+package foo
+
+fun box(): String {
+
+    var s: String = ""
+
+    try {
+        throw Exception("Exception")
+    } catch (e: Throwable) {
+        s = "Throwable:" + e.getMessage()!!
+    }
+    assertEquals("Throwable:Exception", s)
+
+    s = ""
+    try {
+        throw Exception("Exception")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:Exception", s)
+
+    s = ""
+    try {
+        throw RuntimeException("RuntimeException")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:RuntimeException", s)
+
+    s = ""
+    try {
+        throw NullPointerException("NullPointerException")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:NullPointerException", s)
+
+    s = ""
+    try {
+        throw IndexOutOfBoundsException("IndexOutOfBoundsException")
+    } catch (e: NullPointerException) {
+        s = "NullPointerException:" + e.getMessage()!!
+    } catch (e: RuntimeException) {
+        s = "RuntimeException:" + e.getMessage()!!
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("RuntimeException:IndexOutOfBoundsException", s)
+
+    try {
+        throw RuntimeException()
+    } catch (e: Exception) {
+        assertEquals(null, e.getMessage())
+    }
+
+   return "OK"
+}