Ensure getclass is called to throw TypeError.

JsCompiler doesn't assume toString call may result in exceptions
and consider them side effect free. This makes the test less
fragile.

PiperOrigin-RevId: 332939058
Change-Id: I34c6fed201b3d03820e7618b9e8bf79b63aae92a

user/test/com/google/gwt/emultest/java/lang/JsExceptionTest.java

diff --git a/user/test/com/google/gwt/emultest/java/lang/JsExceptionTest.java b/user/test/com/google/gwt/emultest/java/lang/JsExceptionTest.java
index 511520d..0daaac2 100644
--- a/user/test/com/google/gwt/emultest/java/lang/JsExceptionTest.java
+++ b/user/test/com/google/gwt/emultest/java/lang/JsExceptionTest.java
@@ -14,7 +14,6 @@
 package com.google.gwt.emultest.java.lang;
 
 import com.google.gwt.testing.TestUtils;
-
 import jsinterop.annotations.JsMethod;
 import jsinterop.annotations.JsPackage;
 import jsinterop.annotations.JsType;
@@ -123,7 +122,7 @@
 
   private static void throwTypeError() {
     Object nullObject = null;
-    nullObject.toString();
+    nullObject.getClass();
   }
 
   @JsType(isNative = true, namespace = "<window>")