Do not allow to call Raven.config() more than once

Author: TvoroG

src/raven.js

@@ -52,6 +52,10 @@ var Raven = {
      * @return {Raven}
      */
     config: function(dsn, options) {
+        if (globalServer) {
+            logDebug('error', 'Error: Raven has already been configured');
+            return Raven;
+        }
         if (!dsn) return Raven;
 
         var uri = parseDSN(dsn),

test/raven.test.js

@@ -1169,6 +1169,15 @@ describe('Raven (public API)', function() {
             assert.equal(Raven.config(''), Raven);
         });
 
+        it('should not set global options more than once', function() {
+            this.sinon.spy(window, 'parseDSN');
+            this.sinon.stub(window, 'logDebug');
+            setupRaven();
+            setupRaven();
+            assert.isTrue(parseDSN.calledOnce);
+            assert.isTrue(logDebug.called);
+        });
+
         describe('whitelistUrls', function() {
             it('should be false if none are passed', function() {
                 Raven.config('//abc@example.com/2');