fix: Use correct frame for inboundFilter methods (#1893)

Author: kamilogorek

packages/core/src/integrations/inboundfilters.ts

@@ -178,10 +178,12 @@ export class InboundFilters implements Integration {
     try {
       if (event.stacktrace) {
         // tslint:disable-next-line:no-unsafe-any
-        return (event as any).stacktrace.frames[0].filename;
+        const frames = (event as any).stacktrace.frames;
+        return frames[frames.length - 1].filename;
       } else if (event.exception) {
         // tslint:disable-next-line:no-unsafe-any
-        return (event as any).exception.values[0].stacktrace.frames[0].filename;
+        const frames = (event as any).exception.values[0].stacktrace.frames;
+        return frames[frames.length - 1].filename;
       } else {
         return null;
       }

packages/core/test/lib/integrations/inboundfilters.test.ts

@@ -255,18 +255,28 @@ describe('InboundFilters', () => {
     const messageEvent = {
       message: 'wat',
       stacktrace: {
+        // Frames are always in the reverse order, as this is how Sentry expect them to come.
+        // Frame that crashed is the last one, the one from awesome-analytics
         frames: [
-          {
-            filename: 'https://awesome-analytics.io/some/file.js',
-          },
+          { filename: 'https://our-side.com/js/bundle.js' },
+          { filename: 'https://our-side.com/js/bundle.js' },
+          { filename: 'https://awesome-analytics.io/some/file.js' },
         ],
       },
     };
     const exceptionEvent = {
       exception: {
         values: [
           {
-            stacktrace: { frames: [{ filename: 'https://awesome-analytics.io/some/file.js' }] },
+            stacktrace: {
+              // Frames are always in the reverse order, as this is how Sentry expect them to come.
+              // Frame that crashed is the last one, the one from awesome-analytics
+              frames: [
+                { filename: 'https://our-side.com/js/bundle.js' },
+                { filename: 'https://our-side.com/js/bundle.js' },
+                { filename: 'https://awesome-analytics.io/some/file.js' },
+              ],
+            },
           },
         ],
       },