fix(testrunner): better capture Location for hooks (#1680)

Author: dgozman

utils/testrunner/Location.js

@@ -49,9 +49,7 @@ class Location {
     return this._fileName + ':' + this._lineNumber + ':' + this._columnNumber;
   }
 
-  // TODO: static getCallerLocationIn(glob) vs getCallerLocationIgnoring(glob).
-
-  static getCallerLocation(filename) {
+  static getCallerLocation(ignorePrefix = __dirname) {
     const error = new Error();
     const stackFrames = error.stack.split('\n').slice(1);
     const location = new Location();
@@ -71,7 +69,7 @@ class Location {
       if (!match)
         return null;
       const filePath = match[1];
-      if (filePath === __filename || filePath === filename)
+      if (filePath === __filename || filePath.startsWith(ignorePrefix))
         continue;
 
       location._filePath = filePath;

utils/testrunner/Matchers.js

@@ -40,7 +40,7 @@ class MatchError extends Error {
     super(message);
     this.name = this.constructor.name;
     this.formatter = formatter;
-    this.location = Location.getCallerLocation(__filename);
+    this.location = Location.getCallerLocation();
     Error.captureStackTrace(this, this.constructor);
   }
 }

utils/testrunner/Test.js

@@ -23,7 +23,7 @@ const TestExpectation = {
 };
 
 function createHook(callback, name) {
-  const location = Location.getCallerLocation(__filename);
+  const location = Location.getCallerLocation();
   return { name, body: callback, location };
 }
 

utils/testrunner/TestCollector.js

@@ -136,7 +136,7 @@ class TestCollector {
     this._currentSuite = new Suite(null, '', new Location());
 
     this._api.describe = specBuilder(this._suiteModifiers, this._suiteAttributes, (specs, name, suiteCallback, ...suiteArgs) => {
-      const location = Location.getCallerLocation(__filename);
+      const location = Location.getCallerLocation();
       const suite = new Suite(this._currentSuite, name, location);
       for (const { callback, args } of specs)
         callback(suite, ...args);
@@ -146,7 +146,7 @@ class TestCollector {
       this._currentSuite = suite.parentSuite();
     });
     this._api.it = specBuilder(this._testModifiers, this._testAttributes, (specs, name, testCallback) => {
-      const location = Location.getCallerLocation(__filename);
+      const location = Location.getCallerLocation();
       const test = new Test(this._currentSuite, name, testCallback, location);
       test.setTimeout(timeout);
       for (const { callback, args } of specs)