1 files changed, 69 insertions, 0 deletions
diff --git a/remote/test/puppeteer/json-mocha-reporter.js b/remote/test/puppeteer/json-mocha-reporter.js
new file mode 100644
index 0000000000..ffe1d60675
--- /dev/null
+++ b/remote/test/puppeteer/json-mocha-reporter.js
@@ -0,0 +1,69 @@
+const mocha = require('mocha');
+module.exports = JSONExtra;
+
+const constants = mocha.Runner.constants;
+
+/*
+
+This is a copy of
+https://github.com/mochajs/mocha/blob/master/lib/reporters/json-stream.js
+with more event hooks. mocha does not support extending reporters or using
+multiple reporters so a custom reporter is needed and it must be local
+to the project.
+
+*/
+
+function JSONExtra(runner, options) {
+  mocha.reporters.Base.call(this, runner, options);
+  mocha.reporters.JSON.call(this, runner, options);
+  const self = this;
+
+  runner.once(constants.EVENT_RUN_BEGIN, function () {
+    writeEvent(['start', {total: runner.total}]);
+  });
+
+  runner.on(constants.EVENT_TEST_PASS, function (test) {
+    writeEvent(['pass', clean(test)]);
+  });
+
+  runner.on(constants.EVENT_TEST_FAIL, function (test, err) {
+    test = clean(test);
+    test.err = err.message;
+    test.stack = err.stack || null;
+    writeEvent(['fail', test]);
+  });
+
+  runner.once(constants.EVENT_RUN_END, function () {
+    writeEvent(['end', self.stats]);
+  });
+
+  runner.on(constants.EVENT_TEST_BEGIN, function (test) {
+    writeEvent(['test-start', clean(test)]);
+  });
+
+  runner.on(constants.EVENT_TEST_PENDING, function (test) {
+    writeEvent(['pending', clean(test)]);
+  });
+}
+
+function writeEvent(event) {
+  process.stdout.write(JSON.stringify(event) + '\n');
+}
+
+/**
+ * Returns an object literal representation of `test`
+ * free of cyclic properties, etc.
+ *
+ * @private
+ * @param {Object} test - Instance used as data source.
+ * @return {Object} object containing pared-down test instance data
+ */
+function clean(test) {
+  return {
+    title: test.title,
+    fullTitle: test.fullTitle(),
+    file: test.file,
+    duration: test.duration,
+    currentRetry: test.currentRetry(),
+  };
+}