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gaia/tests/jsmarionette/mocha/mocha-json-proxy/test/helper.js

@@ -0,0 +1,63 @@
+'use strict';
+var exec = require('child_process').exec,
+    fork = require('child_process').fork,
+    EE = require('events').EventEmitter,
+    debug = require('debug')('mocha-json-proxy:test');
+
+
+function forkFixture(test) {
+  var reporterPath = __dirname + '/../reporter.js';
+  var exec = __dirname + '/../../../../.bin/_mocha';
+  var cmd = [
+    '--reporter', reporterPath,
+    '--ui', 'tdd',
+    __dirname + '/fixtures/' + test
+  ];
+
+  var env = {};
+  for (var key in process.env) {
+    env[key] = process.env[key];
+  }
+
+  var runnerOpts = {
+    env: env
+  };
+
+  // turn on the option to send messages directly between processes.
+  runnerOpts.env[require(reporterPath).FORK_ENV] = true;
+
+  return fork(exec, cmd, runnerOpts);
+}
+
+function runFixture(test, callback) {
+  var cmd =
+    __dirname + '/../../../../.bin/mocha' +
+    ' --ui tdd --reporter ' + __dirname + '/../reporter ' +
+    __dirname + '/fixtures/' + test;
+
+  var emitter = new EE();
+  exec(cmd, function(err, stdout, stderr) {
+    debug('stdout', stdout);
+    if (stderr) {
+      console.error('ERR>>', stderr);
+    }
+
+    callback(null, emitter);
+
+    var out = stdout.trim().split('\n');
+    out.forEach(function(line) {
+      var json;
+      try {
+        json = JSON.parse(line);
+      } catch (e) {
+        console.error(e);
+      }
+      emitter.emit.apply(emitter, json);
+    });
+    emitter.emit('helper end');
+  });
+}
+
+global.assert = require('chai').assert;
+global.runFixture = runFixture;
+global.forkFixture = forkFixture;