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diff --git a/node_modules/hooker/child.js b/node_modules/hooker/child.js
new file mode 100644
index 000000000..ae7dcf2fa
--- /dev/null
+++ b/node_modules/hooker/child.js
@@ -0,0 +1,101 @@
+var path = require('path');
+var fs = require('fs');
+var nodeunit = require('nodeunit');
+
+var filepaths = fs.readdirSync('test').map(function(filename) {
+  return path.join('test', filename);
+});
+
+var unfinished = {};
+var currentModule;
+function sendMessage(message) {
+  process.stdout.write(JSON.stringify(message) + '\n');
+}
+
+// If an exception is thrown, let the parent process know and exit.
+process.on('uncaughtException', function (e) {
+  sendMessage({error: [e.name, e.message, e.stack]});
+  process.exit();
+});
+
+// If Nodeunit explodes because a test was missing test.done(), handle it.
+var unfinished = {};
+process.on('exit', function (e) {
+  var len = Object.keys(unfinished).length
+  if (len > 0) {
+    sendMessage({exit: ['UNFINISHED']});
+    // process.reallyExit(len);
+  } else {
+    sendMessage({exit: ['finished']});
+  }
+  // process.exit();
+});
+
+nodeunit.reporters.test = {
+  run: function(files, options, callback) {
+    // Nodeunit needs absolute paths.
+    var paths = files.map(function (filepath) {
+      return path.resolve(filepath);
+    });
+    nodeunit.runFiles(paths, {
+      // No idea.
+      testspec: undefined,
+      // Executed when the first test in a file is run. If no tests exist in
+      // the file, this doesn't execute.
+      moduleStart: function(name) {
+        // Keep track of this so that moduleDone output can be suppressed in
+        // cases where a test file contains no tests.
+        currentModule = name;
+        // Send back to the parent process.
+        sendMessage({moduleStart: [name.toString()]});
+      },
+      // Executed after a file is done being processed. This executes whether
+      // tests exist in the file or not.
+      moduleDone: function(name) {
+        // Abort if no tests actually ran.
+        if (name !== currentModule) { return; }
+        // Send back to the parent process.
+        sendMessage({moduleDone: [name.toString()]});
+      },
+      // Executed before each test is run.
+      testStart: function(name) {
+        // Keep track of the current test, in case test.done() was omitted
+        // and Nodeunit explodes.
+        unfinished[name] = name;
+        // Send back to the parent process.
+        sendMessage({testStart: [name.toString()]});
+      },
+      // Executed after each test and all its assertions are run.
+      testDone: function(name, assertions) {
+        delete unfinished[name];
+        // Send back to the parent process.
+        sendMessage({testDone: [
+          name.toString(),
+          assertions.failures(),
+          assertions.map(function(assertion) {
+            var e = assertion.error;
+            if (e) {
+              assertion.error = {
+                name: e.name,
+                message: e.message,
+                stack: e.stack
+              };
+            }
+            return assertion;
+          })
+        ]});
+      },
+      // Executed when everything is all done.
+      done: function (assertions) {
+        // Send back to the parent process.
+        sendMessage({done: [
+          assertions.failures(),
+          assertions.duration,
+          assertions
+        ]});
+      }
+    });
+  }
+}
+
+nodeunit.reporters.test.run(filepaths, {});