Add compatibility check for ember-cli-qunit@4

index.js

@@ -6,6 +6,9 @@ module.exports = {
   name: 'ember-exam',
 
   includedCommands: function() {
+    var emberCliQunitCompatCheck = require('./lib/utils/ember-cli-qunit-compat-check');
+    emberCliQunitCompatCheck(this);
+
     return require('./lib/commands');
   },
 

lib/utils/ember-cli-qunit-compat-check.js

@@ -0,0 +1,12 @@
+'use strict';
+
+var VersionChecker = require('ember-cli-version-checker');
+
+module.exports = function emberCliQunitCompatCheck(addon) {
+  var checker = new VersionChecker(addon);
+  var dep = checker.for('ember-cli-qunit', 'npm');
+
+  if (dep.isAbove('4.0.0')) {
+    console.error('\x1b[31m', '\nERROR: [email protected] is not compatible with ember-cli-qunit versions >= 4.0.0. Please upgrade to [email protected] or higher. See http://bit.ly/2yqVGDC for more info.\n', '\x1b[0m');
+  }
+};

package.json

@@ -58,6 +58,7 @@
     "cli-table2": "^0.2.0",
     "debug": "^2.2.0",
     "ember-cli-babel": "^5.1.6",
+    "ember-cli-version-checker": "^1.3.1",
     "fs-extra": "^0.30.0",
     "rimraf": "^2.5.4"
   },