fix #3473: browser not defined issue

lib/runner/matchers/tags.js

@@ -44,6 +44,15 @@ class TagsMatcher {
 
     const context = new Context({modulePath, settings});
     context.setReloadModuleCache();
+
+    // Defining global browser object to make it available before nightwatch client created.
+    // To avoid errors like browser is not defined if testsuits has tags
+    Object.defineProperty(global, 'browser', {
+      configurable: true,
+      get: function() {
+        return {};
+      }
+    });
 
     try {
       if (this.usingMocha) {

test/sampletests/tagswithbrowserobject/sample.js

@@ -0,0 +1,10 @@
+describe('Sample test with tags and global browser object', function() {
+  const globals = browser.globals;
+  this.tags = ['browser'];
+  it('demoTagTest', function(browser) {
+    browser
+      .url('http://localhost')
+      .assert.elementPresent('#weblogin')
+      .end();
+  });
+});

test/src/runner/testRunWithTags.js

@@ -31,6 +31,24 @@ describe('testRunWithTags', function() {
     });
   });
 
+  it('testRunner with tags', function() {
+    const testsPath = path.join(__dirname, '../../sampletests');
+
+    return runTests({
+      _source: [testsPath],
+      tag: ['browser']
+    }, settings({
+      output: false,
+      disable_typescript: true,
+      globals: {
+        reporter(results) {
+          assert.strictEqual(Object.keys(results.modules).length, 1);
+          assert.ok('demoTagTest' in results.modules[`tagswithbrowserobject${path.sep}sample`].completed);
+        }
+      }
+    }));
+  });
+
   it('testRunWithTags', function() {
     let testsPath = path.join(__dirname, '../../sampletests');