fix(runner): Do not persist grep option across runs

lib/helper.js

@@ -169,3 +169,15 @@ exports.defer = () => {
     promise: promise
   }
 }
+
+exports.saveOriginalArgs = (config) => {
+  if (config && config.client && config.client.args) {
+    config.client.originalArgs = _.cloneDeep(config.client.args)
+  }
+}
+
+exports.restoreOriginalArgs = (config) => {
+  if (config && config.client && config.client.originalArgs) {
+    config.client.args = _.cloneDeep(config.client.originalArgs)
+  }
+}

lib/middleware/runner.js

@@ -15,6 +15,7 @@ var json = require('body-parser').json()
 function createRunnerMiddleware (emitter, fileList, capturedBrowsers, reporter, executor,
   /* config.protocol */ protocol, /* config.hostname */ hostname, /* config.port */
   port, /* config.urlRoot */ urlRoot, config) {
+  helper.saveOriginalArgs(config)
   return function (request, response, next) {
     if (request.url !== '/__run__' && request.url !== urlRoot + 'run') {
       return next()
@@ -48,6 +49,7 @@ function createRunnerMiddleware (emitter, fileList, capturedBrowsers, reporter,
         })
       })
 
+      helper.restoreOriginalArgs(config)
       if (_.isEmpty(data.args)) {
         log.debug('Ignoring empty client.args from run command')
       } else if ((_.isArray(data.args) && _.isArray(config.client.args)) ||

test/unit/helper.spec.js

@@ -309,4 +309,32 @@ describe('helper', () => {
       helper.mmPatternWeight('{**,*}').should.be.deep.equal([2, 1, 0, 0, 0, 0])
     })
   })
+
+  describe('saveOriginalArgs', () => {
+    it('should clone config.client.args', () => {
+      var config = {
+        client: {
+          args: ['--somearg']
+        }
+      }
+      expect(config.client.originalArgs).to.not.exist
+      helper.saveOriginalArgs(config)
+      config.client.args.should.be.deep.equal(['--somearg'])
+      config.client.originalArgs.should.be.deep.equal(['--somearg'])
+    })
+  })
+
+  describe('restoreOriginalArgs', () => {
+    it('should restore config.client.originalArgs', () => {
+      var config = {
+        client: {
+          args: ['--somearg'],
+          originalArgs: []
+        }
+      }
+      helper.restoreOriginalArgs(config)
+      config.client.args.should.be.deep.equal([])
+      config.client.originalArgs.should.be.deep.equal([])
+    })
+  })
 })