feat: Allow array for skip tag

lib/runner.js

@@ -27,20 +27,18 @@ module.exports = class Runner {
     })
   }
 
-  getTags (nightwatchArgv) {
-    let result = nightwatchArgv.tag || []
+  getTags (tags) {
+    tags = tags || []
 
-    if (typeof result === 'string') {
-      result = [result]
+    if (typeof tags === 'string') {
+      tags = tags.split(',')
     }
 
-    return result.map((tag) => `@${tag}`)
-  }
-
-  getSkipTags (nightwatchArgv) {
-    if (!nightwatchArgv.skiptags) return []
-
-    return nightwatchArgv.skiptags.split(',').map((tag) => `@${tag}`)
+    if (Array.isArray(tags)) {
+      return tags.map((tag) => `@${tag}`)
+    } else {
+      throw new Error(`Expected tags to be Array or String.`)
+    }
   }
 
   featurePathToDummyPath (featureFile) {
@@ -81,8 +79,8 @@ module.exports = class Runner {
       args: this.options.cucumberArgs,
       featureFiles,
       jsonReport: this.jsonReport,
-      tags: this.getTags(this.nightwatchApi.nightwatchArgv),
-      skipTags: this.getSkipTags(this.nightwatchApi.nightwatchArgv)
+      tags: this.getTags(this.nightwatchApi.nightwatchArgv.tag),
+      skipTags: this.getTags(this.nightwatchApi.nightwatchArgv.skiptags)
     })
     return yield * this.cucumberApi.run(cucumberArgs)
   }