cli: repeatable tags option (#940)

resolves #939
cucumber · Oct 4, 2017 · fb9e8fc · fb9e8fc
1 parent 81aeaed
commit fb9e8fc
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diff --git a/docs/cli.md b/docs/cli.md
@@ -97,7 +97,7 @@ In order to store and reuse commonly used CLI options, you can add a `cucumber.j
 
 ## Tags
 
-Use `--tags <EXPRESSION>` to run specific features or scenarios.
+Use `--tags <EXPRESSION>` to run specific features or scenarios. This option is repeatable and the expressions will be merged with `and` operator.
 `<EXPRESSION>` is a [cucumber tag expression](https://docs.cucumber.io/tag-expressions/).
 
 ## Transpilers

diff --git a/features/target_specific_scenarios_by_tag.feature b/features/target_specific_scenarios_by_tag.feature
@@ -45,6 +45,13 @@ Feature: Target specific scenarios
     Then it fails
     And it runs the scenario "first scenario"
 
+  Scenario: merge multiple tag expressions
+    When I run cucumber.js with `--tags @b --tags "not @c"`
+    Then it fails
+    And it runs the scenarios:
+      | NAME |
+      | second scenario - Z |
+
   Scenario: run a single scenario outline
     When I run cucumber.js with `--tags @b`
     Then it fails

diff --git a/src/cli/argv_parser.js b/src/cli/argv_parser.js
@@ -27,6 +27,10 @@ export default class ArgvParser {
     }
   }
 
+  static mergeTags(val, memo) {
+    return memo === '' ? `(${val})` : `${memo} and (${val})`
+  }
+
   static validateLanguage(val) {
     if (!_.includes(_.keys(Gherkin.DIALECTS), val)) {
       throw new Error('Unsupported ISO 639-1: ' + val)
@@ -89,7 +93,8 @@ export default class ArgvParser {
       )
       .option(
         '-t, --tags <EXPRESSION>',
-        'only execute the features or scenarios with tags matching the expression',
+        'only execute the features or scenarios with tags matching the expression (repeatable)',
+        ArgvParser.mergeTags,
         ''
       )
       .option(