adds scenarios to test nested steps

features/lang.feature

@@ -8,7 +8,7 @@ Savybė: užkrauti savybes
   Scenarijus: savybių užkrovimas iš aplanko
     Duota savybių aplankas "features"
     Kai aš išskaitau savybes
-    Tada aš turėčiau turėti 9 savybių failus:
+    Tada aš turėčiau turėti 10 savybių failus:
       """
       features/background.feature
       features/events.feature
@@ -16,6 +16,7 @@ Savybė: užkrauti savybes
       features/formatter/events.feature
       features/lang.feature
       features/load.feature
+      features/multistep.feature
       features/outline.feature
       features/run.feature
       features/snippets.feature

features/load.feature

@@ -6,7 +6,7 @@ Feature: load features
   Scenario: load features within path
     Given a feature path "features"
     When I parse features
-    Then I should have 9 feature files:
+    Then I should have 10 feature files:
       """
       features/background.feature
       features/events.feature
@@ -14,6 +14,7 @@ Feature: load features
       features/formatter/events.feature
       features/lang.feature
       features/load.feature
+      features/multistep.feature
       features/outline.feature
       features/run.feature
       features/snippets.feature

features/multistep.feature

@@ -0,0 +1,140 @@
+Feature: run features with nested steps
+  In order to test multisteps
+  As a test suite
+  I need to be able to execute multisteps
+
+  Scenario: should run passing multistep successfully
+    Given a feature "normal.feature" file:
+      """
+      Feature: normal feature
+
+        Scenario: run passing multistep
+          Given passing step
+          Then passing multistep
+      """
+    When I run feature suite
+    Then the suite should have passed
+    And the following steps should be passed:
+      """
+      passing step
+      passing multistep
+      """
+
+  Scenario: should fail multistep
+    Given a feature "failed.feature" file:
+      """
+      Feature: failed feature
+
+        Scenario: run failing multistep
+          Given passing step
+          When failing multistep
+          Then I should have 1 scenario registered
+      """
+    When I run feature suite
+    Then the suite should have failed
+    And the following step should be failed:
+      """
+      failing multistep
+      """
+    And the following steps should be skipped:
+      """
+      I should have 1 scenario registered
+      """
+    And the following steps should be passed:
+      """
+      passing step
+      """
+
+  Scenario: should fail nested multistep
+    Given a feature "failed.feature" file:
+      """
+      Feature: failed feature
+
+        Scenario: run failing nested multistep
+          Given failing nested multistep
+          When passing step
+      """
+    When I run feature suite
+    Then the suite should have failed
+    And the following step should be failed:
+      """
+      failing nested multistep
+      """
+    And the following steps should be skipped:
+      """
+      passing step
+      """
+
+  Scenario: should skip steps after undefined multistep
+    Given a feature "undefined.feature" file:
+      """
+      Feature: run undefined multistep
+
+        Scenario: run undefined multistep
+          Given passing step
+          When undefined multistep
+          Then passing multistep
+      """
+    When I run feature suite
+    Then the suite should have passed
+    And the following step should be passed:
+      """
+      passing step
+      """
+    And the following step should be undefined:
+      """
+      undefined multistep
+      """
+    And the following step should be skipped:
+      """
+      passing multistep
+      """
+
+  Scenario: should match undefined steps in a row
+    Given a feature "undefined.feature" file:
+      """
+      Feature: undefined feature
+
+        Scenario: parse a scenario
+          Given undefined step
+          When undefined multistep
+          Then I should have 1 scenario registered
+      """
+    When I run feature suite
+    Then the suite should have passed
+    And the following steps should be undefined:
+      """
+      undefined step
+      undefined multistep
+      """
+    And the following step should be skipped:
+      """
+      I should have 1 scenario registered
+      """
+
+  Scenario: should mark undefined steps after pending
+    Given a feature "pending.feature" file:
+      """
+      Feature: pending feature
+
+        Scenario: parse a scenario
+          Given pending step
+          When undefined step
+          Then undefined multistep
+          And I should have 1 scenario registered
+      """
+    When I run feature suite
+    Then the suite should have passed
+    And the following steps should be undefined:
+      """
+      undefined step
+      undefined multistep
+      """
+    And the following step should be pending:
+      """
+      pending step
+      """
+    And the following step should be skipped:
+      """
+      I should have 1 scenario registered
+      """

run.go

@@ -160,13 +160,11 @@ func Run(suite string, contextInitializer func(suite *Suite)) int {
 func supportsConcurrency(format string) bool {
 	switch format {
 	case "events":
-		return false
 	case "junit":
-		return false
 	case "pretty":
-		return false
 	case "cucumber":
-		return false
+	default:
+		return true // supports concurrency
 	}
 
 	return true // all custom formatters are treated as supporting concurrency

stepdef.go

@@ -14,6 +14,22 @@ import (
 
 var matchFuncDefRef = regexp.MustCompile(`\(([^\)]+)\)`)
 
+// Steps allows to nest steps
+// instead of returning an error in step func
+// it is possible to return combined steps:
+//
+//   func multistep(name string) godog.Steps {
+//     return godog.Steps{
+//       fmt.Sprintf(`an user named "%s"`, name),
+//       fmt.Sprintf(`user "%s" is authenticated`, name),
+//     }
+//   }
+//
+// These steps will be matched and executed in
+// sequential order. The first one which fails
+// will result in main step failure.
+type Steps []string
+
 // StepDef is a registered step definition
 // contains a StepHandler and regexp which
 // is used to match a step. Args which
@@ -27,6 +43,7 @@ type StepDef struct {
 	hv      reflect.Value
 	Expr    *regexp.Regexp
 	Handler interface{}
+	nested  bool
 }
 
 func (sd *StepDef) definitionID() string {

suite.go

@@ -100,6 +100,12 @@ func (s *Suite) Step(expr interface{}, stepFunc interface{}) {
 		panic(fmt.Sprintf("expected handler to return only one value, but it has: %d", typ.NumOut()))
 	}
 
+	def := &StepDef{
+		Handler: stepFunc,
+		Expr:    regex,
+		hv:      v,
+	}
+
 	typ = typ.Out(0)
 	switch typ.Kind() {
 	case reflect.Interface:
@@ -107,6 +113,7 @@ func (s *Suite) Step(expr interface{}, stepFunc interface{}) {
 			panic(fmt.Sprintf("expected handler to return an error, but got: %s", typ.Kind()))
 		}
 	case reflect.Slice:
+		def.nested = true
 		if typ.Elem().Kind() != reflect.String {
 			panic(fmt.Sprintf("expected handler to return []string for multistep, but got: []%s", typ.Kind()))
 		}
@@ -114,11 +121,7 @@ func (s *Suite) Step(expr interface{}, stepFunc interface{}) {
 		panic(fmt.Sprintf("expected handler to return an error or []string, but got: %s", typ.Kind()))
 	}
 
-	s.steps = append(s.steps, &StepDef{
-		Handler: stepFunc,
-		Expr:    regex,
-		hv:      v,
-	})
+	s.steps = append(s.steps, def)
 }
 
 // BeforeSuite registers a function or method
@@ -197,27 +200,20 @@ func (s *Suite) run() {
 }
 
 func (s *Suite) matchStep(step *gherkin.Step) *StepDef {
-	for _, h := range s.steps {
-		if m := h.Expr.FindStringSubmatch(step.Text); len(m) > 0 {
-			var args []interface{}
-			for _, m := range m[1:] {
-				args = append(args, m)
+	def := s.matchStepText(step.Text)
+	if def != nil && step.Argument != nil {
+		def.args = append(def.args, step.Argument)
 	}
-			if step.Argument != nil {
-				args = append(args, step.Argument)
-			}
-			h.args = args
-			return h
-		}
-	}
-	// @TODO can handle ambiguous
-	return nil
+	return def
 }
 
 func (s *Suite) runStep(step *gherkin.Step, prevStepErr error) (err error) {
 	match := s.matchStep(step)
 	s.fmt.Defined(step, match)
-	if match == nil {
+
+	// @TODO custom undefined err here to pass step text for snippet
+	// @TODO user multistep definitions may panic
+	if s.maybeUndefined(match) {
 		s.fmt.Undefined(step)
 		return ErrUndefined
 	}
@@ -227,11 +223,6 @@ func (s *Suite) runStep(step *gherkin.Step, prevStepErr error) (err error) {
 		return nil
 	}
 
-	// run before step handlers
-	for _, f := range s.beforeStepHandlers {
-		f(step)
-	}
-
 	defer func() {
 		if e := recover(); e != nil {
 			err = &traceError{
@@ -254,10 +245,32 @@ func (s *Suite) runStep(step *gherkin.Step, prevStepErr error) (err error) {
 		}
 	}()
 
+	// run before step handlers
+	for _, f := range s.beforeStepHandlers {
+		f(step)
+	}
+
 	err = s.maybeSubSteps(match.run())
 	return
 }
 
+func (s *Suite) maybeUndefined(step *StepDef) bool {
+	if nil == step {
+		return true
+	}
+
+	if !step.nested {
+		return false
+	}
+
+	for _, text := range step.run().(Steps) {
+		if s.maybeUndefined(s.matchStepText(text)) {
+			return true
+		}
+	}
+	return false
+}
+
 func (s *Suite) maybeSubSteps(result interface{}) error {
 	if nil == result {
 		return nil
@@ -267,33 +280,32 @@ func (s *Suite) maybeSubSteps(result interface{}) error {
 		return err
 	}
 
-	steps, ok := result.([]string)
+	steps, ok := result.(Steps)
 	if !ok {
 		return fmt.Errorf("unexpected error, should have been []string: %T - %+v", result, result)
 	}
 
-	for _, step := range steps {
-		var def *StepDef
+	for _, text := range steps {
+		if def := s.matchStepText(text); def == nil {
+			return ErrUndefined
+		} else if err := s.maybeSubSteps(def.run()); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *Suite) matchStepText(text string) *StepDef {
 	for _, h := range s.steps {
-			if m := h.Expr.FindStringSubmatch(step); len(m) > 0 {
+		if m := h.Expr.FindStringSubmatch(text); len(m) > 0 {
 			var args []interface{}
 			for _, m := range m[1:] {
 				args = append(args, m)
 			}
+
+			// @TODO copy step def
 			h.args = args
-				def = h
-				break
-			}
-		}
-
-		if def == nil {
-			return ErrUndefined
-		}
-
-		// @TODO: step hooks only take gherkin.Step
-		// @TODO: cannot call formatter to register step execution either
-		if err := s.maybeSubSteps(def.run()); err != nil {
-			return err
+			return h
 		}
 	}
 	return nil

suite_test.go

@@ -89,6 +89,21 @@ func SuiteContext(s *Suite) {
 	// Introduced to test formatter/cucumber.feature
 	s.Step(`^the rendered json will be as follows:$`, c.theRenderJSONWillBe)
 
+	s.Step(`^failing multistep$`, func() Steps {
+		return Steps{"passing step", "failing step"}
+	})
+
+	s.Step(`^undefined multistep$`, func() Steps {
+		return Steps{"passing step", "undefined step", "passing step"}
+	})
+
+	s.Step(`^passing multistep$`, func() Steps {
+		return Steps{"passing step", "passing step", "passing step"}
+	})
+
+	s.Step(`^failing nested multistep$`, func() Steps {
+		return Steps{"passing step", "passing multistep", "failing multistep"}
+	})
 }
 
 type firedEvent struct {