start to describing godog itself with godog

builder.go

@@ -18,6 +18,7 @@ type builder struct {
 	files    map[string]*ast.File
 	fset     *token.FileSet
 	Contexts []string
+	Internal bool
 	tpl      *template.Template
 }
 
@@ -26,15 +27,14 @@ func newBuilder() *builder {
 		files: make(map[string]*ast.File),
 		fset:  token.NewFileSet(),
 		tpl: template.Must(template.New("main").Parse(`package main
-
+{{ if not .Internal }}import (
-import (
 	"github.com/DATA-DOG/godog"
-)
+){{ end }}
 
 func main() {
-	suite := godog.New()
+	suite := {{ if not .Internal }}godog.{{ end }}New()
-	{{range $c := .Contexts}}
+	{{range .Contexts}}
-		{{$c}}(suite)
+		{{ . }}(suite)
 	{{end}}
 	suite.Run()
 }`)),
@@ -46,6 +46,10 @@ func (b *builder) parseFile(path string) error {
 	if err != nil {
 		return err
 	}
+	// mark godog package as internal
+	if f.Name.Name == "godog" && !b.Internal {
+		b.Internal = true
+	}
 	b.deleteMainFunc(f)
 	b.registerSteps(f)
 	b.deleteImports(f)

features/suite.feature

@@ -0,0 +1,9 @@
+Feature: godog bdd suite
+  In order to test application behavior
+  As a suite
+  I need to be able to register and run features
+
+  Scenario:
+    Given a feature path "features"
+    When I parse features
+    Then I should have 1 feature file

gherkin/example/ls_test.go

@@ -1,28 +0,0 @@
-package main
-
-import (
-	"regexp"
-
-	"github.com/DATA-DOG/godog"
-)
-
-type lsFeature struct{}
-
-func (s *lsFeature) inDirectory(args ...godog.Arg) error {
-	return nil
-}
-
-func (s *lsFeature) haveFile(args ...godog.Arg) error {
-	return nil
-}
-
-func SuiteContext(g godog.Suite) {
-	f := &lsFeature{}
-
-	g.Step(
-		regexp.MustCompile(`^I am in a directory "([^"]*)"$`),
-		godog.StepHandlerFunc(f.inDirectory))
-	g.Step(
-		regexp.MustCompile(`^I have a file named "([^"]*)"$`),
-		godog.StepHandlerFunc(f.haveFile))
-}

suite.go

@@ -13,14 +13,29 @@ import (
 // the regexp submatch to handle the step
 type Arg string
 
-// Float converts an argument to float64 value
+// Float converts an argument to float64
-// or panics if it does not know how to convert it
+// or panics if unable to convert it
 func (a Arg) Float() float64 {
 	v, err := strconv.ParseFloat(string(a), 64)
 	if err == nil {
 		return v
 	}
-	panic(fmt.Sprintf(`cannot convert string "%s" to float64: %s`, a, err))
+	panic(fmt.Sprintf(`cannot convert "%s" to float64: %s`, a, err))
+}
+
+// Int converts an argument to int64
+// or panics if unable to convert it
+func (a Arg) Int() int64 {
+	v, err := strconv.ParseInt(string(a), 10, 0)
+	if err == nil {
+		return v
+	}
+	panic(fmt.Sprintf(`cannot convert "%s" to int64: %s`, a, err))
+}
+
+// String converts an argument to string
+func (a Arg) String() string {
+	return string(a)
 }
 
 // Objects implementing the StepHandler interface can be
@@ -97,4 +112,63 @@ func (s *suite) Run() {
 
 	fmt.Println("running", cl("godog", cyan)+", num registered steps:", cl(len(s.steps), yellow))
 	fmt.Println("have loaded", cl(len(s.features), yellow), "features from path:", cl(cfg.featuresPath, green))
+
+	for _, f := range s.features {
+		s.runFeature(f)
+	}
+}
+
+func (s *suite) runFeature(f *gherkin.Feature) {
+	for _, scenario := range f.Scenarios {
+		if f.Background != nil {
+			for _, step := range f.Background.Steps {
+				var handler StepHandler
+				var args []Arg
+				for r, h := range s.steps {
+					if m := r.FindStringSubmatch(step.Text); len(m) > 0 {
+						handler = h
+						for _, a := range m[1:] {
+							args = append(args, Arg(a))
+						}
+						break
+					}
+				}
+				if handler != nil {
+					if err := handler.HandleStep(args...); err != nil {
+						// @TODO: scenario fails, step failed
+						fmt.Println("ERR")
+					} else {
+						fmt.Println("OK")
+					}
+					// @TODO: handle panic and recover
+				} else {
+					fmt.Println("PENDING")
+				}
+			}
+		}
+		for _, step := range scenario.Steps {
+			var handler StepHandler
+			var args []Arg
+			for r, h := range s.steps {
+				if m := r.FindStringSubmatch(step.Text); len(m) > 0 {
+					handler = h
+					for _, a := range m[1:] {
+						args = append(args, Arg(a))
+					}
+					break
+				}
+			}
+			if handler != nil {
+				if err := handler.HandleStep(args...); err != nil {
+					// @TODO: scenario fails, step failed
+					fmt.Println("ERR")
+				} else {
+					fmt.Println("OK")
+				}
+				// @TODO: handle panic and recover
+			} else {
+				fmt.Println("PENDING")
+			}
+		}
+	}
 }

suite_test.go

@@ -0,0 +1,45 @@
+package godog
+
+import (
+	"fmt"
+	"regexp"
+)
+
+type suiteFeature struct {
+	suite
+}
+
+func (s *suiteFeature) featurePath(args ...Arg) error {
+	cfg.featuresPath = args[0].String()
+	return nil
+}
+
+func (s *suiteFeature) parseFeatures(args ...Arg) (err error) {
+	s.features, err = cfg.features()
+	return
+}
+
+func (s *suiteFeature) numParsed(args ...Arg) (err error) {
+	if len(s.features) != int(args[0].Int()) {
+		err = fmt.Errorf("expected %d features to be parsed, but have %d", args[0].Int(), len(s.features))
+	}
+	return
+}
+
+func SuiteContext(g Suite) {
+	s := &suiteFeature{
+		suite: suite{
+			steps: make(map[*regexp.Regexp]StepHandler),
+		},
+	}
+
+	g.Step(
+		regexp.MustCompile(`^a feature path "([^"]*)"$`),
+		StepHandlerFunc(s.featurePath))
+	g.Step(
+		regexp.MustCompile(`^I parse features$`),
+		StepHandlerFunc(s.parseFeatures))
+	g.Step(
+		regexp.MustCompile(`^I should have ([\d]+) features? files?$`),
+		StepHandlerFunc(s.numParsed))
+}