feat: add command to run next pending exercise

7 files changed, 65 insertions, 3 deletions

diff --git a/golings/cmd/cmd_suite_test.go b/golings/cmd/cmd_suite_test.go
index 92f77b1..ef06880 100644
--- a/golings/cmd/cmd_suite_test.go
+++ b/golings/cmd/cmd_suite_test.go
@@ -68,6 +68,16 @@ var _ = Describe("Commands", func() {
 					Expect(err).To(HaveOccurred())
 				})
 			})
+			When("'next' is passed is argument to the command", func() {
+				It("runs the next pending exercise", func() {
+					run := cmd.RunCmd("../fixtures/next/info.toml")
+					run.SetArgs([]string{"next"})
+
+					err := run.Execute()
+
+					Expect(err).To(HaveOccurred())
+				})
+			})
 		})
 	})
 })
diff --git a/golings/cmd/run.go b/golings/cmd/run.go
index 1efd905..552c234 100644
--- a/golings/cmd/run.go
+++ b/golings/cmd/run.go
@@ -19,10 +19,18 @@ func RunCmd(infoFile string) *cobra.Command {
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		RunE: func(cmd *cobra.Command, args []string) error {
+			var exercise exercises.Exercise
+			var err error
+			if args[0] == "next" {
+				exercise, err = exercises.NextPending(infoFile)
+			} else {
+				exercise, err = exercises.Find(args[0], infoFile)
+			}
+
 			spinner := progressbar.NewOptions(
 				-1, // a negative number makes turns the progress bar into a spinner
 				progressbar.OptionEnableColorCodes(true),
-				progressbar.OptionSetDescription(color.WhiteString("Running exercise: %s", args[0])),
+				progressbar.OptionSetDescription(color.WhiteString("Running exercise: %s", exercise.Name)),
 				progressbar.OptionOnCompletion(func() {
 					color.White("\nRunning complete!\n\n")
 				}),
@@ -34,7 +42,6 @@ func RunCmd(infoFile string) *cobra.Command {
 				}
 			}()
 
-			exercise, err := exercises.Find(args[0], infoFile)
 			if errors.Is(err, exercises.ErrExerciseNotFound) {
 				color.White("No exercise found for '%s'", args[0])
 				return err
diff --git a/golings/exercises/list.go b/golings/exercises/list.go
index 31ebdd4..c466bfa 100644
--- a/golings/exercises/list.go
+++ b/golings/exercises/list.go
@@ -8,6 +8,7 @@ import (
 )
 
 var ErrExerciseNotFound = errors.New("exercise not found")
+var ErrNoPendingExercises = errors.New("no pending exercises")
 
 type Info struct {
 	Exercises []Exercise
@@ -28,6 +29,21 @@ func List(infoFile string) ([]Exercise, error) {
 	return info.Exercises, nil
 }
 
+func NextPending(infoFile string) (Exercise, error) {
+	allExercises, err := List(infoFile)
+	if err != nil {
+		return Exercise{}, err
+	}
+
+	for _, exercise := range allExercises {
+		if exercise.State() == Pending {
+			return exercise, nil
+		}
+	}
+
+	return Exercise{}, ErrNoPendingExercises
+}
+
 func Find(exercise string, infoFile string) (Exercise, error) {
 	exs, err := List(infoFile)
 	if err != nil {
diff --git a/golings/exercises/runner.go b/golings/exercises/runner.go
index c9597f6..17b5f61 100644
--- a/golings/exercises/runner.go
+++ b/golings/exercises/runner.go
@@ -19,7 +19,9 @@ func (e Exercise) Run() (Result, error) {
 	cmd.Stdout = &stdout
 	cmd.Stderr = &stderr
 
-	return Result{Exercise: e, Out: stdout.String(), Err: stderr.String()}, cmd.Run()
+	err := cmd.Run()
+
+	return Result{Exercise: e, Out: stdout.String(), Err: stderr.String()}, err
 }
 
 func BuildArgs(e Exercise) []string {
diff --git a/golings/fixtures/next/info.toml b/golings/fixtures/next/info.toml
new file mode 100644
index 0000000..f3e04c7
--- /dev/null
+++ b/golings/fixtures/next/info.toml
@@ -0,0 +1,11 @@
+[[exercises]]
+name = "next1"
+path = "../fixtures/next/next1/main.go"
+mode = "compile"
+hint = ""
+
+[[exercises]]
+name = "next1"
+path = "../fixtures/next/next2/main.go"
+mode = "compile"
+hint = ""
diff --git a/golings/fixtures/next/next1/main.go b/golings/fixtures/next/next1/main.go
new file mode 100644
index 0000000..c93a8e4
--- /dev/null
+++ b/golings/fixtures/next/next1/main.go
@@ -0,0 +1,7 @@
+// next1
+// Make me compile!
+package main
+
+func main() {
+
+}
diff --git a/golings/fixtures/next/next2/main.go b/golings/fixtures/next/next2/main.go
new file mode 100644
index 0000000..1e86e78
--- /dev/null
+++ b/golings/fixtures/next/next2/main.go
@@ -0,0 +1,9 @@
+// next2
+// Make me compile!
+
+// I AM NOT DONE
+package main
+
+func main() {
+
+}