3 files changed, 79 insertions, 7 deletions
diff --git a/src/exercises/exercise.go b/src/exercises/exercise.go
index 2783381..22700c8 100644
--- a/src/exercises/exercise.go
+++ b/src/exercises/exercise.go
@@ -1,11 +1,29 @@
 package exercises
 
+import (
+	"os"
+	"regexp"
+)
+
+var notDoneRegex = regexp.MustCompile(`(?m)^\s*///?\s*I\s+AM\s+NOT\s+DONE`)
+
 type Exercise struct {
-	Name  string
-	Path  string
-	Mode  string
-	Hint  string
-	State State
+	Name string
+	Path string
+	Mode string
+	Hint string
+}
+
+func (e Exercise) State() State {
+	data, err := os.ReadFile(e.Path)
+	if err != nil {
+		return Pending
+	}
+
+	if notDoneRegex.Match(data) {
+		return Pending
+	}
+	return Done
 }
 
 type State int
diff --git a/src/exercises/exercises_suite_test.go b/src/exercises/exercises_suite_test.go
new file mode 100644
index 0000000..8f163da
--- /dev/null
+++ b/src/exercises/exercises_suite_test.go
@@ -0,0 +1,54 @@
+package exercises_test
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/mauricioabreu/golings/src/exercises"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestExercises(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Exercises Suite")
+}
+
+var _ = Describe("Exercises", func() {
+	Describe("Checking exercise state", func() {
+		When("'I AM NOT DONE' comment is still there", func() {
+			It("has the Pending state", func() {
+				file, err := ioutil.TempFile("/tmp", "exercise*.go")
+				file.Write([]byte(`// exercise1.go
+				// I AM NOT DONE
+				package main
+
+				func main() {
+
+				}
+				`))
+				Expect(err).To(BeNil())
+
+				defer os.Remove(file.Name())
+
+				ex := exercises.Exercise{Path: file.Name()}
+
+				Expect(ex.State()).To(Equal(exercises.Pending))
+			})
+		})
+
+		When("'I AM NOT DONE' comment is not there", func() {
+			It("has the Done state", func() {
+				file, err := ioutil.TempFile("/tmp", "exercise*.go")
+				Expect(err).To(BeNil())
+
+				defer os.Remove(file.Name())
+
+				ex := exercises.Exercise{Path: file.Name()}
+
+				Expect(ex.State()).To(Equal(exercises.Done))
+			})
+		})
+	})
+})
diff --git a/src/printer/list.go b/src/printer/list.go
index bd65513..cd38c9a 100644
--- a/src/printer/list.go
+++ b/src/printer/list.go
@@ -10,9 +10,9 @@ import (
 func PrintList(o io.Writer, exs []exercises.Exercise) {
 	t := table.NewWriter()
 	t.SetOutputMirror(o)
-	t.AppendHeader(table.Row{"Name", "Path"})
+	t.AppendHeader(table.Row{"Name", "Path", "State"})
 	for _, ex := range exs {
-		t.AppendRow(table.Row{ex.Name, ex.Path})
+		t.AppendRow(table.Row{ex.Name, ex.Path, ex.State()})
 	}
 	t.Render()
 }