Update semaphore pattern

semaphore/semaphore_test.go

@@ -0,0 +1,30 @@
+package semaphore_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/tmrts/go-patterns/semaphore"
+)
+
+func TestCreatesSemaphore(t *testing.T) {
+	tickets, timeout := 1, 3*time.Second
+	s := semaphore.New(tickets, timeout)
+
+	if err := s.Acquire(); err != nil {
+		t.Errorf("semaphore.Acquire() got errors %s", err)
+	}
+
+	if err := s.Release(); err != nil {
+		t.Errorf("semaphore.Release() got errors %s", err)
+	}
+}
+
+func TestCreatesNonBlockingSemaphore(t *testing.T) {
+	tickets, timeout := 0, 0
+	s := semaphore.New(tickets, timeout)
+
+	if err := s.Acquire(); err != semaphore.ErrIllegalRelease {
+		t.Errorf("non-blocking semaphore.Acquire() expected error %s got %s", semaphore.ErrIllegalRelease, err)
+	}
+}