stream/mts/meta_test.go: added TestDeleteKeyAbsent to check that we get correct err when we try to delete data of key that doesn't exist

stream/mts/meta.go

@@ -83,7 +83,7 @@ func (m *Meta) Delete(key string) error {
 		delete(m.data, key)
 		return nil
 	}
-	return errors.New("Trying to delete map entry that doesn't exist")
+	return errKeyAbsent
 }
 
 func (m *Meta) Encode() []byte {

stream/mts/meta_test.go

@@ -99,7 +99,14 @@ func TestDelete(t *testing.T) {
 		t.Errorf("Did not expect error: %v", err.Error())
 	}
 	if _, err := meta.Get("loc"); err != errKeyAbsent {
-		t.Errorf("Did not get expected err: %v", errKeyAbsent)
+		t.Errorf("Did not get expected err: %v", errKeyAbsent.Error())
+	}
+}
+
+func TestDeleteAbsentKey(t *testing.T) {
+	meta := NewMeta()
+	if err := meta.Delete("loc"); err != errKeyAbsent {
+		t.Errorf("Did not get expected err: %v", errKeyAbsent.Error())
 	}
 }