Add -slow flag to test to skip slow tests by default

2 files changed, 6 insertions, 1 deletions

diff --git a/preproc/sauvola_test.go b/preproc/sauvola_test.go
index 1397a4f..5582941 100644
--- a/preproc/sauvola_test.go
+++ b/preproc/sauvola_test.go
@@ -35,7 +35,11 @@ func TestBinarization(t *testing.T) {
 			case "integralsauvola":
 				actual = IntegralSauvola(orig, c.ksize, c.wsize)
 			case "sauvola":
-				actual = Sauvola(orig, c.ksize, c.wsize)
+				if *slow {
+					actual = Sauvola(orig, c.ksize, c.wsize)
+				} else {
+					t.Skip("Skipping slow test; use -slow to run it.\n")
+				}
 			default:
 				t.Fatalf("No method %s\n", c.name)
 			}
diff --git a/preproc/helpers_test.go b/preproc/test_helpers.go
index 326b59d..7579e88 100644
--- a/preproc/helpers_test.go
+++ b/preproc/test_helpers.go
@@ -11,6 +11,7 @@ import (
 	"os"
 )
 
+var slow = flag.Bool("slow", false, "include slow tests")
 var update = flag.Bool("update", false, "update golden files")
 
 func decode(s string) (*image.Gray, error) {