From 6abca706a944a62231608c4a8d8fbdff81f4ca3c Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Mon, 13 May 2019 19:46:27 +0100
Subject: Add -slow flag to test to skip slow tests by default

---
 preproc/helpers_test.go | 56 ------------------------------------------------
 preproc/sauvola_test.go |  6 +++++-
 preproc/test_helpers.go | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+), 57 deletions(-)
 delete mode 100644 preproc/helpers_test.go
 create mode 100644 preproc/test_helpers.go

diff --git a/preproc/helpers_test.go b/preproc/helpers_test.go
deleted file mode 100644
index 326b59d..0000000
--- a/preproc/helpers_test.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package preproc
-
-// TODO: add different pages as test cases
-// TODO: test non integral img version
-
-import (
-	"flag"
-	"image"
-	"image/draw"
-	"image/png"
-	"os"
-)
-
-var update = flag.Bool("update", false, "update golden files")
-
-func decode(s string) (*image.Gray, error) {
-	f, err := os.Open(s)
-	defer f.Close()
-	if err != nil {
-		return nil, err
-	}
-	img, err := png.Decode(f)
-	if err != nil {
-		return nil, err
-	}
-	b := img.Bounds()
-	gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
-	draw.Draw(gray, b, img, b.Min, draw.Src)
-	return gray, nil
-}
-
-func imgsequal(img1 *image.Gray, img2 *image.Gray) bool {
-	b := img1.Bounds()
-	if !b.Eq(img2.Bounds()) {
-		return false
-	}
-	for y := b.Min.Y; y < b.Max.Y; y++ {
-		for x := b.Min.X; x < b.Max.X; x++ {
-			r0, g0, b0, a0 := img1.At(x, y).RGBA()
-			r1, g1, b1, a1 := img2.At(x, y).RGBA()
-			if r0 != r1 {
-				return false
-			}
-			if g0 != g1 {
-				return false
-			}
-			if b0 != b1 {
-				return false
-			}
-			if a0 != a1 {
-				return false
-			}
-		}
-	}
-	return true
-}
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/test_helpers.go b/preproc/test_helpers.go
new file mode 100644
index 0000000..7579e88
--- /dev/null
+++ b/preproc/test_helpers.go
@@ -0,0 +1,57 @@
+package preproc
+
+// TODO: add different pages as test cases
+// TODO: test non integral img version
+
+import (
+	"flag"
+	"image"
+	"image/draw"
+	"image/png"
+	"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) {
+	f, err := os.Open(s)
+	defer f.Close()
+	if err != nil {
+		return nil, err
+	}
+	img, err := png.Decode(f)
+	if err != nil {
+		return nil, err
+	}
+	b := img.Bounds()
+	gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
+	draw.Draw(gray, b, img, b.Min, draw.Src)
+	return gray, nil
+}
+
+func imgsequal(img1 *image.Gray, img2 *image.Gray) bool {
+	b := img1.Bounds()
+	if !b.Eq(img2.Bounds()) {
+		return false
+	}
+	for y := b.Min.Y; y < b.Max.Y; y++ {
+		for x := b.Min.X; x < b.Max.X; x++ {
+			r0, g0, b0, a0 := img1.At(x, y).RGBA()
+			r1, g1, b1, a1 := img2.At(x, y).RGBA()
+			if r0 != r1 {
+				return false
+			}
+			if g0 != g1 {
+				return false
+			}
+			if b0 != b1 {
+				return false
+			}
+			if a0 != a1 {
+				return false
+			}
+		}
+	}
+	return true
+}
-- 
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