1 files changed, 57 insertions, 0 deletions
diff --git a/wipesides_test.go b/wipesides_test.go
new file mode 100644
index 0000000..d5464e0
--- /dev/null
+++ b/wipesides_test.go
@@ -0,0 +1,57 @@
+package preproc
+
+// TODO: add different pages as test cases
+// TODO: test non integral img version
+
+import (
+	"flag"
+	"fmt"
+	"image"
+	"image/png"
+	"os"
+	"testing"
+)
+
+func TestWipeSides(t *testing.T) {
+	var update = flag.Bool("updatewipe", false, "update golden files")
+	cases := []struct {
+		name   string
+		orig   string
+		golden string
+		thresh float64
+		wsize  int
+	}{
+		{"integralwipesides", "testdata/pg2.png", "testdata/pg2_integralwipesides_t0.02_w5.png", 0.02, 5},
+		{"integralwipesides", "testdata/pg2.png", "testdata/pg2_integralwipesides_t0.05_w5.png", 0.05, 5},
+		{"integralwipesides", "testdata/pg2.png", "testdata/pg2_integralwipesides_t0.05_w25.png", 0.05, 25},
+	}
+
+	for _, c := range cases {
+		t.Run(fmt.Sprintf("%s_%0.2f_%d", c.name, c.thresh, c.wsize), func(t *testing.T) {
+			var actual *image.Gray
+			orig, err := decode(c.orig)
+			if err != nil {
+				t.Fatalf("Could not open file %s: %v\n", c.orig, err)
+			}
+			actual = Wipe(orig, c.wsize, c.thresh)
+			if *update {
+				f, err := os.Create(c.golden)
+				defer f.Close()
+				if err != nil {
+					t.Fatalf("Could not open file %s to update: %v\n", c.golden, err)
+				}
+				err = png.Encode(f, actual)
+				if err != nil {
+					t.Fatalf("Could not encode update of %s: %v\n", c.golden, err)
+				}
+			}
+			golden, err := decode(c.golden)
+			if err != nil {
+				t.Fatalf("Could not open file %s: %v\n", c.golden, err)
+			}
+			if !imgsequal(golden, actual) {
+				t.Errorf("Processed %s differs to %s\n", c.orig, c.golden)
+			}
+		})
+	}
+}