added codabar test

codabar/encoder_test.go

@@ -0,0 +1,29 @@
+package codabar
+
+import (
+	"image/color"
+	"testing"
+)
+
+func Test_Encode(t *testing.T) {
+	_, err := Encode("FOOBAR")
+	if err == nil {
+		t.Error("\"FOOBAR\" should not be encodable")
+	}
+
+	code, err := Encode("A40156B")
+	if err != nil || code == nil {
+		t.Fail()
+	} else {
+		testResult := "10110010010101101001010101001101010110010110101001010010101101010010011"
+		if code.Bounds().Max.X != len(testResult) {
+			t.Error("length missmatch")
+		} else {
+			for i, r := range testResult {
+				if (code.At(i, 0) == color.Black) != (r == '1') {
+					t.Errorf("code missmatch on position %d", i)
+				}
+			}
+		}
+	}
+}