From 336474c6721686c5ce5cbd72f43c2be249287b6c Mon Sep 17 00:00:00 2001
From: Markus Noga <ml@noga.de>
Date: Fri, 19 Jun 2020 01:26:58 +0200
Subject: [PATCH] added first tests for debayering

---
 internal/debayer_test.go | 86 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 internal/debayer_test.go

diff --git a/internal/debayer_test.go b/internal/debayer_test.go
new file mode 100644
index 0000000..4da5199
--- /dev/null
+++ b/internal/debayer_test.go
@@ -0,0 +1,86 @@
+// Copyright (C) 2020 Markus L. Noga
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+package internal
+
+import (
+	"testing"
+)
+
+func TestDebayerBilinearRGGBToRed(t *testing.T) {
+	width, height:=int32(7), int32(11) 
+	data:=make([]float32, width*height)
+	sum:=0
+	for i:=0; i<len(data); i++ {
+		sum+=i
+		data[i]=float32(sum)
+	}
+
+	rs, adjWidth:=DebayerBilinearRGGBToRed(data, width)
+	if adjWidth!=(width&^1)  { t.Errorf("adjWidth=%d; want %d", adjWidth, (width&^1)) }
+	if int32(len(rs))!=(width&^1)*(height&^1) { t.Errorf("len(rs)=%d; want %d", len(rs), (width&^1)*(height&^1)) }
+	adjHeight:=int32(len(rs))/adjWidth
+	for row:=int32(0); row<adjHeight; row+=2 {
+		for col:=int32(0); col<adjWidth; col+=2 {
+			if rs[row*adjWidth+col]!=data[row*width+col] { t.Errorf("rs[%d]=%f; want %f", row*adjWidth+col, rs[row*adjWidth+col], data[row*width+col]) }
+			// FIXME: add other checks
+		}
+	}
+}
+
+func TestDebayerBilinearRGGBToGreen(t *testing.T) {
+	width, height:=int32(11), int32(13) 
+	data:=make([]float32, width*height)
+	sum:=0
+	for i:=0; i<len(data); i++ {
+		sum+=i
+		data[i]=float32(sum)
+	}
+
+	rs, adjWidth:=DebayerBilinearRGGBToGreen(data, width)
+	if adjWidth!=(width&^1)  { t.Errorf("adjWidth=%d; want %d", adjWidth, (width&^1)) }
+	if int32(len(rs))!=(width&^1)*(height&^1) { t.Errorf("len(rs)=%d; want %d", len(rs), (width&^1)*(height&^1)) }
+	adjHeight:=int32(len(rs))/adjWidth
+	for row:=int32(0); row<adjHeight; row+=2 {
+		for col:=int32(0); col<adjWidth; col+=2 {
+			if rs[row*adjWidth+col+1]!=data[row*width+col+1] { t.Errorf("rs[%d]=%f; want %f", row*adjWidth+col+1, rs[row*adjWidth+col+1], data[row*width+col+1]) }
+			if rs[row*adjWidth+col+adjWidth]!=data[row*width+col+width] { t.Errorf("rs[%d]=%f; want %f", row*adjWidth+col+adjWidth, rs[row*adjWidth+col+adjWidth], data[row*width+col+width]) }
+			// FIXME: add other checks
+		}
+	}
+}
+
+func TestDebayerBilinearRGGBToBlue(t *testing.T) {
+	width, height:=int32(13), int32(7) 
+	data:=make([]float32, width*height)
+	sum:=0
+	for i:=0; i<len(data); i++ {
+		sum+=i
+		data[i]=float32(sum)
+	}
+
+	rs, adjWidth:=DebayerBilinearRGGBToBlue(data, width)
+	if adjWidth!=(width&^1)  { t.Errorf("adjWidth=%d; want %d", adjWidth, (width&^1)) }
+	if int32(len(rs))!=(width&^1)*(height&^1) { t.Errorf("len(rs)=%d; want %d", len(rs), (width&^1)*(height&^1)) }
+	adjHeight:=int32(len(rs))/adjWidth
+	for row:=int32(0); row<adjHeight; row+=2 {
+		for col:=int32(0); col<adjWidth; col+=2 {
+			if rs[row*adjWidth+col+adjWidth+1]!=data[row*width+col+width+1] { t.Errorf("rs[%d]=%f; want %f", row*adjWidth+col+adjWidth+1, rs[row*adjWidth+col+adjWidth+1], data[row*width+col+width+1]) }
+			// FIXME: add other checks
+		}
+	}
+}
+