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147 lines
3.4 KiB
Go
147 lines
3.4 KiB
Go
// Copyright 2021 The Periph Authors. All rights reserved.
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// Use of this source code is governed under the Apache License, Version 2.0
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// that can be found in the LICENSE file.
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package waveshare2in13v2
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import (
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"bytes"
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"image"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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"periph.io/x/devices/v3/ssd1306/image1bit"
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)
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type record struct {
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cmd byte
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data []byte
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}
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type fakeController []record
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func (r *fakeController) sendCommand(cmd byte) {
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*r = append(*r, record{
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cmd: cmd,
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})
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}
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func (r *fakeController) sendData(data []byte) {
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cur := &(*r)[len(*r)-1]
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cur.data = append(cur.data, data...)
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}
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func TestDrawSpec(t *testing.T) {
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for _, tc := range []struct {
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name string
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opts drawOpts
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want drawSpec
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}{
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{
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name: "empty",
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},
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{
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name: "smaller than display",
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opts: drawOpts{
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devSize: image.Pt(100, 200),
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dstRect: image.Rect(17, 4, 25, 8),
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},
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want: drawSpec{
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DstRect: image.Rect(17, 4, 25, 8),
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MemRect: image.Rect(2, 4, 4, 8),
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BufferSize: image.Pt(16, 4),
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BufferRect: image.Rect(1, 0, 9, 4),
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},
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},
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{
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name: "larger than display",
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opts: drawOpts{
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devSize: image.Pt(100, 200),
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dstRect: image.Rect(-20, 50, 125, 300),
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},
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want: drawSpec{
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DstRect: image.Rect(0, 50, 100, 200),
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MemRect: image.Rect(0, 50, 13, 200),
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BufferSize: image.Pt(13*8, 150),
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BufferRect: image.Rect(0, 0, 100, 150),
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},
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},
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} {
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t.Run(tc.name, func(t *testing.T) {
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got := tc.opts.spec()
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if diff := cmp.Diff(got, tc.want, cmpopts.EquateEmpty()); diff != "" {
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t.Errorf("spec() difference (-got +want):\n%s", diff)
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}
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})
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}
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}
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func TestDrawImage(t *testing.T) {
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for _, tc := range []struct {
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name string
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opts drawOpts
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want []record
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}{
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{
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name: "empty",
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opts: drawOpts{
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src: &image.Uniform{image1bit.On},
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},
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},
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{
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name: "partial",
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opts: drawOpts{
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cmd: writeRAMBW,
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devSize: image.Pt(64, 64),
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dstRect: image.Rect(17, 4, 41, 8),
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src: &image.Uniform{image1bit.On},
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srcPts: image.Pt(0, 0),
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},
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want: []record{
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{cmd: dataEntryModeSetting, data: []byte{0x3}},
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{cmd: setRAMXAddressStartEndPosition, data: []byte{2, 6 - 1}},
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{cmd: setRAMYAddressStartEndPosition, data: []byte{4, 0, 8 - 1, 0}},
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{cmd: setRAMXAddressCounter, data: []byte{2}},
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{cmd: setRAMYAddressCounter, data: []byte{4, 0}},
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{
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cmd: writeRAMBW,
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data: bytes.Repeat([]byte{0x7f, 0xff, 0xff, 0x80}, 4),
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},
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},
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},
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{
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name: "full",
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opts: drawOpts{
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cmd: writeRAMBW,
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devSize: image.Pt(80, 120),
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dstRect: image.Rect(0, 0, 80, 120),
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src: &image.Uniform{image1bit.On},
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srcPts: image.Pt(33, 44),
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},
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want: []record{
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{cmd: dataEntryModeSetting, data: []byte{0x3}},
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{cmd: setRAMXAddressStartEndPosition, data: []byte{0, 10 - 1}},
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{cmd: setRAMYAddressStartEndPosition, data: []byte{0, 0, 120 - 1, 0}},
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{cmd: setRAMXAddressCounter, data: []byte{0}},
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{cmd: setRAMYAddressCounter, data: []byte{0, 0}},
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{
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cmd: writeRAMBW,
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data: bytes.Repeat([]byte{0xff}, 80/8*120),
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},
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},
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},
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} {
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t.Run(tc.name, func(t *testing.T) {
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var got fakeController
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drawImage(&got, &tc.opts)
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if diff := cmp.Diff([]record(got), tc.want, cmpopts.EquateEmpty(), cmp.AllowUnexported(record{})); diff != "" {
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t.Errorf("drawImage() difference (-got +want):\n%s", diff)
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}
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})
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}
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}
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