mirror of https://github.com/mum4k/termdash.git
717 lines
16 KiB
Go
717 lines
16 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package canvas
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import (
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"image"
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"testing"
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"github.com/kylelemons/godebug/pretty"
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"github.com/mum4k/termdash/area"
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"github.com/mum4k/termdash/cell"
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"github.com/mum4k/termdash/terminal/faketerm"
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)
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func TestNew(t *testing.T) {
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tests := []struct {
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desc string
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area image.Rectangle
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wantSize image.Point
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wantArea image.Rectangle
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wantErr bool
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}{
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{
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desc: "area min has negative X",
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area: image.Rect(-1, 0, 0, 0),
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wantErr: true,
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},
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{
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desc: "area min has negative Y",
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area: image.Rect(0, -1, 0, 0),
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wantErr: true,
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},
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{
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desc: "area max has negative X",
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area: image.Rect(0, 0, -1, 0),
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wantErr: true,
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},
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{
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desc: "area max has negative Y",
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area: image.Rect(0, 0, 0, -1),
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wantErr: true,
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},
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{
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desc: "zero area is invalid",
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area: image.Rect(0, 0, 0, 0),
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wantErr: true,
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},
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{
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desc: "smallest valid size",
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area: image.Rect(0, 0, 1, 1),
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wantSize: image.Point{1, 1},
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wantArea: image.Rect(0, 0, 1, 1),
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},
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{
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desc: "rectangular canvas 3 by 4",
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area: image.Rect(0, 0, 3, 4),
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wantSize: image.Point{3, 4},
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wantArea: image.Rect(0, 0, 3, 4),
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},
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{
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desc: "non-zero based area",
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area: image.Rect(1, 1, 2, 3),
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wantSize: image.Point{1, 2},
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wantArea: image.Rect(0, 0, 1, 2),
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},
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}
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for _, tc := range tests {
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t.Run(tc.desc, func(t *testing.T) {
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c, err := New(tc.area)
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if (err != nil) != tc.wantErr {
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t.Errorf("New => unexpected error: %v, wantErr: %v", err, tc.wantErr)
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}
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if err != nil {
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return
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}
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gotSize := c.Size()
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if diff := pretty.Compare(tc.wantSize, gotSize); diff != "" {
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t.Errorf("Size => unexpected diff (-want, +got):\n%s", diff)
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}
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gotArea := c.Area()
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if diff := pretty.Compare(tc.wantArea, gotArea); diff != "" {
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t.Errorf("Area => unexpected diff (-want, +got):\n%s", diff)
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}
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})
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}
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}
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func TestSetCellAndApply(t *testing.T) {
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tests := []struct {
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desc string
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termSize image.Point
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canvasArea image.Rectangle
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point image.Point
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r rune
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opts []cell.Option
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want cell.Buffer // Expected back buffer in the fake terminal.
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wantCells int
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wantSetCellErr bool
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wantApplyErr bool
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}{
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{
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desc: "setting cell outside the designated area",
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termSize: image.Point{2, 2},
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canvasArea: image.Rect(0, 0, 1, 1),
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point: image.Point{0, 2},
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wantSetCellErr: true,
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},
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{
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desc: "sets a top-left corner cell",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{0, 0},
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r: 'X',
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New('X'),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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},
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},
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{
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desc: "sets a full-width rune in the top-left corner cell",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{0, 0},
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r: '界',
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wantCells: 2,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New('界'),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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},
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},
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{
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desc: "not enough space for a full-width rune",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{1, 0},
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r: '界',
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wantSetCellErr: true,
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},
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{
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desc: "sets a top-right corner cell",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{1, 0},
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r: 'X',
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New('X'),
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cell.New(0),
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},
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},
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},
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{
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desc: "sets a bottom-left corner cell",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{0, 1},
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r: 'X',
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New('X'),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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},
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},
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{
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desc: "sets a bottom-right corner cell",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{1, 1},
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r: 'Z',
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New('Z'),
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},
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},
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},
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{
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desc: "sets cell options",
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termSize: image.Point{3, 3},
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canvasArea: image.Rect(1, 1, 3, 3),
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point: image.Point{1, 1},
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r: 'A',
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opts: []cell.Option{
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cell.BgColor(cell.ColorRed),
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},
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New('A', cell.BgColor(cell.ColorRed)),
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},
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},
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},
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{
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desc: "canvas size equals terminal size",
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termSize: image.Point{1, 1},
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canvasArea: image.Rect(0, 0, 1, 1),
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point: image.Point{0, 0},
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r: 'A',
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wantCells: 1,
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want: cell.Buffer{
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{
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cell.New('A'),
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},
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},
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},
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{
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desc: "terminal too small for the area",
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termSize: image.Point{1, 1},
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canvasArea: image.Rect(0, 0, 2, 2),
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point: image.Point{0, 0},
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r: 'A',
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wantCells: 1,
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wantApplyErr: true,
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},
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}
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for _, tc := range tests {
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t.Run(tc.desc, func(t *testing.T) {
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c, err := New(tc.canvasArea)
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if err != nil {
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t.Fatalf("New => unexpected error: %v", err)
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}
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gotCells, err := c.SetCell(tc.point, tc.r, tc.opts...)
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if (err != nil) != tc.wantSetCellErr {
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t.Errorf("SetCell => unexpected error: %v, wantSetCellErr: %v", err, tc.wantSetCellErr)
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}
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if err != nil {
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return
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}
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if gotCells != tc.wantCells {
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t.Errorf("SetCell => unexpected number of cells %d, want %d", gotCells, tc.wantCells)
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}
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ft, err := faketerm.New(tc.termSize)
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if err != nil {
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t.Fatalf("faketerm.New => unexpected error: %v", err)
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}
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err = c.Apply(ft)
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if (err != nil) != tc.wantApplyErr {
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t.Errorf("Apply => unexpected error: %v, wantApplyErr: %v", err, tc.wantApplyErr)
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}
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if err != nil {
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return
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}
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got := ft.BackBuffer()
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if diff := pretty.Compare(tc.want, got); diff != "" {
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t.Errorf("faketerm.BackBuffer => unexpected diff (-want, +got):\n%s", diff)
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}
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})
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}
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}
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func TestClear(t *testing.T) {
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c, err := New(image.Rect(1, 1, 3, 3))
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if err != nil {
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t.Fatalf("New => unexpected error: %v", err)
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}
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if _, err := c.SetCell(image.Point{0, 0}, 'X'); err != nil {
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t.Fatalf("SetCell => unexpected error: %v", err)
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}
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ft, err := faketerm.New(image.Point{3, 3})
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if err != nil {
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t.Fatalf("faketerm.New => unexpected error: %v", err)
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}
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// Set one cell outside of the canvas on the terminal.
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if err := ft.SetCell(image.Point{0, 0}, 'A'); err != nil {
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t.Fatalf("faketerm.SetCell => unexpected error: %v", err)
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}
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if err := c.Apply(ft); err != nil {
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t.Fatalf("Apply => unexpected error: %v", err)
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}
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want := cell.Buffer{
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{
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cell.New('A'),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New('X'),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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}
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got := ft.BackBuffer()
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if diff := pretty.Compare(want, got); diff != "" {
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t.Errorf("faketerm.BackBuffer before Clear => unexpected diff (-want, +got):\n%s", diff)
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}
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// Call Clear(), Apply() and verify that only the area belonging to the
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// canvas was cleared.
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if err := c.Clear(); err != nil {
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t.Fatalf("Clear => unexpected error: %v", err)
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}
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if err := c.Apply(ft); err != nil {
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t.Fatalf("Apply => unexpected error: %v", err)
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}
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want = cell.Buffer{
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{
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cell.New('A'),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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{
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cell.New(0),
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cell.New(0),
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cell.New(0),
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},
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}
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got = ft.BackBuffer()
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if diff := pretty.Compare(want, got); diff != "" {
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t.Errorf("faketerm.BackBuffer after Clear => unexpected diff (-want, +got):\n%s", diff)
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}
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}
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// TestApplyFullWidthRunes verifies that when applying a full-width rune to the
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// terminal, canvas doesn't touch the neighbor cell that holds the remaining
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// part of the full-width rune.
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func TestApplyFullWidthRunes(t *testing.T) {
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ar := image.Rect(0, 0, 3, 3)
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c, err := New(ar)
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if err != nil {
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t.Fatalf("New => unexpected error: %v", err)
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}
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fullP := image.Point{0, 0}
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if _, err := c.SetCell(fullP, '界'); err != nil {
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t.Fatalf("SetCell => unexpected error: %v", err)
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}
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ft, err := faketerm.New(area.Size(ar))
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if err != nil {
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t.Fatalf("faketerm.New => unexpected error: %v", err)
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}
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partP := image.Point{1, 0}
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if err := ft.SetCell(partP, 'A'); err != nil {
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t.Fatalf("faketerm.SetCell => unexpected error: %v", err)
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}
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if err := c.Apply(ft); err != nil {
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t.Fatalf("Apply => unexpected error: %v", err)
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}
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want, err := cell.NewBuffer(area.Size(ar))
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if err != nil {
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t.Fatalf("NewBuffer => unexpected error: %v", err)
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}
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want[fullP.X][fullP.Y].Rune = '界'
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want[partP.X][partP.Y].Rune = 'A'
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got := ft.BackBuffer()
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if diff := pretty.Compare(want, got); diff != "" {
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t.Errorf("faketerm.BackBuffer => unexpected diff (-want, +got):\n%s", diff)
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}
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}
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func TestCell(t *testing.T) {
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tests := []struct {
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desc string
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cvs func() (*Canvas, error)
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point image.Point
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want *cell.Cell
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wantErr bool
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}{
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{
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desc: "requested point falls outside of the canvas",
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cvs: func() (*Canvas, error) {
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cvs, err := New(image.Rect(0, 0, 1, 1))
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if err != nil {
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return nil, err
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}
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return cvs, nil
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},
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point: image.Point{1, 1},
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wantErr: true,
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},
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{
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desc: "returns the cell",
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cvs: func() (*Canvas, error) {
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cvs, err := New(image.Rect(0, 0, 2, 2))
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if err != nil {
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return nil, err
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}
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if _, err := cvs.SetCell(
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image.Point{1, 1}, 'A',
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cell.FgColor(cell.ColorRed),
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cell.BgColor(cell.ColorBlue),
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); err != nil {
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return nil, err
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}
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return cvs, nil
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},
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point: image.Point{1, 1},
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want: &cell.Cell{
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Rune: 'A',
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Opts: cell.NewOptions(
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cell.FgColor(cell.ColorRed),
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cell.BgColor(cell.ColorBlue),
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),
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},
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},
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}
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for _, tc := range tests {
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t.Run(tc.desc, func(t *testing.T) {
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cvs, err := tc.cvs()
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if err != nil {
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t.Fatalf("tc.cvs => unexpected error: %v", err)
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}
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got, err := cvs.Cell(tc.point)
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if (err != nil) != tc.wantErr {
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t.Errorf("Cell => unexpected error: %v, wantErr: %v", err, tc.wantErr)
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}
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if err != nil {
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return
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}
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if diff := pretty.Compare(tc.want, got); diff != "" {
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t.Errorf("Cell => unexpected diff (-want, +got):\n%s", diff)
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}
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})
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}
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}
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|
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// mustNew creates a new Canvas or panics.
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func mustNew(ar image.Rectangle) *Canvas {
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c, err := New(ar)
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if err != nil {
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panic(err)
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}
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return c
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}
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// mustFill fills the canvas with the specified runes or panics.
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func mustFill(c *Canvas, r rune) {
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ar := c.Area()
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for col := 0; col < ar.Max.X; col++ {
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for row := 0; row < ar.Max.Y; row++ {
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if _, err := c.SetCell(image.Point{col, row}, r); err != nil {
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panic(err)
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}
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}
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}
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}
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// mustSetCell sets cell at the specified point of the canvas or panics.
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func mustSetCell(c *Canvas, p image.Point, r rune, opts ...cell.Option) {
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if _, err := c.SetCell(p, r, opts...); err != nil {
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panic(err)
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}
|
|
}
|
|
|
|
func TestCopyTo(t *testing.T) {
|
|
tests := []struct {
|
|
desc string
|
|
src *Canvas
|
|
dst *Canvas
|
|
want *Canvas
|
|
wantErr bool
|
|
}{
|
|
{
|
|
desc: "fails when the canvas doesn't fit",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustFill(c, 'X')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 2, 2)),
|
|
want: mustNew(image.Rect(0, 0, 3, 3)),
|
|
wantErr: true,
|
|
},
|
|
{
|
|
desc: "fails when the area lies outside of the destination canvas",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(3, 3, 4, 4))
|
|
mustFill(c, 'X')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 3, 3)),
|
|
want: mustNew(image.Rect(0, 0, 3, 3)),
|
|
wantErr: true,
|
|
},
|
|
{
|
|
desc: "copies zero based same size canvases",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustFill(c, 'X')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 3, 3)),
|
|
want: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustSetCell(c, image.Point{0, 0}, 'X')
|
|
mustSetCell(c, image.Point{1, 0}, 'X')
|
|
mustSetCell(c, image.Point{2, 0}, 'X')
|
|
|
|
mustSetCell(c, image.Point{0, 1}, 'X')
|
|
mustSetCell(c, image.Point{1, 1}, 'X')
|
|
mustSetCell(c, image.Point{2, 1}, 'X')
|
|
|
|
mustSetCell(c, image.Point{0, 2}, 'X')
|
|
mustSetCell(c, image.Point{1, 2}, 'X')
|
|
mustSetCell(c, image.Point{2, 2}, 'X')
|
|
return c
|
|
}(),
|
|
},
|
|
{
|
|
desc: "copies smaller canvas with an offset",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(1, 1, 2, 2))
|
|
mustFill(c, 'X')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 3, 3)),
|
|
want: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustSetCell(c, image.Point{1, 1}, 'X')
|
|
return c
|
|
}(),
|
|
},
|
|
{
|
|
desc: "copies smaller canvas with an offset into a canvas with offset from terminal",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(1, 1, 2, 2))
|
|
mustFill(c, 'X')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(3, 3, 6, 6)),
|
|
want: func() *Canvas {
|
|
c := mustNew(image.Rect(3, 3, 6, 6))
|
|
mustSetCell(c, image.Point{1, 1}, 'X')
|
|
return c
|
|
}(),
|
|
},
|
|
{
|
|
desc: "copies cell options",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 1, 1))
|
|
mustSetCell(c, image.Point{0, 0}, 'X',
|
|
cell.FgColor(cell.ColorRed),
|
|
cell.BgColor(cell.ColorBlue),
|
|
)
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 3, 1)),
|
|
want: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 1))
|
|
mustSetCell(c, image.Point{0, 0}, 'X',
|
|
cell.FgColor(cell.ColorRed),
|
|
cell.BgColor(cell.ColorBlue),
|
|
)
|
|
return c
|
|
}(),
|
|
},
|
|
{
|
|
desc: "copies cells with full-width runes",
|
|
src: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustSetCell(c, image.Point{0, 0}, '界')
|
|
mustSetCell(c, image.Point{1, 1}, '界')
|
|
return c
|
|
}(),
|
|
dst: mustNew(image.Rect(0, 0, 3, 3)),
|
|
want: func() *Canvas {
|
|
c := mustNew(image.Rect(0, 0, 3, 3))
|
|
mustSetCell(c, image.Point{0, 0}, '界')
|
|
mustSetCell(c, image.Point{1, 1}, '界')
|
|
return c
|
|
}(),
|
|
},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
err := tc.src.CopyTo(tc.dst)
|
|
if (err != nil) != tc.wantErr {
|
|
t.Errorf("CopyTo => unexpected error: %v, wantErr: %v", err, tc.wantErr)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
ftSize := image.Point{10, 10}
|
|
got, err := faketerm.New(ftSize)
|
|
if err != nil {
|
|
t.Fatalf("faketerm.New(tc.dst.Size()) => unexpected error: %v", err)
|
|
}
|
|
if err := tc.dst.Apply(got); err != nil {
|
|
t.Fatalf("tc.dst.Apply => unexpected error: %v", err)
|
|
}
|
|
|
|
want, err := faketerm.New(ftSize)
|
|
if err != nil {
|
|
t.Fatalf("faketerm.New(tc.want.Size()) => unexpected error: %v", err)
|
|
}
|
|
|
|
if err := tc.want.Apply(want); err != nil {
|
|
t.Fatalf("tc.want.Apply => unexpected error: %v", err)
|
|
}
|
|
|
|
if diff := faketerm.Diff(want, got); diff != "" {
|
|
t.Errorf("CopyTo => %v", diff)
|
|
}
|
|
})
|
|
}
|
|
}
|