mirror of https://github.com/mum4k/termdash.git
78 lines
2.5 KiB
Go
78 lines
2.5 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 testcanvas provides helpers for tests that use the canvas package.
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package testcanvas
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import (
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"fmt"
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"image"
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"github.com/mum4k/termdash/cell"
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"github.com/mum4k/termdash/private/canvas"
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"github.com/mum4k/termdash/private/canvas/buffer"
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"github.com/mum4k/termdash/private/faketerm"
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)
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// MustNew returns a new canvas or panics.
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func MustNew(area image.Rectangle) *canvas.Canvas {
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cvs, err := canvas.New(area)
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if err != nil {
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panic(fmt.Sprintf("canvas.New => unexpected error: %v", err))
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}
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return cvs
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}
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// MustApply applies the canvas on the terminal or panics.
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func MustApply(c *canvas.Canvas, t *faketerm.Terminal) {
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if err := c.Apply(t); err != nil {
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panic(fmt.Sprintf("canvas.Apply => unexpected error: %v", err))
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}
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}
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// MustSetCell sets the cell value or panics. Returns the number of cells the
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// rune occupies, wide runes can occupy multiple cells when printed on the
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// terminal. See http://www.unicode.org/reports/tr11/.
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func MustSetCell(c *canvas.Canvas, p image.Point, r rune, opts ...cell.Option) int {
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cells, err := c.SetCell(p, r, opts...)
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if err != nil {
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panic(fmt.Sprintf("canvas.SetCell => unexpected error: %v", err))
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}
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return cells
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}
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// MustSetAreaCells sets the cells in the area or panics.
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func MustSetAreaCells(c *canvas.Canvas, cellArea image.Rectangle, r rune, opts ...cell.Option) {
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if err := c.SetAreaCells(cellArea, r, opts...); err != nil {
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panic(fmt.Sprintf("canvas.SetAreaCells => unexpected error: %v", err))
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}
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}
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// MustCell returns the cell or panics.
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func MustCell(c *canvas.Canvas, p image.Point) *buffer.Cell {
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cell, err := c.Cell(p)
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if err != nil {
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panic(fmt.Sprintf("canvas.Cell => unexpected error: %v", err))
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}
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return cell
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}
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// MustCopyTo copies the content of the source canvas onto the destination
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// canvas or panics.
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func MustCopyTo(src, dst *canvas.Canvas) {
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if err := src.CopyTo(dst); err != nil {
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panic(fmt.Sprintf("canvas.CopyTo => unexpected error: %v", err))
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}
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}
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