mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Daniel Martí
4e71f195ab
This vastly simplifies our code, and saves us the ugly math. While at it, establish that a TestDriver must have a white background, which is already satisfied by both existing implementations. Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
105 lines
3.4 KiB
Go
105 lines
3.4 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package main_test
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import (
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"flag"
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"image"
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"testing"
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)
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var headless = flag.Bool("headless", true, "run end-to-end tests in headless mode")
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// TestDriver is implemented by each of the platforms we can run end-to-end
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// tests on. None of its methods return any errors, as the errors are directly
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// reported to testing.T via methods like Fatal.
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type TestDriver interface {
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// Start provides the test driver with a testing.T, as well as the path
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// to the Gio app to use for the test. The app will be run with the
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// given width and height, and the platform's background should be
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// white.
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//
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// When the function returns, the gio app must be ready to use on the
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// platform.
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//
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// The returned cleanup funcs must be run in reverse order, to mimic
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// deferred funcs.
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// TODO(mvdan): replace with testing.T.Cleanup once Go 1.14 is out.
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Start(t *testing.T, path string, width, height int) (cleanups []func())
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// Screenshot takes a screenshot of the Gio app on the platform.
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Screenshot() image.Image
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}
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func runEndToEndTest(t *testing.T, driver TestDriver) {
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width, height := 800, 600
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cleanups := driver.Start(t, "testdata/red.go", width, height)
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// We expect to receive a 800x600px screenshot.
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img := driver.Screenshot()
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size := img.Bounds().Size()
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if size.X != width || size.Y != height {
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t.Fatalf("expected dimensions to be %d*%d, got %d*%d",
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width, height, size.X, size.Y)
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}
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// The colors are split in four rectangular sections. Check the corners
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// of each of the sections. We check the corners left to right, top to
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// bottom, like when reading left-to-right text.
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// The top left should be 0xdeadbe.
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{
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minX, minY := 5, 5
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maxX, maxY := (width/2)-5, (height/2)-5
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wantColor(t, img, minX, minY, 0xdede, 0xadad, 0xbebe)
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wantColor(t, img, maxX, minY, 0xdede, 0xadad, 0xbebe)
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wantColor(t, img, minX, maxY, 0xdede, 0xadad, 0xbebe)
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wantColor(t, img, maxX, maxY, 0xdede, 0xadad, 0xbebe)
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}
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// The top right should be 0xffffff.
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{
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minX, minY := (width/2)+5, 5
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maxX, maxY := width-5, (height/2)-5
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wantColor(t, img, minX, minY, 0xffff, 0xffff, 0xffff)
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wantColor(t, img, maxX, minY, 0xffff, 0xffff, 0xffff)
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wantColor(t, img, minX, maxY, 0xffff, 0xffff, 0xffff)
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wantColor(t, img, maxX, maxY, 0xffff, 0xffff, 0xffff)
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}
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// The bottom left should be 0x000000.
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{
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minX, minY := 5, (height/2)+5
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maxX, maxY := (width/2)-5, height-5
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wantColor(t, img, minX, minY, 0x0000, 0x0000, 0x0000)
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wantColor(t, img, maxX, minY, 0x0000, 0x0000, 0x0000)
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wantColor(t, img, minX, maxY, 0x0000, 0x0000, 0x0000)
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wantColor(t, img, maxX, maxY, 0x0000, 0x0000, 0x0000)
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}
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// The bottom right is black (0x000000) with 0x80 alpha, so we should
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// see gray (0xbbbbbb).
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{
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minX, minY := (width/2)+5, (height/2)+5
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maxX, maxY := width-5, height-5
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wantColor(t, img, minX, minY, 0xbbbb, 0xbbbb, 0xbbbb)
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wantColor(t, img, maxX, minY, 0xbbbb, 0xbbbb, 0xbbbb)
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wantColor(t, img, minX, maxY, 0xbbbb, 0xbbbb, 0xbbbb)
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wantColor(t, img, maxX, maxY, 0xbbbb, 0xbbbb, 0xbbbb)
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}
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// Run the cleanup funcs from last to first, as if they were defers.
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for i := len(cleanups) - 1; i >= 0; i-- {
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cleanups[i]()
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}
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}
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func wantColor(t *testing.T, img image.Image, x, y int, r, g, b uint32) {
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color := img.At(x, y)
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r_, g_, b_, _ := color.RGBA()
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if r_ != r || g_ != g || b_ != b {
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t.Errorf("got 0x%04x%04x%04x at (%d,%d), want 0x%04x%04x%04x",
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r_, g_, b_, x, y, r, g, b)
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}
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}
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