mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 23:55:39 +00:00
Daniel Martí
a0692d74af
First, add a headless boolean flag that defaults to true. That way, one can run 'go test -headless=false' to, for example, see how Chrome runs the webassembly endtoend test. Second, skip the Chrome test if the browser isn't installed. While at it, run 'gofmt -s' on the package. Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
111 lines
3.0 KiB
Go
111 lines
3.0 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package main_test
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import (
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"bytes"
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"context"
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"errors"
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"flag"
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"image/png"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"os/exec"
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"testing"
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"github.com/chromedp/chromedp"
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_ "gioui.org/unit" // the build tool adds it to go.mod, so keep it there
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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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func TestJSOnChrome(t *testing.T) {
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// First, build the app.
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dir, err := ioutil.TempDir("", "gio-endtoend-js")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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// TODO(mvdan): This is inefficient, as we link the gogio tool every time.
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// Consider options in the future. On the plus side, this is simple.
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cmd := exec.Command("go", "run", ".", "-target=js", "-o="+dir, "testdata/red.go")
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Fatalf("could not build app: %s:\n%s", err, out)
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}
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// Second, start Chrome.
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opts := append(chromedp.DefaultExecAllocatorOptions[:],
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chromedp.Flag("headless", *headless),
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// We need use-gl=egl instead of the default of use-gl=desktop;
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// "desktop" doesn't seem to work when we're in headless mode.
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// TODO(mvdan): Does egl require a GPU? If so, consider
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// use-gl=swiftshader, which will use CPU-based rendering. That
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// might be necessary for some CI or headless environments.
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chromedp.Flag("use-gl", "egl"),
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)
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actx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
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defer cancel()
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ctx, cancel := chromedp.NewContext(actx)
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defer cancel()
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if err := chromedp.Run(ctx); err != nil {
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if errors.Is(err, exec.ErrNotFound) {
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t.Skipf("test requires Chrome to be installed: %v", err)
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return
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}
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t.Fatal(err)
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}
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// Third, serve the app folder, set the browser tab dimensions, and
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// navigate to the folder.
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ts := httptest.NewServer(http.FileServer(http.Dir(dir)))
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defer ts.Close()
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if err := chromedp.Run(ctx,
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// A small window with 2x HiDPI.
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chromedp.EmulateViewport(300, 300, chromedp.EmulateScale(2.0)),
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chromedp.Navigate(ts.URL),
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); err != nil {
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t.Fatal(err)
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}
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// Finally, run the test.
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// 1: Once the canvas is ready, grab a screenshot to check that the
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// entirety of the viewport is red, as per the background color.
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var buf []byte
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if err := chromedp.Run(ctx,
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chromedp.WaitReady("canvas", chromedp.ByQuery),
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chromedp.CaptureScreenshot(&buf),
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); err != nil {
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t.Fatal(err)
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}
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img, err := png.Decode(bytes.NewReader(buf))
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if err != nil {
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t.Fatal(err)
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}
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size := img.Bounds().Size()
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wantSize := 600 // 300px at 2.0 scaling factor
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if size.X != wantSize || size.Y != wantSize {
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t.Fatalf("expected dimensions to be %d*%d, got %d*%d",
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wantSize, wantSize, size.X, size.Y)
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}
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wantColor := func(x, y int, r, g, b, a uint32) {
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color := img.At(x, y)
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r_, g_, b_, a_ := color.RGBA()
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if r_ != r || g_ != g || b_ != b || a_ != a {
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t.Errorf("got 0x%04x%04x%04x%04x at (%d,%d), want 0x%04x%04x%04x%04x",
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r_, g_, b_, a_, x, y, r, g, b, a)
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}
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}
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wantColor(5, 5, 0xffff, 0x0, 0x0, 0xffff)
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wantColor(595, 595, 0xffff, 0x0, 0x0, 0xffff)
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}
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