79 lines
2.5 KiB
Go
79 lines
2.5 KiB
Go
//go:build dev
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package webbundler
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import (
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"errors"
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"net/http/httptest"
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"os"
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"path/filepath"
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"strings"
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"testing"
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esbuild "github.com/evanw/esbuild/pkg/api"
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)
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// errorModule must emit a valid ES module that imports the client's
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// showErrorOverlay and calls it with the error text + file, so a failed
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// transform pops the compile-error overlay instead of just logging.
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func TestErrorModuleShape(t *testing.T) {
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src := errorModule("ui/Broken.tsx", errors.New("Unexpected \"}\" at line 3"))
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for _, want := range []string{
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`from "/@hmr/client"`,
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"showErrorOverlay",
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"__hmrShowError(",
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"ui/Broken.tsx",
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`Unexpected`,
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} {
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if !strings.Contains(src, want) {
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t.Errorf("errorModule() missing %q:\n%s", want, src)
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}
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}
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// It must parse as an ES module (the payload is embedded JSON-as-JS).
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res := esbuild.Transform(src, esbuild.TransformOptions{
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Loader: esbuild.LoaderJS, Format: esbuild.FormatESModule, LogLevel: esbuild.LogLevelSilent,
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})
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if len(res.Errors) > 0 {
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msgs := esbuild.FormatMessages(res.Errors, esbuild.FormatMessagesOptions{})
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t.Fatalf("errorModule() is not valid JS:\n%s\n--- source ---\n%s", strings.Join(msgs, "\n"), src)
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}
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}
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// A source file that fails to compile must be served as the overlay stub (HTTP
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// 200, not a 500 that would tear the module graph), so the browser shows the
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// error and the next save can recover.
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func TestServeModuleCompileErrorServesOverlay(t *testing.T) {
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root, err := filepath.Abs("../..")
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if err != nil {
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t.Fatal(err)
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}
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t.Chdir(root)
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frontendAbs, _ := filepath.Abs(frontendDir)
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tmpSrc := evalSymlinks(t.TempDir())
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// Deliberately broken JSX: an unclosed tag the compiler/esbuild must reject.
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os.WriteFile(filepath.Join(tmpSrc, "Broken.tsx"),
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[]byte("export default function Broken() {\n return <div><span></div>;\n}\n"), 0o644)
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eps, _ := loadVendorManifest(filepath.Join(frontendAbs, "vendor"))
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d := &devServer{hub: newHub(), frontend: frontendAbs, srcRoot: tmpSrc,
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vendor: filepath.Join(frontendAbs, "vendor"), graph: newModuleGraph(),
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vendorCache: map[string][]byte{}, cssTrigger: make(chan struct{}, 1), vendorEntrypoints: eps}
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req := httptest.NewRequest("GET", srcURLPrefix+"Broken.tsx", nil)
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w := httptest.NewRecorder()
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d.serveModule(w, req)
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if w.Code != 200 {
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t.Fatalf("broken module served status %d, want 200 (overlay stub)", w.Code)
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}
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body := w.Body.String()
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for _, want := range []string{"showErrorOverlay", `from "/@hmr/client"`, "Broken.tsx"} {
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if !strings.Contains(body, want) {
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t.Errorf("overlay stub missing %q:\n%s", want, body)
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}
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}
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}
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