feat: publish the Sandwich Hime source preview

Signed-off-by: Cole Speelman <gamertan@noreply.localhost>

internal/devserver/watch_test.go

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+
+package devserver
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestSnapshotWatchesSourcesAssetsAndStopsAtNestedModules(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	writeWatchFile(t, filepath.Join(root, "main.go"), "package main")
+	writeWatchFile(t, filepath.Join(root, "views", "home.sando"), "<h1>home</h1>")
+	writeWatchFile(t, filepath.Join(root, "views", "home.sando.go"), "// generated")
+	writeWatchFile(t, filepath.Join(root, "notes.txt"), "not watched")
+	writeWatchFile(t, filepath.Join(root, "assets", "site.css"), "body{}")
+	writeWatchFile(t, filepath.Join(root, "nested", "go.mod"), "module nested.test")
+	writeWatchFile(t, filepath.Join(root, "nested", "ignored.go"), "package ignored")
+
+	cfg := DefaultConfig()
+	cfg.SourceRoots = []string{"views"}
+	cfg.AdditionalWatchRoots = []string{"assets"}
+	snapshot, err := takeSnapshot(makeWatchRoots(root, cfg))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{"main.go", filepath.Join("views", "home.sando"), filepath.Join("assets", "site.css")} {
+		if _, ok := snapshot[filepath.Join(root, want)]; !ok {
+			t.Errorf("snapshot does not contain %s", want)
+		}
+	}
+	for _, unwanted := range []string{"notes.txt", filepath.Join("views", "home.sando.go"), filepath.Join("nested", "go.mod"), filepath.Join("nested", "ignored.go")} {
+		if _, ok := snapshot[filepath.Join(root, unwanted)]; ok {
+			t.Errorf("snapshot unexpectedly contains %s", unwanted)
+		}
+	}
+
+	before := snapshot
+	writeWatchFile(t, filepath.Join(root, "assets", "site.css"), "body{color:green}")
+	after, err := takeSnapshot(makeWatchRoots(root, cfg))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if snapshotsEqual(before, after) {
+		t.Fatal("asset change was not detected")
+	}
+}
+
+func writeWatchFile(t *testing.T, path, contents string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
+		t.Fatal(err)
+	}
+}