feat: define browser domain and application contracts

internal/domain/browser_test.go

@@ -0,0 +1,44 @@
+package domain
+
+import (
+	"errors"
+	"path/filepath"
+	"testing"
+)
+
+func TestLaunchSpecNormalizeCanonicalizesSafeFields(t *testing.T) {
+	profile := filepath.Join(t.TempDir(), "profile")
+	normalized, err := (LaunchSpec{
+		Kind:             BrowserChrome,
+		Executable:       "  chrome.exe  ",
+		UserDataDir:      profile + string(filepath.Separator),
+		ProfileDirectory: " Default ",
+		TargetURL:        " https://example.com/path ",
+		ExtraArgs:        []string{"--no-first-run"},
+	}).Normalize()
+	if err != nil {
+		t.Fatalf("Normalize() error = %v", err)
+	}
+	if normalized.Executable != "chrome.exe" || normalized.UserDataDir != filepath.Clean(profile) || normalized.ProfileDirectory != "Default" || normalized.TargetURL != "https://example.com/path" {
+		t.Fatalf("normalized spec = %#v", normalized)
+	}
+	normalized.ExtraArgs[0] = "changed"
+	if normalized.ExtraArgs[0] == "" {
+		t.Fatal("extra args unexpectedly empty")
+	}
+}
+
+func TestLaunchSpecNormalizeRejectsUnsafeValues(t *testing.T) {
+	base := LaunchSpec{Kind: BrowserEdge, UserDataDir: filepath.Join(t.TempDir(), "profile"), TargetURL: "https://example.com"}
+	cases := []LaunchSpec{
+		{UserDataDir: base.UserDataDir, TargetURL: base.TargetURL},
+		{Kind: base.Kind, UserDataDir: "relative", TargetURL: base.TargetURL},
+		{Kind: base.Kind, UserDataDir: base.UserDataDir, TargetURL: "file:///tmp/test"},
+		{Kind: base.Kind, UserDataDir: base.UserDataDir, TargetURL: "https://user@example.com"},
+	}
+	for i, spec := range cases {
+		if _, err := spec.Normalize(); !errors.Is(err, ErrInvalidLaunchSpec) {
+			t.Errorf("case %d error = %v, want ErrInvalidLaunchSpec", i, err)
+		}
+	}
+}