Replace Python launcher with native Go UI

cmd/barnard-ui/files_test.go

@@ -0,0 +1,98 @@
+package main
+
+import (
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"syscall"
+	"testing"
+	"time"
+)
+
+func TestInitializePathsCreatesProtectedEmptyLog(t *testing.T) {
+	root := t.TempDir()
+	paths := Paths{
+		ConfigDir: filepath.Join(root, "config"),
+		CacheDir:  filepath.Join(root, "cache"),
+		LogFile:   filepath.Join(root, "cache", "barnard-ui.log"),
+	}
+	if err := initialize_paths(paths); err != nil {
+		t.Fatal(err)
+	}
+	info, err := os.Stat(paths.LogFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Mode().Perm() != 0600 || info.Size() != 0 {
+		t.Fatalf("log mode and size = %o, %d; want 600, 0", info.Mode().Perm(), info.Size())
+	}
+}
+
+func TestRunExternalForwardsTerminationSignal(t *testing.T) {
+	sleep, err := exec.LookPath("sleep")
+	if err != nil {
+		t.Skip("sleep is not installed")
+	}
+	ui := &TerminalUI{termination: make(chan os.Signal, 1)}
+	ui.termination <- syscall.SIGTERM
+	started := time.Now()
+	err = run_external(ui, exec.Command(sleep, "30"))
+	var signalErr *terminalSignalError
+	if !errors.As(err, &signalErr) || signalErr.signal != syscall.SIGTERM {
+		t.Fatalf("run_external error = %v; want SIGTERM error", err)
+	}
+	if time.Since(started) > 5*time.Second {
+		t.Fatal("run_external did not promptly terminate the child")
+	}
+}
+
+func TestRunExternalReportsChildSignal(t *testing.T) {
+	shell, err := exec.LookPath("sh")
+	if err != nil {
+		t.Skip("sh is not installed")
+	}
+	ui := &TerminalUI{termination: make(chan os.Signal, 1)}
+	err = run_external(ui, exec.Command(shell, "-c", "kill -TERM $$"))
+	var signalErr *terminalSignalError
+	if !errors.As(err, &signalErr) || signalErr.signal != syscall.SIGTERM {
+		t.Fatalf("run_external error = %v; want child SIGTERM error", err)
+	}
+}
+
+func TestWritePasswordFilePreservesPasswordAndMode(t *testing.T) {
+	path, err := write_password_file(t.TempDir(), " secret value ")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(path)
+	contents, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(contents) != " secret value " {
+		t.Fatalf("password contents = %q", string(contents))
+	}
+	info, err := os.Stat(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Mode().Perm() != 0600 {
+		t.Fatalf("password file mode = %o; want 600", info.Mode().Perm())
+	}
+}
+
+func TestExpandUserPath(t *testing.T) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		t.Fatal(err)
+	}
+	got, err := expand_user_path("~/certificate.pem")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := filepath.Join(home, "certificate.pem")
+	if got != want {
+		t.Fatalf("expanded path = %q; want %q", got, want)
+	}
+}