test: add cmd/bd helper coverage and stabilize test runner

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

cmd/bd/import_helpers_test.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/steveyegge/beads/internal/types"
+)
+
+func TestTouchDatabaseFile_UsesJSONLMtime(t *testing.T) {
+	tmp := t.TempDir()
+	dbPath := filepath.Join(tmp, "beads.db")
+	jsonlPath := filepath.Join(tmp, "issues.jsonl")
+
+	if err := os.WriteFile(dbPath, []byte(""), 0o600); err != nil {
+		t.Fatalf("WriteFile db: %v", err)
+	}
+	if err := os.WriteFile(jsonlPath, []byte("{}\n"), 0o600); err != nil {
+		t.Fatalf("WriteFile jsonl: %v", err)
+	}
+
+	jsonlTime := time.Now().Add(2 * time.Second)
+	if err := os.Chtimes(jsonlPath, jsonlTime, jsonlTime); err != nil {
+		t.Fatalf("Chtimes jsonl: %v", err)
+	}
+
+	if err := TouchDatabaseFile(dbPath, jsonlPath); err != nil {
+		t.Fatalf("TouchDatabaseFile: %v", err)
+	}
+
+	info, err := os.Stat(dbPath)
+	if err != nil {
+		t.Fatalf("Stat db: %v", err)
+	}
+	if info.ModTime().Before(jsonlTime) {
+		t.Fatalf("db mtime %v should be >= jsonl mtime %v", info.ModTime(), jsonlTime)
+	}
+}
+
+func TestImportDetectPrefixFromIssues(t *testing.T) {
+	if detectPrefixFromIssues(nil) != "" {
+		t.Fatalf("expected empty")
+	}
+
+	issues := []*types.Issue{
+		{ID: "test-1"},
+		{ID: "test-2"},
+		{ID: "other-1"},
+	}
+	if got := detectPrefixFromIssues(issues); got != "test" {
+		t.Fatalf("got %q, want %q", got, "test")
+	}
+}
+
+func TestCountLines(t *testing.T) {
+	tmp := t.TempDir()
+	p := filepath.Join(tmp, "f.txt")
+	if err := os.WriteFile(p, []byte("a\n\nb\n"), 0o600); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+	if got := countLines(p); got != 3 {
+		t.Fatalf("countLines=%d, want 3", got)
+	}
+}
+
+func TestCheckUncommittedChanges_Warns(t *testing.T) {
+	_, cleanup := setupGitRepo(t)
+	defer cleanup()
+
+	if err := os.WriteFile("issues.jsonl", []byte("{\"id\":\"test-1\"}\n"), 0o600); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+	_ = execCmd(t, "git", "add", "issues.jsonl")
+	_ = execCmd(t, "git", "commit", "-m", "add issues")
+
+	// Modify without committing.
+	if err := os.WriteFile("issues.jsonl", []byte("{\"id\":\"test-1\"}\n{\"id\":\"test-2\"}\n"), 0o600); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	warn := captureStderr(t, func() {
+		checkUncommittedChanges("issues.jsonl", &ImportResult{})
+	})
+	if !strings.Contains(warn, "uncommitted changes") {
+		t.Fatalf("expected warning, got: %q", warn)
+	}
+
+	noWarn := captureStderr(t, func() {
+		checkUncommittedChanges("issues.jsonl", &ImportResult{Created: 1})
+	})
+	if noWarn != "" {
+		t.Fatalf("expected no warning, got: %q", noWarn)
+	}
+}
+
+func execCmd(t *testing.T, name string, args ...string) string {
+	t.Helper()
+	out, err := exec.Command(name, args...).CombinedOutput()
+	if err != nil {
+		t.Fatalf("%s %v failed: %v\n%s", name, args, err, out)
+	}
+	return string(out)
+}