1 files changed, 137 insertions, 0 deletions
diff --git a/internal/executor/claude_test.go b/internal/executor/claude_test.go
index 79f294e..1f6e5be 100644
--- a/internal/executor/claude_test.go
+++ b/internal/executor/claude_test.go
@@ -4,6 +4,8 @@ import (
 	"context"
 	"io"
 	"log/slog"
+	"os"
+	"os/exec"
 	"path/filepath"
 	"runtime"
 	"strings"
@@ -341,3 +343,138 @@ func TestExecOnce_NoGoroutineLeak_OnNaturalExit(t *testing.T) {
 			baseline, after, after-baseline)
 	}
 }
+
+// initGitRepo creates a git repo in dir with one commit so it is clonable.
+func initGitRepo(t *testing.T, dir string) {
+	t.Helper()
+	cmds := [][]string{
+		{"git", "-C", dir, "init"},
+		{"git", "-C", dir, "config", "user.email", "test@test"},
+		{"git", "-C", dir, "config", "user.name", "test"},
+		{"git", "-C", dir, "commit", "--allow-empty", "-m", "init"},
+	}
+	for _, args := range cmds {
+		if out, err := exec.Command(args[0], args[1:]...).CombinedOutput(); err != nil {
+			t.Fatalf("%v: %v\n%s", args, err, out)
+		}
+	}
+}
+
+func TestSandboxCloneSource_PrefersLocalRemote(t *testing.T) {
+	dir := t.TempDir()
+	initGitRepo(t, dir)
+	// Add a "local" remote pointing to a bare repo.
+	bare := t.TempDir()
+	exec.Command("git", "init", "--bare", bare).Run()
+	exec.Command("git", "-C", dir, "remote", "add", "local", bare).Run()
+	exec.Command("git", "-C", dir, "remote", "add", "origin", "https://example.com/repo").Run()
+
+	got := sandboxCloneSource(dir)
+	if got != bare {
+		t.Errorf("expected bare repo path %q, got %q", bare, got)
+	}
+}
+
+func TestSandboxCloneSource_FallsBackToOrigin(t *testing.T) {
+	dir := t.TempDir()
+	initGitRepo(t, dir)
+	originURL := "https://example.com/origin-repo"
+	exec.Command("git", "-C", dir, "remote", "add", "origin", originURL).Run()
+
+	got := sandboxCloneSource(dir)
+	if got != originURL {
+		t.Errorf("expected origin URL %q, got %q", originURL, got)
+	}
+}
+
+func TestSandboxCloneSource_FallsBackToProjectDir(t *testing.T) {
+	dir := t.TempDir()
+	initGitRepo(t, dir)
+	// No remotes configured.
+	got := sandboxCloneSource(dir)
+	if got != dir {
+		t.Errorf("expected projectDir %q (no remotes), got %q", dir, got)
+	}
+}
+
+func TestSetupSandbox_ClonesGitRepo(t *testing.T) {
+	src := t.TempDir()
+	initGitRepo(t, src)
+
+	sandbox, err := setupSandbox(src)
+	if err != nil {
+		t.Fatalf("setupSandbox: %v", err)
+	}
+	t.Cleanup(func() { os.RemoveAll(sandbox) })
+
+	// Verify sandbox is a git repo with at least one commit.
+	out, err := exec.Command("git", "-C", sandbox, "log", "--oneline").Output()
+	if err != nil {
+		t.Fatalf("git log in sandbox: %v", err)
+	}
+	if len(strings.TrimSpace(string(out))) == 0 {
+		t.Error("expected at least one commit in sandbox, got empty log")
+	}
+}
+
+func TestSetupSandbox_InitialisesNonGitDir(t *testing.T) {
+	// A plain directory (not a git repo) should be initialised then cloned.
+	src := t.TempDir()
+
+	sandbox, err := setupSandbox(src)
+	if err != nil {
+		t.Fatalf("setupSandbox on plain dir: %v", err)
+	}
+	t.Cleanup(func() { os.RemoveAll(sandbox) })
+
+	if _, err := os.Stat(filepath.Join(sandbox, ".git")); err != nil {
+		t.Errorf("sandbox should be a git repo: %v", err)
+	}
+}
+
+func TestTeardownSandbox_UncommittedChanges_ReturnsError(t *testing.T) {
+	src := t.TempDir()
+	initGitRepo(t, src)
+	sandbox, err := setupSandbox(src)
+	if err != nil {
+		t.Fatalf("setupSandbox: %v", err)
+	}
+	t.Cleanup(func() { os.RemoveAll(sandbox) })
+
+	// Leave an uncommitted file in the sandbox.
+	if err := os.WriteFile(filepath.Join(sandbox, "dirty.txt"), []byte("oops"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+	err = teardownSandbox(src, sandbox, logger)
+	if err == nil {
+		t.Fatal("expected error for uncommitted changes, got nil")
+	}
+	if !strings.Contains(err.Error(), "uncommitted changes") {
+		t.Errorf("expected 'uncommitted changes' in error, got: %v", err)
+	}
+	// Sandbox should be preserved (not removed) on error.
+	if _, statErr := os.Stat(sandbox); os.IsNotExist(statErr) {
+		t.Error("sandbox was removed despite error; should be preserved for debugging")
+	}
+}
+
+func TestTeardownSandbox_CleanSandboxWithNoNewCommits_RemovesSandbox(t *testing.T) {
+	src := t.TempDir()
+	initGitRepo(t, src)
+	sandbox, err := setupSandbox(src)
+	if err != nil {
+		t.Fatalf("setupSandbox: %v", err)
+	}
+
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+	// Sandbox has no new commits beyond origin; teardown should succeed and remove it.
+	if err := teardownSandbox(src, sandbox, logger); err != nil {
+		t.Fatalf("teardownSandbox: %v", err)
+	}
+	if _, statErr := os.Stat(sandbox); !os.IsNotExist(statErr) {
+		t.Error("sandbox should have been removed after clean teardown")
+		os.RemoveAll(sandbox)
+	}
+}