feat(pierre): sanity check

internal/pierre/judge_test.go

@@ -37,6 +37,15 @@ func (g *mockGit) AddComment(ctx context.Context, owner, repo string, prID int,
 	return nil
 }
 
+func (g *mockGit) GetFileContent(ctx context.Context, owner, repo, path, ref string) (string, error) {
+	// For tests, return a simple placeholder content.
+	return "package main\n\nfunc placeholder() {}", nil
+}
+
+func (g *mockGit) GetPRHeadSHA(ctx context.Context, owner, repo string, prID int) (string, error) {
+	return "dummysha", nil
+}
+
 func TestSplitDiffIntoChunks(t *testing.T) {
 	cases := []struct {
 		name           string