defer rc.Close()
			b, err := io.ReadAll(rc)
			if err != nil {
				t.Fatal(err)
			}
			return b
		}
	}
	t.Fatal(file, "not found in testdata/testdata.zip")
	return nil
}

func TestReadExtended(t *testing.T) {
	cases := []struct {
		file            string
		recordDelimiter string
		fieldDelimiter  string
		header          bool
		wantColumns     []string
		wantTenFields   string