Function TestResultReaderValuesHaveSameCapacityAsLength

pgconn/pgconn_test.go:1397–1423

https://github.com/jackc/pgx/issues/859

(t *testing.T)

// https://github.com/jackc/pgx/issues/859
func TestResultReaderValuesHaveSameCapacityAsLength(t *testing.T) {
	t.Parallel()

	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
	defer cancel()

	pgConn, err := pgconn.Connect(ctx, os.Getenv("PGX_TEST_DATABASE"))
	require.NoError(t, err)
	defer closeConn(t, pgConn)

	result := pgConn.ExecParams(ctx, "select $1::text as msg", [][]byte{[]byte("Hello, world")}, nil, nil, nil)
	require.Len(t, result.FieldDescriptions(), 1)
	assert.Equal(t, "msg", result.FieldDescriptions()[0].Name)

	rowCount := 0
	for result.NextRow() {
		rowCount += 1
		assert.Equal(t, "Hello, world", string(result.Values()[0]))
		assert.Equal(t, len(result.Values()[0]), cap(result.Values()[0]))
	}
	assert.Equal(t, 1, rowCount)
	commandTag, err := result.Close()
	assert.Equal(t, "SELECT 1", commandTag.String())
	assert.NoError(t, err)

	ensureConnValid(t, pgConn)
}

// https://github.com/jackc/pgx/issues/1987
func TestResultReaderReadNil(t *testing.T) {