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// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.
package sql
import (
"database/sql"
"database/sql/driver"
"testing"
"github.com/DATA-DOG/go-sqlmock"
"github.com/google/uuid"
"github.com/stretchr/testify/require"
)
func TestScanSlice(t *testing.T) {
mock := sqlmock.NewRows([]string{"name"}).
AddRow("foo").
AddRow("bar")
var v0 []string
require.NoError(t, ScanSlice(toRows(mock), &v0))
require.Equal(t, []string{"foo", "bar"}, v0)
mock = sqlmock.NewRows([]string{"age"}).
AddRow(1).
AddRow(2)
var v1 []int
require.NoError(t, ScanSlice(toRows(mock), &v1))
require.Equal(t, []int{1, 2}, v1)
mock = sqlmock.NewRows([]string{"name", "COUNT(*)"}).
AddRow("foo", 1).
AddRow("bar", 2)
var v2 []struct {
Name string
Count int
}
require.NoError(t, ScanSlice(toRows(mock), &v2))
require.Equal(t, "foo", v2[0].Name)
require.Equal(t, "bar", v2[1].Name)
require.Equal(t, 1, v2[0].Count)
require.Equal(t, 2, v2[1].Count)
mock = sqlmock.NewRows([]string{"nick_name", "COUNT(*)"}).
AddRow("foo", 1).
AddRow("bar", 2)
var v3 []struct {
Count int
Name string `json:"nick_name"`
}
require.NoError(t, ScanSlice(toRows(mock), &v3))
require.Equal(t, "foo", v3[0].Name)
require.Equal(t, "bar", v3[1].Name)
require.Equal(t, 1, v3[0].Count)
require.Equal(t, 2, v3[1].Count)
mock = sqlmock.NewRows([]string{"nick_name", "COUNT(*)"}).
AddRow("foo", 1).
AddRow("bar", 2)
var v4 []*struct {
Count int
Name string `json:"nick_name"`
Ignored string `json:"string"`
}
require.NoError(t, ScanSlice(toRows(mock), &v4))
require.Equal(t, "foo", v4[0].Name)
require.Equal(t, "bar", v4[1].Name)
require.Equal(t, 1, v4[0].Count)
require.Equal(t, 2, v4[1].Count)
mock = sqlmock.NewRows([]string{"nick_name", "COUNT(*)"}).
AddRow("foo", 1).
AddRow("bar", 2)
var v5 []*struct {
Count int
Name string `json:"name" sql:"nick_name"`
}
require.NoError(t, ScanSlice(toRows(mock), &v5))
require.Equal(t, "foo", v5[0].Name)
require.Equal(t, "bar", v5[1].Name)
require.Equal(t, 1, v5[0].Count)
require.Equal(t, 2, v5[1].Count)
mock = sqlmock.NewRows([]string{"age", "name"}).
AddRow(1, nil).
AddRow(nil, "a8m")
var v6 []struct {
Age NullInt64
Name NullString
}
require.NoError(t, ScanSlice(toRows(mock), &v6))
require.EqualValues(t, 1, v6[0].Age.Int64)
require.False(t, v6[0].Name.Valid)
require.False(t, v6[1].Age.Valid)
require.Equal(t, "a8m", v6[1].Name.String)
u1, u2 := uuid.New().String(), uuid.New().String()
mock = sqlmock.NewRows([]string{"ids"}).
AddRow([]byte(u1)).
AddRow([]byte(u2))
var ids []uuid.UUID
require.NoError(t, ScanSlice(toRows(mock), &ids))
require.Equal(t, u1, ids[0].String())
require.Equal(t, u2, ids[1].String())
mock = sqlmock.NewRows([]string{"pids"}).
AddRow([]byte(u1)).
AddRow([]byte(u2))
var pids []*uuid.UUID
require.NoError(t, ScanSlice(toRows(mock), &pids))
require.Equal(t, u1, pids[0].String())
require.Equal(t, u2, pids[1].String())
mock = sqlmock.NewRows([]string{"id", "first", "last"}).
AddRow(10, "Ariel", "Mashraki")
err := ScanSlice(toRows(mock), nil)
require.EqualError(t, err, "sql/scan: ScanSlice(nil)")
type P struct {
_ int
ID int
First string
Last string
}
var p []P
err = ScanSlice(toRows(mock), p)
require.EqualError(t, err, "sql/scan: ScanSlice(non-pointer []sql.P)")
require.NoError(t, ScanSlice(toRows(mock), &p))
require.Equal(t, 10, p[0].ID)
require.Equal(t, "Ariel", p[0].First)
require.Equal(t, "Mashraki", p[0].Last)
var pp []struct{ _, id int }
mock = sqlmock.NewRows([]string{"id"}).
AddRow(10)
err = ScanSlice(toRows(mock), &pp)
require.EqualError(t, err, "sql/scan: missing struct field for column: id (id)")
require.Empty(t, pp)
}
func TestScanNestedStruct(t *testing.T) {
mock := sqlmock.NewRows([]string{"name", "age"}).
AddRow("foo", 1).
AddRow("bar", 2).
AddRow("baz", nil)
type T struct{ Name string }
var v []struct {
T
Age int
}
require.NoError(t, ScanSlice(toRows(mock), &v))
require.Equal(t, "foo", v[0].Name)
require.Equal(t, 1, v[0].Age)
require.Equal(t, "bar", v[1].Name)
require.Equal(t, 2, v[1].Age)
require.Equal(t, "baz", v[2].Name)
require.Equal(t, 0, v[2].Age)
mock = sqlmock.NewRows([]string{"name", "age"}).
AddRow("foo", 1).
AddRow("bar", nil)
type T1 struct{ Name **string }
var v1 []struct {
T1
Age *int
}
require.NoError(t, ScanSlice(toRows(mock), &v1))
require.Equal(t, "foo", **v1[0].Name)
require.Equal(t, "bar", **v1[1].Name)
require.Equal(t, 1, *v1[0].Age)
require.Nil(t, v1[1].Age)
}
func TestScanSlicePtr(t *testing.T) {
mock := sqlmock.NewRows([]string{"name"}).
AddRow("foo").
AddRow("bar")
var v0 []*string
require.NoError(t, ScanSlice(toRows(mock), &v0))
require.Equal(t, "foo", *v0[0])
require.Equal(t, "bar", *v0[1])
mock = sqlmock.NewRows([]string{"age"}).
AddRow(1).
AddRow(2)
var v1 []**int
require.NoError(t, ScanSlice(toRows(mock), &v1))
require.Equal(t, 1, **v1[0])
require.Equal(t, 2, **v1[1])
mock = sqlmock.NewRows([]string{"age", "name"}).
AddRow(1, "a8m").
AddRow(2, "nati")
var v2 []*struct {
Age *int
Name **string
}
require.NoError(t, ScanSlice(toRows(mock), &v2))
require.Equal(t, 1, *v2[0].Age)
require.Equal(t, "a8m", **v2[0].Name)
require.Equal(t, 2, *v2[1].Age)
require.Equal(t, "nati", **v2[1].Name)
}
func TestScanInt64(t *testing.T) {
mock := sqlmock.NewRows([]string{"age"}).
AddRow("10").
AddRow("20")
n, err := ScanInt64(toRows(mock))
require.Error(t, err)
require.Zero(t, n)
mock = sqlmock.NewRows([]string{"age", "count"}).
AddRow("10", "1")
n, err = ScanInt64(toRows(mock))
require.Error(t, err)
require.Zero(t, n)
mock = sqlmock.NewRows([]string{"count"}).
AddRow(10)
n, err = ScanInt64(toRows(mock))
require.NoError(t, err)
require.EqualValues(t, 10, n)
mock = sqlmock.NewRows([]string{"count"}).
AddRow("10")
n, err = ScanInt64(toRows(mock))
require.NoError(t, err)
require.EqualValues(t, 10, n)
}
func TestScanValue(t *testing.T) {
mock := sqlmock.NewRows([]string{"count"}).
AddRow(10)
n, err := ScanValue(toRows(mock))
require.NoError(t, err)
require.EqualValues(t, 10, n)
}
func TestScanOne(t *testing.T) {
mock := sqlmock.NewRows([]string{"name"}).
AddRow("10").
AddRow("20")
err := ScanOne(toRows(mock), new(string))
require.Error(t, err, "multiple lines")
mock = sqlmock.NewRows([]string{"name"}).
AddRow("10")
err = ScanOne(toRows(mock), "")
require.Error(t, err, "not a pointer")
mock = sqlmock.NewRows([]string{"name"}).
AddRow("10")
var s string
err = ScanOne(toRows(mock), &s)
require.NoError(t, err)
require.Equal(t, "10", s)
}
func TestInterface(t *testing.T) {
mock := sqlmock.NewRows([]string{"age"}).
AddRow("10").
AddRow("20")
var values []driver.Value
err := ScanSlice(toRows(mock), &values)
require.NoError(t, err)
require.Equal(t, []driver.Value{"10", "20"}, values)
mock = sqlmock.NewRows([]string{"age"}).
AddRow(10).
AddRow(20)
values = values[:0:0]
err = ScanSlice(toRows(mock), &values)
require.NoError(t, err)
require.Equal(t, []driver.Value{int64(10), int64(20)}, values)
}
func toRows(mrows *sqlmock.Rows) *sql.Rows {
db, mock, _ := sqlmock.New()
mock.ExpectQuery("").WillReturnRows(mrows)
rows, _ := db.Query("")
return rows
}
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