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package sqlh_test
import (
"encoding/json"
"reflect"
"testing"
"time"
"github.com/DATA-DOG/go-sqlmock"
"github.com/stretchr/testify/assert"
"github.com/nofeaturesonlybugs/errors"
"github.com/nofeaturesonlybugs/set"
"github.com/nofeaturesonlybugs/sqlh"
"github.com/nofeaturesonlybugs/sqlh/examples"
)
func TestScanner_StructSliceQueryError(t *testing.T) {
// Tests Query(...) returns non-nil error when dest is []struct.
//
chk := assert.New(t)
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(mock)
chk.NotNil(db)
{ // When dest is []struct and query returns error
mock.ExpectQuery("select +").WillReturnError(errors.Errorf("[]struct query error"))
type Dest struct {
A string
}
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{},
}
var d []Dest
err = scanner.Select(db, &d, "select * from table")
chk.Error(err)
}
}
func TestScanner_StructSliceRowsErrNonNil(t *testing.T) {
// Tests that *sql.Rows.Err() != nil after the for...*sql.Rows.Next() {} loop when dest is a []struct.
//
chk := assert.New(t)
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(mock)
chk.NotNil(db)
{
// When dest is []struct and *sql.Rows.Err() is non-nil
rows := sqlmock.NewRows([]string{"A"}).
AddRow("a").AddRow("b").AddRow("c").
RowError(2, errors.Errorf("[]struct *sql.Rows.Err() is non-nil"))
mock.ExpectQuery("select +").WillReturnRows(rows)
type Dest struct {
A string
}
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{},
}
var d []Dest
err = scanner.Select(db, &d, "select * from table")
chk.Error(err)
}
}
func TestScanner_SelectScalarTime(t *testing.T) {
// Tests selecting into a dest of time.Time.
//
chk := assert.New(t)
//
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{
Tags: []string{"json"},
},
}
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(db)
chk.NotNil(mock)
{
// scalar time
rv := time.Now()
dataRows := sqlmock.NewRows([]string{"tm"})
dataRows.AddRow(rv)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
//
var n time.Time
err = scanner.Select(db, &n, "select max(*) as tm from foo")
chk.NoError(err)
chk.True(rv.Equal(n))
}
}
func TestScanner_SelectScalarSlice(t *testing.T) {
// Tests selecting into a dest of []time.Time.
chk := assert.New(t)
//
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{
Tags: []string{"json"},
},
}
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(db)
chk.NotNil(mock)
{
// scalar time
row1 := time.Now()
row2 := row1.Add(-1 * time.Hour)
dataRows := sqlmock.NewRows([]string{"tm"})
dataRows.AddRow(row1)
dataRows.AddRow(row2)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
//
var n []time.Time
err = scanner.Select(db, &n, "select max(*) as tm from foo")
chk.NoError(err)
chk.True(row1.Equal(n[0]))
chk.True(row2.Equal(n[1]))
}
}
func TestScanner_SingleStruct(t *testing.T) {
// Tests various errors when scanning into a single struct.
chk := assert.New(t)
//
type Dest struct {
A string `json:"a"`
B int `json:"b"`
}
//
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{
Tags: []string{"json"},
},
}
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(db)
chk.NotNil(mock)
{
// query returns error
mock.ExpectQuery("select (.+)").WillReturnError(errors.Errorf("oops"))
//
var d Dest
err = scanner.Select(db, &d, "select a, b from foo")
chk.Error(err)
}
{ // columns error
dataRows := sqlmock.NewRows([]string{"a", "b", "c"})
dataRows.AddRow("Hello", 42, "not found")
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
//
var d Dest
err = scanner.Select(db, &d, "select a, b, c from foo")
chk.Error(err)
}
{ // scan error
dataRows := sqlmock.NewRows([]string{"a", "b"})
dataRows.AddRow("Hello", "asdf")
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
//
var d Dest
err = scanner.Select(db, &d, "select a, b, c from foo")
chk.Error(err)
}
}
func TestScanner_Select_Errors(t *testing.T) {
db, mock, _ := sqlmock.New()
type Dest struct {
A int
B int
}
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{},
}
t.Run("nil dest", func(t *testing.T) {
chk := assert.New(t)
err := scanner.Select(db, nil, "select * from test")
chk.Error(err)
})
t.Run("invalid dest", func(t *testing.T) {
chk := assert.New(t)
var d map[string]interface{}
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
})
t.Run("readonly dest", func(t *testing.T) {
chk := assert.New(t)
var d Dest
err := scanner.Select(db, d, "select * from test")
chk.Error(err)
})
t.Run("struct column mismatch", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"X", "Y"})
dataRows.AddRow(1, 2)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d Dest
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("struct column mismatch", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"X", "Y"})
dataRows.AddRow(1, 2)
dataRows.AddRow(3, 4)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d []Dest
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("struct rows first scan fails", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"A", "B"})
dataRows.AddRow("a", "b")
dataRows.AddRow(3, 4)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d []Dest
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("struct rows second scan fails", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"A", "B"})
dataRows.AddRow(3, 4)
dataRows.AddRow("a", "b")
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d []Dest
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("scalar rows first scan fails", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"n"})
dataRows.AddRow("abc")
dataRows.AddRow(4)
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d []int
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("scalar rows second scan fails", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"n"})
dataRows.AddRow(3)
dataRows.AddRow("abc")
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows).RowsWillBeClosed()
var d []int
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("scalar rows error", func(t *testing.T) {
chk := assert.New(t)
dataRows := sqlmock.NewRows([]string{"n"})
dataRows.AddRow(3)
dataRows.AddRow(4)
dataRows.RowError(0, errors.Errorf("oops"))
var d []int
err := scanner.Select(db, &d, "select * from test")
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
}
func TestScanner_ScanRows_Errors(t *testing.T) {
type Dest struct {
A int
B int
}
//
db, mock, _ := sqlmock.New()
//
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{},
}
t.Run("nil dest", func(t *testing.T) {
chk := assert.New(t)
mock.ExpectQuery("select +").
WillReturnRows(sqlmock.NewRows([]string{"a"}).AddRow(10)).
RowsWillBeClosed()
rows, err := db.Query("select * from foo")
chk.NoError(err)
err = scanner.ScanRows(rows, nil)
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("invalid dest", func(t *testing.T) {
chk := assert.New(t)
var n int
mock.ExpectQuery("select +").
WillReturnRows(sqlmock.NewRows([]string{"a"}).AddRow(10)).
RowsWillBeClosed()
rows, err := db.Query("select * from foo")
chk.NoError(err)
err = scanner.ScanRows(rows, &n)
chk.Error(err)
chk.NoError(mock.ExpectationsWereMet())
})
t.Run("readonly dest", func(t *testing.T) {
chk := assert.New(t)
var d Dest
err := scanner.Select(db, d, "select * from test")
chk.Error(err)
})
}
func TestScanner_DestWrongType(t *testing.T) {
chk := assert.New(t)
//
db, mock, err := sqlmock.New()
chk.NoError(err)
chk.NotNil(db)
chk.NotNil(mock)
//
dataRows := sqlmock.NewRows([]string{"A", "B"})
dataRows.AddRow(1, 2)
dataRows.AddRow(3, 4)
//
scanner := &sqlh.Scanner{
Mapper: &set.Mapper{
Tags: []string{"json"},
},
}
// dest is not slice
var di int
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
err = scanner.Select(db, &di, "select * from test")
chk.Error(err)
err = mock.ExpectationsWereMet()
chk.NoError(err)
// dest is not slice of struct
var dslice []int
mock.ExpectQuery("select (.+)").WillReturnRows(dataRows)
err = scanner.Select(db, &dslice, "select * from test")
chk.Error(err)
err = mock.ExpectationsWereMet()
chk.NoError(err)
}
func TestScanner_Select(t *testing.T) {
type SimpleStruct struct {
Message string
Number int
}
//
type NestedInnerStruct struct {
Id int `json:"id"`
Created time.Time `json:"created"`
Modified time.Time `json:"modified"`
}
type NestedOuterStruct struct {
NestedInnerStruct
Message string `json:"message"`
Number int `json:"value" db:"num"`
}
type PointerOuterStruct struct {
*NestedInnerStruct
Message string `json:"message"`
Number int `json:"value" db:"num"`
}
//
// Some examples return times from time generator.
tg := examples.TimeGenerator{}
times := []time.Time{tg.Next(), tg.Next(), tg.Next(), tg.Next()}
//
type SelectTest struct {
Name string
Example examples.Example
Dest reflect.Type
DestPointers reflect.Type
Expect interface{}
Scanner *sqlh.Scanner
}
tests := []SelectTest{
{
Name: "slice-struct",
Example: examples.ExSimpleMapper,
Dest: reflect.TypeOf([]SimpleStruct(nil)),
DestPointers: reflect.TypeOf([]*SimpleStruct(nil)),
Expect: []SimpleStruct{
{Message: "Hello, World!", Number: 42},
{Message: "So long!", Number: 100},
},
Scanner: &sqlh.Scanner{
Mapper: &set.Mapper{},
},
},
{
Name: "slice-struct-with-nesting",
Example: examples.ExNestedStruct,
Dest: reflect.TypeOf([]NestedOuterStruct(nil)),
DestPointers: reflect.TypeOf([]*NestedOuterStruct(nil)),
Expect: []NestedOuterStruct{
{
NestedInnerStruct: NestedInnerStruct{Id: 1, Created: times[0], Modified: times[1]},
Message: "Hello, World!",
Number: 42,
},
{
NestedInnerStruct: NestedInnerStruct{Id: 2, Created: times[2], Modified: times[3]},
Message: "So long!",
Number: 100,
},
},
Scanner: &sqlh.Scanner{
Mapper: &set.Mapper{
Elevated: set.NewTypeList(NestedInnerStruct{}),
Tags: []string{"db", "json"},
},
},
},
{
Name: "slice-struct-with-pointer-nesting",
Example: examples.ExNestedStruct,
Dest: reflect.TypeOf([]PointerOuterStruct(nil)),
DestPointers: reflect.TypeOf([]*PointerOuterStruct(nil)),
Expect: []NestedOuterStruct{
{
NestedInnerStruct: NestedInnerStruct{Id: 1, Created: times[0], Modified: times[1]},
Message: "Hello, World!",
Number: 42,
},
{
NestedInnerStruct: NestedInnerStruct{Id: 2, Created: times[2], Modified: times[3]},
Message: "So long!",
Number: 100,
},
},
Scanner: &sqlh.Scanner{
Mapper: &set.Mapper{
Elevated: set.NewTypeList(NestedInnerStruct{}),
Tags: []string{"db", "json"},
},
},
},
}
for _, test := range tests {
test := test
t.Run(test.Name, func(t *testing.T) {
t.Parallel()
chk := assert.New(t)
db, err := examples.Connect(test.Example)
chk.NoError(err)
dest := reflect.New(test.Dest).Interface()
err = test.Scanner.Select(db, dest, "select * from mytable")
chk.NoError(err)
// There's different ways we can check for equality here but we'll just see if
// what we have encodes the same as what we expect.
expect, err := json.Marshal(test.Expect)
chk.NoError(err)
actual, err := json.Marshal(dest)
chk.NoError(err)
chk.Equal(expect, actual)
})
t.Run(test.Name+"-pointers", func(t *testing.T) {
t.Parallel()
chk := assert.New(t)
db, err := examples.Connect(test.Example)
chk.NoError(err)
dest := reflect.New(test.DestPointers).Interface()
err = test.Scanner.Select(db, dest, "select * from mytable")
chk.NoError(err)
// There's different ways we can check for equality here but we'll just see if
// what we have encodes the same as what we expect.
expect, err := json.Marshal(test.Expect)
chk.NoError(err)
actual, err := json.Marshal(dest)
chk.NoError(err)
chk.Equal(expect, actual)
})
t.Run(test.Name+"-scan-rows", func(t *testing.T) {
t.Parallel()
chk := assert.New(t)
db, err := examples.Connect(test.Example)
chk.NoError(err)
dest := reflect.New(test.Dest).Interface()
rows, err := db.Query("select * from mytable")
chk.NoError(err)
defer rows.Close()
err = test.Scanner.ScanRows(rows, dest)
chk.NoError(err)
// There's different ways we can check for equality here but we'll just see if
// what we have encodes the same as what we expect.
expect, err := json.Marshal(test.Expect)
chk.NoError(err)
actual, err := json.Marshal(dest)
chk.NoError(err)
chk.Equal(expect, actual)
})
}
}