sqlboiler/types/array_test.go

// Copyright (c) 2011-2013, 'pq' Contributors Portions Copyright (C) 2011 Blake Mizerany. MIT license.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package types

import (
	"database/sql"
	"database/sql/driver"
	"math/rand"
	"reflect"
	"strings"
	"testing"
)

func TestParseArray(t *testing.T) {
	for _, tt := range []struct {
		input string
		delim string
		dims  []int
		elems [][]byte
	}{
		{`{}`, `,`, nil, [][]byte{}},
		{`{NULL}`, `,`, []int{1}, [][]byte{nil}},
		{`{a}`, `,`, []int{1}, [][]byte{{'a'}}},
		{`{a,b}`, `,`, []int{2}, [][]byte{{'a'}, {'b'}}},
		{`{{a,b}}`, `,`, []int{1, 2}, [][]byte{{'a'}, {'b'}}},
		{`{{a},{b}}`, `,`, []int{2, 1}, [][]byte{{'a'}, {'b'}}},
		{`{{{a,b},{c,d},{e,f}}}`, `,`, []int{1, 3, 2}, [][]byte{
			{'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
		}},
		{`{""}`, `,`, []int{1}, [][]byte{{}}},
		{`{","}`, `,`, []int{1}, [][]byte{{','}}},
		{`{",",","}`, `,`, []int{2}, [][]byte{{','}, {','}}},
		{`{{",",","}}`, `,`, []int{1, 2}, [][]byte{{','}, {','}}},
		{`{{","},{","}}`, `,`, []int{2, 1}, [][]byte{{','}, {','}}},
		{`{{{",",","},{",",","},{",",","}}}`, `,`, []int{1, 3, 2}, [][]byte{
			{','}, {','}, {','}, {','}, {','}, {','},
		}},
		{`{"\"}"}`, `,`, []int{1}, [][]byte{{'"', '}'}}},
		{`{"\"","\""}`, `,`, []int{2}, [][]byte{{'"'}, {'"'}}},
		{`{{"\"","\""}}`, `,`, []int{1, 2}, [][]byte{{'"'}, {'"'}}},
		{`{{"\""},{"\""}}`, `,`, []int{2, 1}, [][]byte{{'"'}, {'"'}}},
		{`{{{"\"","\""},{"\"","\""},{"\"","\""}}}`, `,`, []int{1, 3, 2}, [][]byte{
			{'"'}, {'"'}, {'"'}, {'"'}, {'"'}, {'"'},
		}},
		{`{axyzb}`, `xyz`, []int{2}, [][]byte{{'a'}, {'b'}}},
	} {
		dims, elems, err := parseArray([]byte(tt.input), []byte(tt.delim))

		if err != nil {
			t.Fatalf("Expected no error for %q, got %q", tt.input, err)
		}
		if !reflect.DeepEqual(dims, tt.dims) {
			t.Errorf("Expected %v dimensions for %q, got %v", tt.dims, tt.input, dims)
		}
		if !reflect.DeepEqual(elems, tt.elems) {
			t.Errorf("Expected %v elements for %q, got %v", tt.elems, tt.input, elems)
		}
	}
}

func TestParseArrayError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "expected '{' at offset 0"},
		{`x`, "expected '{' at offset 0"},
		{`}`, "expected '{' at offset 0"},
		{`{`, "expected '}' at offset 1"},
		{`{{}`, "expected '}' at offset 3"},
		{`{}}`, "unexpected '}' at offset 2"},
		{`{,}`, "unexpected ',' at offset 1"},
		{`{,x}`, "unexpected ',' at offset 1"},
		{`{x,}`, "unexpected '}' at offset 3"},
		{`{""x}`, "unexpected 'x' at offset 3"},
		{`{{a},{b,c}}`, "multidimensional arrays must have elements with matching dimensions"},
	} {
		_, _, err := parseArray([]byte(tt.input), []byte{','})

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
	}
}

func TestArrayScanner(t *testing.T) {
	var s sql.Scanner

	s = Array(&[]bool{})
	if _, ok := s.(*BoolArray); !ok {
		t.Errorf("Expected *BoolArray, got %T", s)
	}

	s = Array(&[]float64{})
	if _, ok := s.(*Float64Array); !ok {
		t.Errorf("Expected *Float64Array, got %T", s)
	}

	s = Array(&[]int64{})
	if _, ok := s.(*Int64Array); !ok {
		t.Errorf("Expected *Int64Array, got %T", s)
	}

	s = Array(&[]string{})
	if _, ok := s.(*StringArray); !ok {
		t.Errorf("Expected *StringArray, got %T", s)
	}
}

func TestArrayValuer(t *testing.T) {
	var v driver.Valuer

	v = Array([]bool{})
	if _, ok := v.(*BoolArray); !ok {
		t.Errorf("Expected *BoolArray, got %T", v)
	}

	v = Array([]float64{})
	if _, ok := v.(*Float64Array); !ok {
		t.Errorf("Expected *Float64Array, got %T", v)
	}

	v = Array([]int64{})
	if _, ok := v.(*Int64Array); !ok {
		t.Errorf("Expected *Int64Array, got %T", v)
	}

	v = Array([]string{})
	if _, ok := v.(*StringArray); !ok {
		t.Errorf("Expected *StringArray, got %T", v)
	}
}

func TestBoolArrayScanUnsupported(t *testing.T) {
	var arr BoolArray
	err := arr.Scan(1)

	if err == nil {
		t.Fatal("Expected error when scanning from int")
	}
	if !strings.Contains(err.Error(), "int to BoolArray") {
		t.Errorf("Expected type to be mentioned when scanning, got %q", err)
	}
}

var BoolArrayStringTests = []struct {
	str string
	arr BoolArray
}{
	{`{}`, BoolArray{}},
	{`{t}`, BoolArray{true}},
	{`{f,t}`, BoolArray{false, true}},
}

func TestBoolArrayScanBytes(t *testing.T) {
	for _, tt := range BoolArrayStringTests {
		bytes := []byte(tt.str)
		arr := BoolArray{true, true, true}
		err := arr.Scan(bytes)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", bytes, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, bytes, arr)
		}
	}
}

func BenchmarkBoolArrayScanBytes(b *testing.B) {
	var a BoolArray
	var x interface{} = []byte(`{t,f,t,f,t,f,t,f,t,f}`)

	for i := 0; i < b.N; i++ {
		a = BoolArray{}
		a.Scan(x)
	}
}

func TestBoolArrayScanString(t *testing.T) {
	for _, tt := range BoolArrayStringTests {
		arr := BoolArray{true, true, true}
		err := arr.Scan(tt.str)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", tt.str, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, tt.str, arr)
		}
	}
}

func TestBoolArrayScanError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "unable to parse array"},
		{`{`, "unable to parse array"},
		{`{{t},{f}}`, "cannot convert ARRAY[2][1] to BoolArray"},
		{`{NULL}`, `could not parse boolean array index 0: invalid boolean ""`},
		{`{a}`, `could not parse boolean array index 0: invalid boolean "a"`},
		{`{t,b}`, `could not parse boolean array index 1: invalid boolean "b"`},
		{`{t,f,cd}`, `could not parse boolean array index 2: invalid boolean "cd"`},
	} {
		arr := BoolArray{true, true, true}
		err := arr.Scan(tt.input)

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
		if !reflect.DeepEqual(arr, BoolArray{true, true, true}) {
			t.Errorf("Expected destination not to change for %q, got %+v", tt.input, arr)
		}
	}
}

func TestBoolArrayValue(t *testing.T) {
	result, err := BoolArray(nil).Value()

	if err != nil {
		t.Fatalf("Expected no error for nil, got %v", err)
	}
	if result != nil {
		t.Errorf("Expected nil, got %q", result)
	}

	result, err = BoolArray([]bool{}).Value()

	if err != nil {
		t.Fatalf("Expected no error for empty, got %v", err)
	}
	if expected := `{}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected empty, got %q", result)
	}

	result, err = BoolArray([]bool{false, true, false}).Value()

	if err != nil {
		t.Fatalf("Expected no error, got %v", err)
	}
	if expected := `{f,t,f}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected %q, got %q", expected, result)
	}
}

func BenchmarkBoolArrayValue(b *testing.B) {
	rand.Seed(1)
	x := make([]bool, 10)
	for i := 0; i < len(x); i++ {
		x[i] = rand.Intn(2) == 0
	}
	a := BoolArray(x)

	for i := 0; i < b.N; i++ {
		a.Value()
	}
}

func TestBytesArrayScanUnsupported(t *testing.T) {
	var arr BytesArray
	err := arr.Scan(1)

	if err == nil {
		t.Fatal("Expected error when scanning from int")
	}
	if !strings.Contains(err.Error(), "int to BytesArray") {
		t.Errorf("Expected type to be mentioned when scanning, got %q", err)
	}
}

var BytesArrayStringTests = []struct {
	str string
	arr BytesArray
}{
	{`{}`, BytesArray{}},
	{`{NULL}`, BytesArray{nil}},
	{`{"\\xfeff"}`, BytesArray{{'\xFE', '\xFF'}}},
	{`{"\\xdead","\\xbeef"}`, BytesArray{{'\xDE', '\xAD'}, {'\xBE', '\xEF'}}},
}

func TestBytesArrayScanBytes(t *testing.T) {
	for _, tt := range BytesArrayStringTests {
		bytes := []byte(tt.str)
		arr := BytesArray{{2}, {6}, {0, 0}}
		err := arr.Scan(bytes)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", bytes, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, bytes, arr)
		}
	}
}

func BenchmarkBytesArrayScanBytes(b *testing.B) {
	var a BytesArray
	var x interface{} = []byte(`{"\\xfe","\\xff","\\xdead","\\xbeef","\\xfe","\\xff","\\xdead","\\xbeef","\\xfe","\\xff"}`)

	for i := 0; i < b.N; i++ {
		a = BytesArray{}
		a.Scan(x)
	}
}

func TestBytesArrayScanString(t *testing.T) {
	for _, tt := range BytesArrayStringTests {
		arr := BytesArray{{2}, {6}, {0, 0}}
		err := arr.Scan(tt.str)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", tt.str, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, tt.str, arr)
		}
	}
}

func TestBytesArrayScanError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "unable to parse array"},
		{`{`, "unable to parse array"},
		{`{{"\\xfeff"},{"\\xbeef"}}`, "cannot convert ARRAY[2][1] to BytesArray"},
		{`{"\\abc"}`, "could not parse bytea array index 0: could not parse bytea value"},
	} {
		arr := BytesArray{{2}, {6}, {0, 0}}
		err := arr.Scan(tt.input)

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
		if !reflect.DeepEqual(arr, BytesArray{{2}, {6}, {0, 0}}) {
			t.Errorf("Expected destination not to change for %q, got %+v", tt.input, arr)
		}
	}
}

func TestBytesArrayValue(t *testing.T) {
	result, err := BytesArray(nil).Value()

	if err != nil {
		t.Fatalf("Expected no error for nil, got %v", err)
	}
	if result != nil {
		t.Errorf("Expected nil, got %q", result)
	}

	result, err = BytesArray([][]byte{}).Value()

	if err != nil {
		t.Fatalf("Expected no error for empty, got %v", err)
	}
	if expected := `{}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected empty, got %q", result)
	}

	result, err = BytesArray([][]byte{{'\xDE', '\xAD', '\xBE', '\xEF'}, {'\xFE', '\xFF'}, {}}).Value()

	if err != nil {
		t.Fatalf("Expected no error, got %v", err)
	}
	if expected := `{"\\xdeadbeef","\\xfeff","\\x"}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected %q, got %q", expected, result)
	}
}

func BenchmarkBytesArrayValue(b *testing.B) {
	rand.Seed(1)
	x := make([][]byte, 10)
	for i := 0; i < len(x); i++ {
		x[i] = make([]byte, len(x))
		for j := 0; j < len(x); j++ {
			x[i][j] = byte(rand.Int())
		}
	}
	a := BytesArray(x)

	for i := 0; i < b.N; i++ {
		a.Value()
	}
}

func TestFloat64ArrayScanUnsupported(t *testing.T) {
	var arr Float64Array
	err := arr.Scan(true)

	if err == nil {
		t.Fatal("Expected error when scanning from bool")
	}
	if !strings.Contains(err.Error(), "bool to Float64Array") {
		t.Errorf("Expected type to be mentioned when scanning, got %q", err)
	}
}

var Float64ArrayStringTests = []struct {
	str string
	arr Float64Array
}{
	{`{}`, Float64Array{}},
	{`{1.2}`, Float64Array{1.2}},
	{`{3.456,7.89}`, Float64Array{3.456, 7.89}},
	{`{3,1,2}`, Float64Array{3, 1, 2}},
}

func TestFloat64ArrayScanBytes(t *testing.T) {
	for _, tt := range Float64ArrayStringTests {
		bytes := []byte(tt.str)
		arr := Float64Array{5, 5, 5}
		err := arr.Scan(bytes)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", bytes, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, bytes, arr)
		}
	}
}

func BenchmarkFloat64ArrayScanBytes(b *testing.B) {
	var a Float64Array
	var x interface{} = []byte(`{1.2,3.4,5.6,7.8,9.01,2.34,5.67,8.90,1.234,5.678}`)

	for i := 0; i < b.N; i++ {
		a = Float64Array{}
		a.Scan(x)
	}
}

func TestFloat64ArrayScanString(t *testing.T) {
	for _, tt := range Float64ArrayStringTests {
		arr := Float64Array{5, 5, 5}
		err := arr.Scan(tt.str)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", tt.str, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, tt.str, arr)
		}
	}
}

func TestFloat64ArrayScanError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "unable to parse array"},
		{`{`, "unable to parse array"},
		{`{{5.6},{7.8}}`, "cannot convert ARRAY[2][1] to Float64Array"},
		{`{NULL}`, "parsing array element index 0:"},
		{`{a}`, "parsing array element index 0:"},
		{`{5.6,a}`, "parsing array element index 1:"},
		{`{5.6,7.8,a}`, "parsing array element index 2:"},
	} {
		arr := Float64Array{5, 5, 5}
		err := arr.Scan(tt.input)

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
		if !reflect.DeepEqual(arr, Float64Array{5, 5, 5}) {
			t.Errorf("Expected destination not to change for %q, got %+v", tt.input, arr)
		}
	}
}

func TestFloat64ArrayValue(t *testing.T) {
	result, err := Float64Array(nil).Value()

	if err != nil {
		t.Fatalf("Expected no error for nil, got %v", err)
	}
	if result != nil {
		t.Errorf("Expected nil, got %q", result)
	}

	result, err = Float64Array([]float64{}).Value()

	if err != nil {
		t.Fatalf("Expected no error for empty, got %v", err)
	}
	if expected := `{}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected empty, got %q", result)
	}

	result, err = Float64Array([]float64{1.2, 3.4, 5.6}).Value()

	if err != nil {
		t.Fatalf("Expected no error, got %v", err)
	}
	if expected := `{1.2,3.4,5.6}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected %q, got %q", expected, result)
	}
}

func BenchmarkFloat64ArrayValue(b *testing.B) {
	rand.Seed(1)
	x := make([]float64, 10)
	for i := 0; i < len(x); i++ {
		x[i] = rand.NormFloat64()
	}
	a := Float64Array(x)

	for i := 0; i < b.N; i++ {
		a.Value()
	}
}

func TestInt64ArrayScanUnsupported(t *testing.T) {
	var arr Int64Array
	err := arr.Scan(true)

	if err == nil {
		t.Fatal("Expected error when scanning from bool")
	}
	if !strings.Contains(err.Error(), "bool to Int64Array") {
		t.Errorf("Expected type to be mentioned when scanning, got %q", err)
	}
}

var Int64ArrayStringTests = []struct {
	str string
	arr Int64Array
}{
	{`{}`, Int64Array{}},
	{`{12}`, Int64Array{12}},
	{`{345,678}`, Int64Array{345, 678}},
}

func TestInt64ArrayScanBytes(t *testing.T) {
	for _, tt := range Int64ArrayStringTests {
		bytes := []byte(tt.str)
		arr := Int64Array{5, 5, 5}
		err := arr.Scan(bytes)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", bytes, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, bytes, arr)
		}
	}
}

func BenchmarkInt64ArrayScanBytes(b *testing.B) {
	var a Int64Array
	var x interface{} = []byte(`{1,2,3,4,5,6,7,8,9,0}`)

	for i := 0; i < b.N; i++ {
		a = Int64Array{}
		a.Scan(x)
	}
}

func TestInt64ArrayScanString(t *testing.T) {
	for _, tt := range Int64ArrayStringTests {
		arr := Int64Array{5, 5, 5}
		err := arr.Scan(tt.str)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", tt.str, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, tt.str, arr)
		}
	}
}

func TestInt64ArrayScanError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "unable to parse array"},
		{`{`, "unable to parse array"},
		{`{{5},{6}}`, "cannot convert ARRAY[2][1] to Int64Array"},
		{`{NULL}`, "parsing array element index 0:"},
		{`{a}`, "parsing array element index 0:"},
		{`{5,a}`, "parsing array element index 1:"},
		{`{5,6,a}`, "parsing array element index 2:"},
	} {
		arr := Int64Array{5, 5, 5}
		err := arr.Scan(tt.input)

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
		if !reflect.DeepEqual(arr, Int64Array{5, 5, 5}) {
			t.Errorf("Expected destination not to change for %q, got %+v", tt.input, arr)
		}
	}
}

func TestInt64ArrayValue(t *testing.T) {
	result, err := Int64Array(nil).Value()

	if err != nil {
		t.Fatalf("Expected no error for nil, got %v", err)
	}
	if result != nil {
		t.Errorf("Expected nil, got %q", result)
	}

	result, err = Int64Array([]int64{}).Value()

	if err != nil {
		t.Fatalf("Expected no error for empty, got %v", err)
	}
	if expected := `{}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected empty, got %q", result)
	}

	result, err = Int64Array([]int64{1, 2, 3}).Value()

	if err != nil {
		t.Fatalf("Expected no error, got %v", err)
	}
	if expected := `{1,2,3}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected %q, got %q", expected, result)
	}
}

func BenchmarkInt64ArrayValue(b *testing.B) {
	rand.Seed(1)
	x := make([]int64, 10)
	for i := 0; i < len(x); i++ {
		x[i] = rand.Int63()
	}
	a := Int64Array(x)

	for i := 0; i < b.N; i++ {
		a.Value()
	}
}

func TestStringArrayScanUnsupported(t *testing.T) {
	var arr StringArray
	err := arr.Scan(true)

	if err == nil {
		t.Fatal("Expected error when scanning from bool")
	}
	if !strings.Contains(err.Error(), "bool to StringArray") {
		t.Errorf("Expected type to be mentioned when scanning, got %q", err)
	}
}

var StringArrayStringTests = []struct {
	str string
	arr StringArray
}{
	{`{}`, StringArray{}},
	{`{t}`, StringArray{"t"}},
	{`{f,1}`, StringArray{"f", "1"}},
	{`{"a\\b","c d",","}`, StringArray{"a\\b", "c d", ","}},
}

func TestStringArrayScanBytes(t *testing.T) {
	for _, tt := range StringArrayStringTests {
		bytes := []byte(tt.str)
		arr := StringArray{"x", "x", "x"}
		err := arr.Scan(bytes)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", bytes, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, bytes, arr)
		}
	}
}

func BenchmarkStringArrayScanBytes(b *testing.B) {
	var a StringArray
	var x interface{} = []byte(`{a,b,c,d,e,f,g,h,i,j}`)
	var y interface{} = []byte(`{"\a","\b","\c","\d","\e","\f","\g","\h","\i","\j"}`)

	for i := 0; i < b.N; i++ {
		a = StringArray{}
		a.Scan(x)
		a = StringArray{}
		a.Scan(y)
	}
}

func TestStringArrayScanString(t *testing.T) {
	for _, tt := range StringArrayStringTests {
		arr := StringArray{"x", "x", "x"}
		err := arr.Scan(tt.str)

		if err != nil {
			t.Fatalf("Expected no error for %q, got %v", tt.str, err)
		}
		if !reflect.DeepEqual(arr, tt.arr) {
			t.Errorf("Expected %+v for %q, got %+v", tt.arr, tt.str, arr)
		}
	}
}

func TestStringArrayScanError(t *testing.T) {
	for _, tt := range []struct {
		input, err string
	}{
		{``, "unable to parse array"},
		{`{`, "unable to parse array"},
		{`{{a},{b}}`, "cannot convert ARRAY[2][1] to StringArray"},
		{`{NULL}`, "parsing array element index 0: cannot convert nil to string"},
		{`{a,NULL}`, "parsing array element index 1: cannot convert nil to string"},
		{`{a,b,NULL}`, "parsing array element index 2: cannot convert nil to string"},
	} {
		arr := StringArray{"x", "x", "x"}
		err := arr.Scan(tt.input)

		if err == nil {
			t.Fatalf("Expected error for %q, got none", tt.input)
		}
		if !strings.Contains(err.Error(), tt.err) {
			t.Errorf("Expected error to contain %q for %q, got %q", tt.err, tt.input, err)
		}
		if !reflect.DeepEqual(arr, StringArray{"x", "x", "x"}) {
			t.Errorf("Expected destination not to change for %q, got %+v", tt.input, arr)
		}
	}
}

func TestStringArrayValue(t *testing.T) {
	result, err := StringArray(nil).Value()

	if err != nil {
		t.Fatalf("Expected no error for nil, got %v", err)
	}
	if result != nil {
		t.Errorf("Expected nil, got %q", result)
	}

	result, err = StringArray([]string{}).Value()

	if err != nil {
		t.Fatalf("Expected no error for empty, got %v", err)
	}
	if expected := `{}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected empty, got %q", result)
	}

	result, err = StringArray([]string{`a`, `\b`, `c"`, `d,e`}).Value()

	if err != nil {
		t.Fatalf("Expected no error, got %v", err)
	}
	if expected := `{"a","\\b","c\"","d,e"}`; !reflect.DeepEqual(result, expected) {
		t.Errorf("Expected %q, got %q", expected, result)
	}
}

func BenchmarkStringArrayValue(b *testing.B) {
	x := make([]string, 10)
	for i := 0; i < len(x); i++ {
		x[i] = strings.Repeat(`abc"def\ghi`, 5)
	}
	a := StringArray(x)

	for i := 0; i < b.N; i++ {
		a.Value()
	}
}