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package mapiter_test
import (
"context"
"fmt"
"reflect"
"testing"
"time"
"github.com/lestrrat-go/iter/mapiter"
"github.com/stretchr/testify/assert"
)
func TestIterator(t *testing.T) {
chSize := 2
ch := make(chan *mapiter.Pair, chSize)
ch <- &mapiter.Pair{Key: "one", Value: 1}
ch <- &mapiter.Pair{Key: "two", Value: 2}
close(ch)
i := mapiter.New(ch)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
var loopCount int
for i.Next(ctx) {
loopCount++
p := i.Pair()
if !assert.Equal(t, p.Value, loopCount, "expected values to match") {
return
}
}
if !assert.Equal(t, chSize, loopCount, "expected to loop for %d times", chSize) {
return
}
}
type MapLike struct {
Values map[string]int
}
func (m *MapLike) Iterate(ctx context.Context) mapiter.Iterator {
ch := make(chan *mapiter.Pair)
go m.iterate(ctx, ch)
return mapiter.New(ch)
}
func (m *MapLike) iterate(ctx context.Context, ch chan *mapiter.Pair) {
defer close(ch)
for k, v := range m.Values {
ch <- &mapiter.Pair{Key: k, Value: v}
}
}
func TestAsMap(t *testing.T) {
t.Run("maps", func(t *testing.T) {
inputs := []interface{}{
map[string]string{
"foo": "one",
"bar": "two",
"baz": "three",
},
}
for _, x := range inputs {
input := x
t.Run(fmt.Sprintf("%T", input), func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
dst := reflect.New(reflect.TypeOf(input))
dst.Elem().Set(reflect.MakeMap(reflect.TypeOf(input)))
if !assert.NoError(t, mapiter.AsMap(ctx, input, dst.Interface()), `mapiter.AsMap should succeed`) {
return
}
if !assert.Equal(t, input, dst.Elem().Interface(), `maps should be the same`) {
return
}
})
}
})
t.Run("Map-like object", func(t *testing.T) {
src := &MapLike{
Values: map[string]int{
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5,
},
}
t.Run("dst is nil", func(t *testing.T) {
var m map[string]int
if !assert.NoError(t, mapiter.AsMap(context.Background(), src, &m), `AsMap against nil map should succeed`) {
return
}
if !assert.Equal(t, src.Values, m, "maps should match") {
return
}
})
t.Run("dst is nil (elem type does not match)", func(t *testing.T) {
var m map[string]string
if assert.Error(t, mapiter.AsMap(context.Background(), src, &m), `AsMap against nil map should fail`) {
return
}
})
t.Run("dst is not nil", func(t *testing.T) {
m := make(map[string]int)
if !assert.NoError(t, mapiter.AsMap(context.Background(), src, &m), `AsMap against nil map should succeed`) {
return
}
if !assert.Equal(t, src.Values, m, "maps should match") {
return
}
})
})
}
func TestGH1(t *testing.T) {
t.Run("maps", func(t *testing.T) {
inputs := []interface{}{
map[string]interface{}{
"foo": "one",
"bar": "two",
"baz": nil,
},
}
for _, x := range inputs {
input := x
t.Run(fmt.Sprintf("%T", input), func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
dst := reflect.New(reflect.TypeOf(input))
dst.Elem().Set(reflect.MakeMap(reflect.TypeOf(input)))
if !assert.NoError(t, mapiter.AsMap(ctx, input, dst.Interface()), `mapiter.AsMap should succeed`) {
return
}
if !assert.Equal(t, input, dst.Elem().Interface(), `maps should be the same`) {
return
}
})
}
})
}
|
