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package bson
import (
"testing"
"github.com/stretchr/testify/assert"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
)
type inputArgs struct {
Name string
Val *float64
}
type outputArgs struct {
Name string
Val *int64
}
func TestTruncation(t *testing.T) {
t.Run("truncation", func(t *testing.T) {
inputName := "truncation"
inputVal := 4.7892
input := inputArgs{Name: inputName, Val: &inputVal}
ec := bsoncodec.EncodeContext{Registry: DefaultRegistry}
doc, err := MarshalWithContext(ec, &input)
assert.Nil(t, err)
var output outputArgs
dc := bsoncodec.DecodeContext{
Registry: DefaultRegistry,
Truncate: true,
}
err = UnmarshalWithContext(dc, doc, &output)
assert.Nil(t, err)
assert.Equal(t, inputName, output.Name)
assert.Equal(t, int64(inputVal), *output.Val)
})
t.Run("no truncation", func(t *testing.T) {
inputName := "no truncation"
inputVal := 7.382
input := inputArgs{Name: inputName, Val: &inputVal}
ec := bsoncodec.EncodeContext{Registry: DefaultRegistry}
doc, err := MarshalWithContext(ec, &input)
assert.Nil(t, err)
var output outputArgs
dc := bsoncodec.DecodeContext{
Registry: DefaultRegistry,
Truncate: false,
}
// case throws an error when truncation is disabled
err = UnmarshalWithContext(dc, doc, &output)
assert.NotNil(t, err)
})
}
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