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issue138_test.go
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issue138_test.go
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package mergo_test
import (
"encoding/json"
"testing"
"dario.cat/mergo"
)
const issue138configuration string = `
{
"Port": 80
}
`
func TestIssue138(t *testing.T) {
type config struct {
Port uint16
}
type compatibleConfig struct {
Port float64
}
foo := make(map[string]interface{})
// encoding/json unmarshals numbers as float64
// https://golang.org/pkg/encoding/json/#Unmarshal
json.Unmarshal([]byte(issue138configuration), &foo)
err := mergo.Map(&config{}, foo)
if err == nil {
t.Error("expected type mismatch error, got nil")
} else {
if err.Error() != "type mismatch on Port field: found float64, expected uint16" {
t.Errorf("expected type mismatch error, got %q", err)
}
}
c := compatibleConfig{}
if err := mergo.Map(&c, foo); err != nil {
t.Error(err)
}
}