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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2021 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package testutil
import (
"encoding/json"
"fmt"
"gopkg.in/check.v1"
)
type jsonEqualChecker struct {
*check.CheckerInfo
}
// JsonEquals compares the obtained and expected values after having serialized
// them to JSON and deserialized to a generic any type. This avoids trouble
// comparing types with unexported fields that otherwise would be problematic to
// set in external packages.
var JsonEquals check.Checker = &jsonEqualChecker{
&check.CheckerInfo{Name: "JsonEqual", Params: []string{"obtained", "expected"}},
}
func (c *jsonEqualChecker) Check(params []any, names []string) (result bool, error string) {
toComparableMap := func(what any) any {
b, err := json.Marshal(what)
if err != nil {
panic("cannot marshal")
}
var back any
if err := json.Unmarshal(b, &back); err != nil {
panic(fmt.Sprintf("cannot unmarshal from: %s", string(b)))
}
return back
}
obtained := toComparableMap(params[0])
ref := toComparableMap(params[1])
return check.DeepEquals.Check([]any{obtained, ref}, names)
}
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