mirror of
https://github.com/IBM/fp-go.git
synced 2025-07-15 01:24:23 +02:00
44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
// Copyright (c) 2023 IBM Corp.
|
|
// All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package testing
|
|
|
|
import (
|
|
"testing"
|
|
|
|
AR "github.com/IBM/fp-go/internal/array"
|
|
M "github.com/IBM/fp-go/monoid"
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
func assertLaws[A any](t *testing.T, m M.Monoid[A]) func(a A) bool {
|
|
e := m.Empty()
|
|
return func(a A) bool {
|
|
return assert.Equal(t, a, m.Concat(a, e), "Monoid right identity") &&
|
|
assert.Equal(t, a, m.Concat(e, a), "Monoid left identity")
|
|
}
|
|
}
|
|
|
|
// AssertLaws asserts the monoid laws for a dataset
|
|
func AssertLaws[A any](t *testing.T, m M.Monoid[A]) func(data []A) bool {
|
|
law := assertLaws(t, m)
|
|
|
|
return func(data []A) bool {
|
|
return AR.Reduce(data, func(result bool, value A) bool {
|
|
return result && law(value)
|
|
}, true)
|
|
}
|
|
}
|