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42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package record
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import (
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"testing"
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F "github.com/IBM/fp-go/function"
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L "github.com/IBM/fp-go/optics/lens"
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O "github.com/IBM/fp-go/option"
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"github.com/stretchr/testify/assert"
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)
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type (
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S = map[string]int
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)
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func TestAtKey(t *testing.T) {
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sa := F.Pipe1(
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L.Id[S](),
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AtKey[S, int]("a"),
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)
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assert.Equal(t, O.Some(1), sa.Get(S{"a": 1}))
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assert.Equal(t, S{"a": 2, "b": 2}, sa.Set(O.Some(2))(S{"a": 1, "b": 2}))
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assert.Equal(t, S{"a": 1, "b": 2}, sa.Set(O.Some(1))(S{"b": 2}))
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assert.Equal(t, S{"b": 2}, sa.Set(O.None[int]())(S{"a": 1, "b": 2}))
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}
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