go.temporal.io/server@v1.23.0/common/collection/indexedtakelist_test.go (about)

     1  // The MIT License
     2  //
     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
     4  //
     5  // Copyright (c) 2020 Uber Technologies, Inc.
     6  //
     7  // Permission is hereby granted, free of charge, to any person obtaining a copy
     8  // of this software and associated documentation files (the "Software"), to deal
     9  // in the Software without restriction, including without limitation the rights
    10  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    11  // copies of the Software, and to permit persons to whom the Software is
    12  // furnished to do so, subject to the following conditions:
    13  //
    14  // The above copyright notice and this permission notice shall be included in
    15  // all copies or substantial portions of the Software.
    16  //
    17  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    19  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    20  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    21  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    22  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    23  // THE SOFTWARE.
    24  
    25  package collection_test
    26  
    27  import (
    28  	"testing"
    29  
    30  	"github.com/stretchr/testify/require"
    31  	"go.temporal.io/server/common/collection"
    32  )
    33  
    34  func TestIndexedTakeList(t *testing.T) {
    35  	t.Parallel()
    36  
    37  	type Value struct{ ID int }
    38  	values := []Value{{ID: 0}, {ID: 1}, {ID: 2}, {ID: 3}, {ID: 4}}
    39  	indexer := func(v Value) int { return v.ID }
    40  
    41  	list := collection.NewIndexedTakeList(values, indexer)
    42  
    43  	t.Run("take absent", func(t *testing.T) {
    44  		_, ok := list.Take(999)
    45  		require.False(t, ok)
    46  	})
    47  
    48  	t.Run("take present", func(t *testing.T) {
    49  		v, ok := list.Take(3)
    50  		require.True(t, ok)
    51  		require.Equal(t, 3, v.ID)
    52  	})
    53  
    54  	t.Run("take taken", func(t *testing.T) {
    55  		_, ok := list.Take(3)
    56  		require.False(t, ok)
    57  	})
    58  
    59  	t.Run("take remaining", func(t *testing.T) {
    60  		allowed := []int{0, 1, 2, 4}
    61  		remaining := list.TakeRemaining()
    62  		require.Len(t, remaining, len(allowed))
    63  		for _, v := range remaining {
    64  			require.Contains(t, allowed, v.ID)
    65  		}
    66  	})
    67  
    68  	t.Run("now empty", func(t *testing.T) {
    69  		require.Empty(t, list.TakeRemaining())
    70  	})
    71  }