94 lines
1.9 KiB
Go
94 lines
1.9 KiB
Go
// Copyright 2019 Google Inc. 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 main
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"testing"
|
|
)
|
|
|
|
func TestSplitList(t *testing.T) {
|
|
testcases := []struct {
|
|
inputCount int
|
|
shardCount int
|
|
want [][]string
|
|
}{
|
|
{
|
|
inputCount: 1,
|
|
shardCount: 1,
|
|
want: [][]string{{"1"}},
|
|
},
|
|
{
|
|
inputCount: 1,
|
|
shardCount: 2,
|
|
want: [][]string{{"1"}, {}},
|
|
},
|
|
{
|
|
inputCount: 4,
|
|
shardCount: 2,
|
|
want: [][]string{{"1", "2"}, {"3", "4"}},
|
|
},
|
|
{
|
|
inputCount: 19,
|
|
shardCount: 10,
|
|
want: [][]string{
|
|
{"1", "2"},
|
|
{"3", "4"},
|
|
{"5", "6"},
|
|
{"7", "8"},
|
|
{"9", "10"},
|
|
{"11", "12"},
|
|
{"13", "14"},
|
|
{"15", "16"},
|
|
{"17", "18"},
|
|
{"19"},
|
|
},
|
|
},
|
|
{
|
|
inputCount: 15,
|
|
shardCount: 10,
|
|
want: [][]string{
|
|
{"1", "2"},
|
|
{"3", "4"},
|
|
{"5", "6"},
|
|
{"7", "8"},
|
|
{"9", "10"},
|
|
{"11"},
|
|
{"12"},
|
|
{"13"},
|
|
{"14"},
|
|
{"15"},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, tc := range testcases {
|
|
t.Run(fmt.Sprintf("%d/%d", tc.inputCount, tc.shardCount), func(t *testing.T) {
|
|
input := []string{}
|
|
for i := 1; i <= tc.inputCount; i++ {
|
|
input = append(input, fmt.Sprintf("%d", i))
|
|
}
|
|
|
|
got := splitList(input, tc.shardCount)
|
|
|
|
if !reflect.DeepEqual(got, tc.want) {
|
|
t.Errorf("unexpected result for splitList([]string{...%d...}, %d):\nwant: %v\n got: %v\n",
|
|
tc.inputCount, tc.shardCount, tc.want, got)
|
|
}
|
|
})
|
|
}
|
|
}
|