github.com/matrixorigin/matrixone@v1.2.0/pkg/txn/client/generator_test.go (about)

     1  // Copyright 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package client
    16  
    17  import (
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/assert"
    21  )
    22  
    23  func TestGenerateUUID(t *testing.T) {
    24  	gen := newUUIDTxnIDGenerator()
    25  	assert.NotEmpty(t, gen.Generate())
    26  
    27  	n := 100000
    28  	ids := make(map[string]struct{}, n)
    29  	for i := 0; i < n; i++ {
    30  		id := string(gen.Generate())
    31  		if _, ok := ids[id]; ok {
    32  			assert.Fail(t, "repeat uuid")
    33  		}
    34  		ids[id] = struct{}{}
    35  	}
    36  }