github.com/matrixorigin/matrixone@v1.2.0/pkg/vm/engine/memoryengine/id_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 memoryengine
    16  
    17  import (
    18  	"context"
    19  	"testing"
    20  	"time"
    21  )
    22  
    23  func TestIDGenerator(t *testing.T) {
    24  	ctx := context.Background()
    25  	var last ID
    26  	t0 := time.Now()
    27  	for time.Since(t0) < time.Second*2 {
    28  		for i := 0; i < 100_0000; i++ {
    29  			id, err := RandomIDGenerator.NewID(ctx)
    30  			if err != nil {
    31  				t.Fatal(err)
    32  			}
    33  			// monotonic
    34  			if id <= last {
    35  				t.Fatal()
    36  			}
    37  			last = id
    38  		}
    39  	}
    40  }