vitess.io/vitess@v0.16.2/go/sync2/consolidator_test.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package sync2
    18  
    19  import (
    20  	"reflect"
    21  	"testing"
    22  )
    23  
    24  func TestConsolidator(t *testing.T) {
    25  	con := NewConsolidator()
    26  	sql := "select * from SomeTable"
    27  
    28  	want := []ConsolidatorCacheItem{}
    29  	if !reflect.DeepEqual(con.Items(), want) {
    30  		t.Fatalf("expected consolidator to have no items")
    31  	}
    32  
    33  	orig, added := con.Create(sql)
    34  	if !added {
    35  		t.Fatalf("expected consolidator to register a new entry")
    36  	}
    37  
    38  	if !reflect.DeepEqual(con.Items(), want) {
    39  		t.Fatalf("expected consolidator to still have no items")
    40  	}
    41  
    42  	dup, added := con.Create(sql)
    43  	if added {
    44  		t.Fatalf("did not expect consolidator to register a new entry")
    45  	}
    46  
    47  	result := 1
    48  	go func() {
    49  		orig.Result = &result
    50  		orig.Broadcast()
    51  	}()
    52  	dup.Wait()
    53  
    54  	if *orig.Result.(*int) != result {
    55  		t.Errorf("failed to pass result")
    56  	}
    57  	if *orig.Result.(*int) != *dup.Result.(*int) {
    58  		t.Fatalf("failed to share the result")
    59  	}
    60  
    61  	want = []ConsolidatorCacheItem{{Query: sql, Count: 1}}
    62  	if !reflect.DeepEqual(con.Items(), want) {
    63  		t.Fatalf("expected consolidator to have one items %v", con.Items())
    64  	}
    65  
    66  	// Running the query again should add a new entry since the original
    67  	// query execution completed
    68  	second, added := con.Create(sql)
    69  	if !added {
    70  		t.Fatalf("expected consolidator to register a new entry")
    71  	}
    72  
    73  	go func() {
    74  		second.Result = &result
    75  		second.Broadcast()
    76  	}()
    77  	dup.Wait()
    78  
    79  	want = []ConsolidatorCacheItem{{Query: sql, Count: 2}}
    80  	if !reflect.DeepEqual(con.Items(), want) {
    81  		t.Fatalf("expected consolidator to have two items %v", con.Items())
    82  	}
    83  
    84  }