github.com/pingcap/badger@v1.5.1-0.20230103063557-828f39b09b6d/cache/z/z_test.go (about)

     1  /*
     2   * Copyright 2019 Dgraph Labs, Inc. and Contributors
     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 z
    18  
    19  import (
    20  	"math"
    21  	"testing"
    22  )
    23  
    24  func verifyHashProduct(t *testing.T, wantKey, wantConflict, key, conflict uint64) {
    25  	if wantKey != key || wantConflict != conflict {
    26  		t.Errorf("expected (%d, %d) but got (%d, %d)\n",
    27  			wantKey, wantConflict, key, conflict)
    28  	}
    29  }
    30  
    31  func TestKeyToHash(t *testing.T) {
    32  	var key uint64
    33  	var conflict uint64
    34  
    35  	key, conflict = KeyToHash(uint64(1))
    36  	verifyHashProduct(t, 1, 0, key, conflict)
    37  
    38  	key, conflict = KeyToHash(1)
    39  	verifyHashProduct(t, 1, 0, key, conflict)
    40  
    41  	key, conflict = KeyToHash(int32(2))
    42  	verifyHashProduct(t, 2, 0, key, conflict)
    43  
    44  	key, conflict = KeyToHash(int32(-2))
    45  	verifyHashProduct(t, math.MaxUint64-1, 0, key, conflict)
    46  
    47  	key, conflict = KeyToHash(int64(-2))
    48  	verifyHashProduct(t, math.MaxUint64-1, 0, key, conflict)
    49  
    50  	key, conflict = KeyToHash(uint32(3))
    51  	verifyHashProduct(t, 3, 0, key, conflict)
    52  
    53  	key, conflict = KeyToHash(int64(3))
    54  	verifyHashProduct(t, 3, 0, key, conflict)
    55  }