github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/sem/tree/placeholders_test.go (about)

     1  // Copyright 2019 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package tree
    12  
    13  import (
    14  	"fmt"
    15  	"testing"
    16  
    17  	"github.com/cockroachdb/cockroach/pkg/sql/types"
    18  	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
    19  )
    20  
    21  func TestPlaceholderTypesEquals(t *testing.T) {
    22  	defer leaktest.AfterTest(t)()
    23  	testCases := []struct {
    24  		a, b  PlaceholderTypes
    25  		equal bool
    26  	}{
    27  		{ // 0
    28  			PlaceholderTypes{},
    29  			PlaceholderTypes{},
    30  			true,
    31  		},
    32  		{ // 1
    33  			PlaceholderTypes{types.Int, types.Int},
    34  			PlaceholderTypes{types.Int, types.Int},
    35  			true,
    36  		},
    37  		{ // 2
    38  			PlaceholderTypes{types.Int},
    39  			PlaceholderTypes{types.Int, types.Int},
    40  			false,
    41  		},
    42  		{ // 3
    43  			PlaceholderTypes{types.Int, nil},
    44  			PlaceholderTypes{types.Int, types.Int},
    45  			false,
    46  		},
    47  		{ // 4
    48  			PlaceholderTypes{types.Int, types.Int},
    49  			PlaceholderTypes{types.Int, nil},
    50  			false,
    51  		},
    52  		{ // 5
    53  			PlaceholderTypes{types.Int, nil},
    54  			PlaceholderTypes{types.Int, nil},
    55  			true,
    56  		},
    57  		{ // 6
    58  			PlaceholderTypes{types.Int},
    59  			PlaceholderTypes{types.Int, nil},
    60  			false,
    61  		},
    62  	}
    63  	for i, tc := range testCases {
    64  		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
    65  			res := tc.a.Equals(tc.b)
    66  			if res != tc.equal {
    67  				t.Errorf("%v vs %v: expected %t, got %t", tc.a, tc.b, tc.equal, res)
    68  			}
    69  			res2 := tc.b.Equals(tc.a)
    70  			if res != res2 {
    71  				t.Errorf("%v vs %v: not commutative", tc.a, tc.b)
    72  			}
    73  		})
    74  	}
    75  }