vitess.io/vitess@v0.16.2/go/vt/vtgate/planbuilder/horizon_planning_test.go (about)

     1  /*
     2  Copyright 2021 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 planbuilder
    18  
    19  import (
    20  	"testing"
    21  
    22  	"github.com/stretchr/testify/assert"
    23  
    24  	"vitess.io/vitess/go/vt/vtgate/semantics"
    25  
    26  	"vitess.io/vitess/go/vt/sqlparser"
    27  )
    28  
    29  func TestCheckIfAlreadyExists(t *testing.T) {
    30  	tests := []struct {
    31  		name string
    32  		expr *sqlparser.AliasedExpr
    33  		sel  *sqlparser.Select
    34  		want int
    35  	}{
    36  		{
    37  			name: "No alias, both ColName",
    38  			want: 0,
    39  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")},
    40  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")}}},
    41  		},
    42  		{
    43  			name: "Aliased expression and ColName",
    44  			want: 0,
    45  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("user_id")},
    46  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.AliasedExpr{As: sqlparser.NewIdentifierCI("user_id"), Expr: sqlparser.NewColName("id")}}},
    47  		},
    48  		{
    49  			name: "Non-ColName expressions",
    50  			want: 0,
    51  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewStrLiteral("test")},
    52  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.AliasedExpr{Expr: sqlparser.NewStrLiteral("test")}}},
    53  		},
    54  		{
    55  			name: "No alias, multiple ColName in projection",
    56  			want: 1,
    57  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")},
    58  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.AliasedExpr{Expr: sqlparser.NewColName("foo")}, &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")}}},
    59  		},
    60  		{
    61  			name: "No matching entry",
    62  			want: -1,
    63  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")},
    64  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.AliasedExpr{Expr: sqlparser.NewColName("foo")}, &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("name")}}},
    65  		},
    66  		{
    67  			name: "No AliasedExpr in projection",
    68  			want: -1,
    69  			expr: &sqlparser.AliasedExpr{Expr: sqlparser.NewColName("id")},
    70  			sel:  &sqlparser.Select{SelectExprs: []sqlparser.SelectExpr{&sqlparser.StarExpr{TableName: sqlparser.TableName{Name: sqlparser.NewIdentifierCS("user")}}, &sqlparser.StarExpr{TableName: sqlparser.TableName{Name: sqlparser.NewIdentifierCS("people")}}}},
    71  		},
    72  	}
    73  	for _, tt := range tests {
    74  		semTable := semantics.EmptySemTable()
    75  		t.Run(tt.name, func(t *testing.T) {
    76  			got := checkIfAlreadyExists(tt.expr, tt.sel, semTable)
    77  			assert.Equal(t, tt.want, got)
    78  		})
    79  	}
    80  }