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 }