github.com/dolthub/go-mysql-server@v0.18.0/sql/expression/function/lower_upper_test.go (about)

     1  // Copyright 2020-2021 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package function
    16  
    17  import (
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/require"
    21  
    22  	"github.com/dolthub/go-mysql-server/sql"
    23  	"github.com/dolthub/go-mysql-server/sql/expression"
    24  	"github.com/dolthub/go-mysql-server/sql/types"
    25  )
    26  
    27  func TestLower(t *testing.T) {
    28  	testCases := []struct {
    29  		name     string
    30  		rowType  sql.Type
    31  		row      sql.Row
    32  		expected interface{}
    33  	}{
    34  		{"text nil", types.LongText, sql.NewRow(nil), nil},
    35  		{"text ok", types.LongText, sql.NewRow("LoWeR"), "lower"},
    36  		{"binary ok", types.Blob, sql.NewRow([]byte("LoWeR")), "LoWeR"},
    37  		{"other type", types.Int32, sql.NewRow(int32(1)), "1"},
    38  	}
    39  
    40  	for _, tt := range testCases {
    41  		f := NewLower(expression.NewGetField(0, tt.rowType, "", true))
    42  
    43  		t.Run(tt.name, func(t *testing.T) {
    44  			require.Equal(t, tt.expected, eval(t, f, tt.row))
    45  		})
    46  
    47  		req := require.New(t)
    48  		req.True(f.IsNullable())
    49  		req.Equal(tt.rowType, f.Type())
    50  	}
    51  }
    52  
    53  func TestUpper(t *testing.T) {
    54  	testCases := []struct {
    55  		name     string
    56  		rowType  sql.Type
    57  		row      sql.Row
    58  		expected interface{}
    59  	}{
    60  		{"text nil", types.LongText, sql.NewRow(nil), nil},
    61  		{"text ok", types.LongText, sql.NewRow("UpPeR"), "UPPER"},
    62  		{"binary ok", types.Blob, sql.NewRow([]byte("UpPeR")), "UpPeR"},
    63  		{"other type", types.Int32, sql.NewRow(int32(1)), "1"},
    64  	}
    65  
    66  	for _, tt := range testCases {
    67  		f := NewUpper(expression.NewGetField(0, tt.rowType, "", true))
    68  
    69  		t.Run(tt.name, func(t *testing.T) {
    70  			require.Equal(t, tt.expected, eval(t, f, tt.row))
    71  		})
    72  
    73  		req := require.New(t)
    74  		req.True(f.IsNullable())
    75  		req.Equal(tt.rowType, f.Type())
    76  	}
    77  }