github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/libraries/doltcore/schema/collation_comparator_test.go (about)

     1  // Copyright 2023 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 schema
    16  
    17  import (
    18  	"fmt"
    19  	"testing"
    20  
    21  	"github.com/dolthub/go-mysql-server/sql"
    22  	"github.com/stretchr/testify/require"
    23  )
    24  
    25  func TestCompareCollatedStrings(t *testing.T) {
    26  	tests := []struct {
    27  		name  string
    28  		left  []byte
    29  		right []byte
    30  		exp   int
    31  	}{
    32  		{
    33  			left:  []byte("Hello, 人"),
    34  			right: []byte("Hello, 亻"),
    35  			exp:   -1,
    36  		},
    37  		{
    38  			left:  []byte("woÒ"),
    39  			right: []byte("woÓ"),
    40  			exp:   0,
    41  		},
    42  		{
    43  			left:  []byte("\u07FB"),
    44  			right: []byte("\u07FC"),
    45  			exp:   -1,
    46  		},
    47  		{
    48  			left:  []byte("˧"),
    49  			right: []byte("˦"),
    50  			exp:   1,
    51  		},
    52  		{
    53  			left:  []byte("ƵƶzƸ"),
    54  			right: []byte("ƵƶzƷ"),
    55  			exp:   1,
    56  		},
    57  	}
    58  
    59  	for _, tt := range tests {
    60  		t.Run(fmt.Sprintf("%s vs %s", tt.left, tt.right), func(t *testing.T) {
    61  			cmp := compareCollatedStrings(sql.Collation_utf8mb4_0900_ai_ci, tt.left, tt.right)
    62  			require.Equal(t, tt.exp, cmp)
    63  		})
    64  	}
    65  }