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

     1  // Copyright 2022 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 sql_test
    16  
    17  import (
    18  	"fmt"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/assert"
    22  
    23  	"github.com/dolthub/go-mysql-server/sql"
    24  	"github.com/dolthub/go-mysql-server/sql/types"
    25  )
    26  
    27  func TestRangeCutCompare(t *testing.T) {
    28  	type tc struct {
    29  		left, right sql.RangeCut
    30  		res         int
    31  	}
    32  	for _, testcase := range []tc{
    33  		{sql.AboveAll{}, sql.BelowNull{}, 1},
    34  		{sql.AboveAll{}, sql.AboveNull{}, 1},
    35  		{sql.AboveAll{}, sql.Above{1}, 1},
    36  		{sql.AboveAll{}, sql.Below{1}, 1},
    37  		{sql.AboveAll{}, sql.AboveAll{}, 0},
    38  
    39  		{sql.Above{1}, sql.AboveNull{}, 1},
    40  		{sql.Above{1}, sql.BelowNull{}, 1},
    41  		{sql.Above{1}, sql.Above{1}, 0},
    42  		{sql.Above{1}, sql.Below{1}, 1},
    43  		{sql.Above{2}, sql.Above{1}, 1},
    44  
    45  		{sql.Below{1}, sql.AboveNull{}, 1},
    46  		{sql.Below{1}, sql.BelowNull{}, 1},
    47  		{sql.Below{1}, sql.Below{1}, 0},
    48  		{sql.Below{2}, sql.Below{1}, 1},
    49  
    50  		{sql.AboveNull{}, sql.BelowNull{}, 1},
    51  
    52  		{sql.BelowNull{}, sql.BelowNull{}, 0},
    53  	} {
    54  		t.Run(fmt.Sprintf("%s/%s = %d", testcase.left.String(), testcase.right.String(), testcase.res), func(t *testing.T) {
    55  			res, err := testcase.left.Compare(testcase.right, types.Int8)
    56  			assert.NoError(t, err)
    57  			assert.Equal(t, testcase.res, res, "forward Compare")
    58  
    59  			res, err = testcase.right.Compare(testcase.left, types.Int8)
    60  			assert.NoError(t, err)
    61  			assert.Equal(t, -testcase.res, res, "reverse Compare")
    62  		})
    63  	}
    64  }