github.com/dolthub/go-mysql-server@v0.18.0/sql/expression/function/isbinary_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 TestIsBinary(t *testing.T) {
    28  	f := NewIsBinary(expression.NewGetField(0, types.Blob, "blob", true))
    29  
    30  	testCases := []struct {
    31  		name     string
    32  		row      sql.Row
    33  		expected bool
    34  	}{
    35  		{"binary", sql.NewRow([]byte{0, 1, 2}), true},
    36  		{"not binary", sql.NewRow([]byte{1, 2, 3}), false},
    37  		{"null", sql.NewRow(nil), false},
    38  	}
    39  
    40  	for _, tt := range testCases {
    41  		t.Run(tt.name, func(t *testing.T) {
    42  			require.Equal(t, tt.expected, eval(t, f, tt.row))
    43  		})
    44  	}
    45  }
    46  
    47  func TestSubstringArity(t *testing.T) {
    48  	expr := expression.NewGetField(0, types.Int64, "foo", false)
    49  	testCases := []struct {
    50  		name string
    51  		args []sql.Expression
    52  		ok   bool
    53  	}{
    54  		{"0 args", nil, false},
    55  		{"1 args", []sql.Expression{expr}, false},
    56  		{"2 args", []sql.Expression{expr, expr}, true},
    57  		{"3 args", []sql.Expression{expr, expr, expr}, true},
    58  		{"4 args", []sql.Expression{expr, expr, expr, expr}, false},
    59  	}
    60  
    61  	for _, tt := range testCases {
    62  		t.Run(tt.name, func(t *testing.T) {
    63  			require := require.New(t)
    64  			f, err := NewSubstring(tt.args...)
    65  			if tt.ok {
    66  				require.NotNil(f)
    67  				require.NoError(err)
    68  			} else {
    69  				require.Error(err)
    70  			}
    71  		})
    72  	}
    73  }