go.mway.dev/x@v0.0.0-20240520034138-950aede9a3fb/slices/slices_test.go (about)

     1  // Copyright (c) 2024 Matt Way
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to
     5  // deal in the Software without restriction, including without limitation the
     6  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
     7  // sell copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    18  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
    19  // IN THE THE SOFTWARE.
    20  
    21  package slices_test
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/stretchr/testify/require"
    27  	"go.mway.dev/x/slices"
    28  )
    29  
    30  func TestHasPrefix(t *testing.T) {
    31  	cases := map[string]struct {
    32  		giveSlice     []int
    33  		givePrefix    []int
    34  		wantHasPrefix bool
    35  	}{
    36  		"nil slice nil prefix": {
    37  			giveSlice:     nil,
    38  			givePrefix:    nil,
    39  			wantHasPrefix: true,
    40  		},
    41  		"non-nil slice nil prefix": {
    42  			giveSlice:     []int{0},
    43  			givePrefix:    nil,
    44  			wantHasPrefix: true,
    45  		},
    46  		"not prefixed": {
    47  			giveSlice:     []int{0, 1, 2},
    48  			givePrefix:    []int{1, 2},
    49  			wantHasPrefix: false,
    50  		},
    51  		"prefixed": {
    52  			giveSlice:     []int{0, 1, 2},
    53  			givePrefix:    []int{0, 1},
    54  			wantHasPrefix: true,
    55  		},
    56  		"equal": {
    57  			giveSlice:     []int{0, 1, 2},
    58  			givePrefix:    []int{0, 1, 2},
    59  			wantHasPrefix: true,
    60  		},
    61  		"prefix too long": {
    62  			giveSlice:     []int{0, 1},
    63  			givePrefix:    []int{0, 1, 2},
    64  			wantHasPrefix: false,
    65  		},
    66  	}
    67  
    68  	for name, tt := range cases {
    69  		t.Run(name, func(t *testing.T) {
    70  			require.Equal(
    71  				t,
    72  				tt.wantHasPrefix,
    73  				slices.HasPrefix(tt.giveSlice, tt.givePrefix),
    74  			)
    75  		})
    76  	}
    77  }