go.mway.dev/x@v0.0.0-20240520034138-950aede9a3fb/io/nop_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 io
    22  
    23  import (
    24  	"io"
    25  	"testing"
    26  
    27  	"github.com/stretchr/testify/require"
    28  )
    29  
    30  func TestNop(t *testing.T) {
    31  	var (
    32  		x   nop
    33  		b   []byte
    34  		n   int
    35  		err error
    36  	)
    37  
    38  	n, err = x.Read(make([]byte, 8))
    39  	require.Equal(t, 0, n)
    40  	require.ErrorIs(t, err, io.EOF)
    41  
    42  	b, err = io.ReadAll(x)
    43  	require.Len(t, b, 0)
    44  	require.NoError(t, err)
    45  
    46  	n, err = x.Write([]byte("hello"))
    47  	require.Equal(t, 5, n)
    48  	require.NoError(t, err)
    49  
    50  	n, err = x.WriteString("hello")
    51  	require.Equal(t, 5, n)
    52  	require.NoError(t, err)
    53  
    54  	require.NoError(t, x.Close())
    55  	require.NoError(t, x.Close())
    56  }