github.com/bhojpur/cache@v0.0.4/pkg/ioutils/writers_test.go (about)

     1  package ioutils
     2  
     3  // Copyright (c) 2018 Bhojpur Consulting Private Limited, India. All rights reserved.
     4  
     5  // Permission is hereby granted, free of charge, to any person obtaining a copy
     6  // of this software and associated documentation files (the "Software"), to deal
     7  // in the Software without restriction, including without limitation the rights
     8  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     9  // copies of the Software, and to permit persons to whom the Software is
    10  // furnished to do so, subject to the following conditions:
    11  
    12  // The above copyright notice and this permission notice shall be included in
    13  // all copies or substantial portions of the Software.
    14  
    15  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    16  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    17  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    18  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    19  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    20  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    21  // THE SOFTWARE.
    22  
    23  import (
    24  	"bytes"
    25  	"strings"
    26  	"testing"
    27  )
    28  
    29  func TestWriteCloserWrapperClose(t *testing.T) {
    30  	called := false
    31  	writer := bytes.NewBuffer([]byte{})
    32  	wrapper := NewWriteCloserWrapper(writer, func() error {
    33  		called = true
    34  		return nil
    35  	})
    36  	if err := wrapper.Close(); err != nil {
    37  		t.Fatal(err)
    38  	}
    39  	if !called {
    40  		t.Fatalf("writeCloserWrapper should have call the anonymous function.")
    41  	}
    42  }
    43  
    44  func TestNopWriteCloser(t *testing.T) {
    45  	writer := bytes.NewBuffer([]byte{})
    46  	wrapper := NopWriteCloser(writer)
    47  	if err := wrapper.Close(); err != nil {
    48  		t.Fatal("NopWriteCloser always return nil on Close.")
    49  	}
    50  
    51  }
    52  
    53  func TestNopWriter(t *testing.T) {
    54  	nw := &NopWriter{}
    55  	l, err := nw.Write([]byte{'c'})
    56  	if err != nil {
    57  		t.Fatal(err)
    58  	}
    59  	if l != 1 {
    60  		t.Fatalf("Expected 1 got %d", l)
    61  	}
    62  }
    63  
    64  func TestWriteCounter(t *testing.T) {
    65  	dummy1 := "This is a dummy string."
    66  	dummy2 := "This is another dummy string."
    67  	totalLength := int64(len(dummy1) + len(dummy2))
    68  
    69  	reader1 := strings.NewReader(dummy1)
    70  	reader2 := strings.NewReader(dummy2)
    71  
    72  	var buffer bytes.Buffer
    73  	wc := NewWriteCounter(&buffer)
    74  
    75  	reader1.WriteTo(wc)
    76  	reader2.WriteTo(wc)
    77  
    78  	if wc.Count != totalLength {
    79  		t.Errorf("Wrong count: %d vs. %d", wc.Count, totalLength)
    80  	}
    81  
    82  	if buffer.String() != dummy1+dummy2 {
    83  		t.Error("Wrong message written")
    84  	}
    85  }