github.com/Finschia/finschia-sdk@v0.48.1/client/input/input_test.go (about)

     1  package input
     2  
     3  import (
     4  	"bufio"
     5  	"errors"
     6  	"io"
     7  	"testing"
     8  
     9  	"github.com/stretchr/testify/require"
    10  )
    11  
    12  type fakeReader struct {
    13  	fnc func(p []byte) (int, error)
    14  }
    15  
    16  func (f fakeReader) Read(p []byte) (int, error) {
    17  	return f.fnc(p)
    18  }
    19  
    20  var _ io.Reader = fakeReader{}
    21  
    22  func TestReadLineFromBuf(t *testing.T) {
    23  	var fr fakeReader
    24  
    25  	t.Run("it correctly returns the password when reader returns EOF", func(t *testing.T) {
    26  		fr.fnc = func(p []byte) (int, error) {
    27  			return copy(p, []byte("hello")), io.EOF
    28  		}
    29  		buf := bufio.NewReader(fr)
    30  
    31  		pass, err := readLineFromBuf(buf)
    32  		require.NoError(t, err)
    33  		require.Equal(t, "hello", pass)
    34  	})
    35  
    36  	t.Run("it returns EOF if reader has been exhausted", func(t *testing.T) {
    37  		fr.fnc = func(p []byte) (int, error) {
    38  			return 0, io.EOF
    39  		}
    40  		buf := bufio.NewReader(fr)
    41  
    42  		_, err := readLineFromBuf(buf)
    43  		require.ErrorIs(t, err, io.EOF)
    44  	})
    45  
    46  	t.Run("it returns the error if it's not EOF regardles if it read something or not", func(t *testing.T) {
    47  		expectedErr := errors.New("oh no")
    48  		fr.fnc = func(p []byte) (int, error) {
    49  			return copy(p, []byte("hello")), expectedErr
    50  		}
    51  		buf := bufio.NewReader(fr)
    52  
    53  		_, err := readLineFromBuf(buf)
    54  		require.ErrorIs(t, err, expectedErr)
    55  	})
    56  }