(t *testing.T)
| 151 | } |
| 152 | |
| 153 | func TestBufferedReaderInvalidatesBufferOnErr(t *testing.T) { |
| 154 | erroringReaderAt := &erroringReaderAt{ |
| 155 | err: nil, |
| 156 | } |
| 157 | |
| 158 | r := NewBufferedReaderAt(erroringReaderAt, 100, 50, 1) |
| 159 | |
| 160 | // force the reader to return an error |
| 161 | erroringReaderAt.err = errors.New("error") |
| 162 | actual := make([]byte, 10) |
| 163 | read, err := r.ReadAt(actual, 0) |
| 164 | require.Error(t, err) |
| 165 | require.Equal(t, 0, read) |
| 166 | require.Equal(t, []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, actual) // first 10 bytes should be zeroed |
| 167 | |
| 168 | // clear the error and read the first 10 bytes again |
| 169 | erroringReaderAt.err = nil |
| 170 | actual = make([]byte, 10) |
| 171 | read, err = r.ReadAt(actual, 0) |
| 172 | require.NoError(t, err) |
| 173 | require.Equal(t, 10, read) |
| 174 | require.Equal(t, []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, actual) // first 10 bytes should be read |
| 175 | |
| 176 | // force the reader to return io.EOF and see it handled correctly |
| 177 | erroringReaderAt.err = io.EOF |
| 178 | actual = make([]byte, 10) |
| 179 | read, err = r.ReadAt(actual, 90) |
| 180 | require.ErrorIs(t, err, io.EOF) |
| 181 | require.Equal(t, 10, read) |
| 182 | require.Equal(t, []byte{90, 91, 92, 93, 94, 95, 96, 97, 98, 99}, actual) // last 10 bytes should be read |
| 183 | } |
nothing calls this directly
no test coverage detected