mirror of https://github.com/prometheus/prometheus
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
2.7 KiB
106 lines
2.7 KiB
// Copyright 2019 The Prometheus Authors |
|
// Licensed under the Apache License, Version 2.0 (the "License"); |
|
// you may not use this file except in compliance with the License. |
|
// You may obtain a copy of the License at |
|
// |
|
// http://www.apache.org/licenses/LICENSE-2.0 |
|
// |
|
// Unless required by applicable law or agreed to in writing, software |
|
// distributed under the License is distributed on an "AS IS" BASIS, |
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
// See the License for the specific language governing permissions and |
|
// limitations under the License. |
|
package remote |
|
|
|
import ( |
|
"bytes" |
|
"io" |
|
"testing" |
|
|
|
"github.com/stretchr/testify/require" |
|
) |
|
|
|
type mockedFlusher struct { |
|
flushed int |
|
} |
|
|
|
func (f *mockedFlusher) Flush() { |
|
f.flushed++ |
|
} |
|
|
|
func TestChunkedReaderCanReadFromChunkedWriter(t *testing.T) { |
|
b := &bytes.Buffer{} |
|
f := &mockedFlusher{} |
|
w := NewChunkedWriter(b, f) |
|
r := NewChunkedReader(b, 20, nil) |
|
|
|
msgs := [][]byte{ |
|
[]byte("test1"), |
|
[]byte("test2"), |
|
[]byte("test3"), |
|
[]byte("test4"), |
|
{}, // This is ignored by writer. |
|
[]byte("test5-after-empty"), |
|
} |
|
|
|
for _, msg := range msgs { |
|
n, err := w.Write(msg) |
|
require.NoError(t, err) |
|
require.Equal(t, len(msg), n) |
|
} |
|
|
|
i := 0 |
|
for ; i < 4; i++ { |
|
msg, err := r.Next() |
|
require.NoError(t, err) |
|
require.Less(t, i, len(msgs), "more messages then expected") |
|
require.Equal(t, msgs[i], msg) |
|
} |
|
|
|
// Empty byte slice is skipped. |
|
i++ |
|
|
|
msg, err := r.Next() |
|
require.NoError(t, err) |
|
require.Less(t, i, len(msgs), "more messages then expected") |
|
require.Equal(t, msgs[i], msg) |
|
|
|
_, err = r.Next() |
|
require.Error(t, err, "expected io.EOF") |
|
require.Equal(t, io.EOF, err) |
|
|
|
require.Equal(t, 5, f.flushed) |
|
} |
|
|
|
func TestChunkedReader_Overflow(t *testing.T) { |
|
b := &bytes.Buffer{} |
|
_, err := NewChunkedWriter(b, &mockedFlusher{}).Write([]byte("twelve bytes")) |
|
require.NoError(t, err) |
|
|
|
b2 := make([]byte, 12) |
|
copy(b2, b.Bytes()) |
|
|
|
ret, err := NewChunkedReader(b, 12, nil).Next() |
|
require.NoError(t, err) |
|
require.Equal(t, "twelve bytes", string(ret)) |
|
|
|
_, err = NewChunkedReader(bytes.NewReader(b2), 11, nil).Next() |
|
require.Error(t, err, "expect exceed limit error") |
|
require.Equal(t, "chunkedReader: message size exceeded the limit 11 bytes; got: 12 bytes", err.Error()) |
|
} |
|
|
|
func TestChunkedReader_CorruptedFrame(t *testing.T) { |
|
b := &bytes.Buffer{} |
|
w := NewChunkedWriter(b, &mockedFlusher{}) |
|
|
|
n, err := w.Write([]byte("test1")) |
|
require.NoError(t, err) |
|
require.Equal(t, 5, n) |
|
|
|
bs := b.Bytes() |
|
bs[9] = 1 // Malform the frame by changing one byte. |
|
|
|
_, err = NewChunkedReader(bytes.NewReader(bs), 20, nil).Next() |
|
require.Error(t, err, "expected malformed frame") |
|
require.Equal(t, "chunkedReader: corrupted frame; checksum mismatch", err.Error()) |
|
}
|
|
|