go.etcd.io/etcd@v3.3.27+incompatible/pkg/ioutil/readcloser_test.go (about) 1 // Copyright 2016 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package ioutil 16 17 import ( 18 "bytes" 19 "io" 20 "testing" 21 ) 22 23 type readerNilCloser struct{ io.Reader } 24 25 func (rc *readerNilCloser) Close() error { return nil } 26 27 // TestExactReadCloserExpectEOF expects an eof when reading too much. 28 func TestExactReadCloserExpectEOF(t *testing.T) { 29 buf := bytes.NewBuffer(make([]byte, 10)) 30 rc := NewExactReadCloser(&readerNilCloser{buf}, 1) 31 if _, err := rc.Read(make([]byte, 10)); err != ErrExpectEOF { 32 t.Fatalf("expected %v, got %v", ErrExpectEOF, err) 33 } 34 } 35 36 // TestExactReadCloserShort expects an eof when reading too little 37 func TestExactReadCloserShort(t *testing.T) { 38 buf := bytes.NewBuffer(make([]byte, 5)) 39 rc := NewExactReadCloser(&readerNilCloser{buf}, 10) 40 if _, err := rc.Read(make([]byte, 10)); err != nil { 41 t.Fatalf("Read expected nil err, got %v", err) 42 } 43 if err := rc.Close(); err != ErrShortRead { 44 t.Fatalf("Close expected %v, got %v", ErrShortRead, err) 45 } 46 }