streaming_test.go

Documentation: k8s.io/apimachinery/pkg/runtime/serializer/streaming

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package streaming
    18  
    19  import (
    20  	"bytes"
    21  	"io"
    22  	"io/ioutil"
    23  	"testing"
    24  
    25  	"k8s.io/apimachinery/pkg/runtime"
    26  	"k8s.io/apimachinery/pkg/runtime/schema"
    27  	"k8s.io/apimachinery/pkg/util/framer"
    28  )
    29  
    30  type fakeDecoder struct {
    31  	got []byte
    32  	obj runtime.Object
    33  	err error
    34  }
    35  
    36  func (d *fakeDecoder) Decode(data []byte, gvk *schema.GroupVersionKind, into runtime.Object) (runtime.Object, *schema.GroupVersionKind, error) {
    37  	d.got = data
    38  	return d.obj, nil, d.err
    39  }
    40  
    41  func TestEmptyDecoder(t *testing.T) {
    42  	buf := bytes.NewBuffer([]byte{})
    43  	d := &fakeDecoder{}
    44  	_, _, err := NewDecoder(ioutil.NopCloser(buf), d).Decode(nil, nil)
    45  	if err != io.EOF {
    46  		t.Fatal(err)
    47  	}
    48  }
    49  
    50  func TestDecoder(t *testing.T) {
    51  	frames := [][]byte{
    52  		make([]byte, 1025),
    53  		make([]byte, 1024*5),
    54  		make([]byte, 1024*1024*17),
    55  		make([]byte, 1025),
    56  	}
    57  	pr, pw := io.Pipe()
    58  	fw := framer.NewLengthDelimitedFrameWriter(pw)
    59  	go func() {
    60  		for i := range frames {
    61  			fw.Write(frames[i])
    62  		}
    63  		pw.Close()
    64  	}()
    65  
    66  	r := framer.NewLengthDelimitedFrameReader(pr)
    67  	d := &fakeDecoder{}
    68  	dec := NewDecoder(r, d)
    69  	if _, _, err := dec.Decode(nil, nil); err != nil || !bytes.Equal(d.got, frames[0]) {
    70  		t.Fatalf("unexpected %v %v", err, len(d.got))
    71  	}
    72  	if _, _, err := dec.Decode(nil, nil); err != nil || !bytes.Equal(d.got, frames[1]) {
    73  		t.Fatalf("unexpected %v %v", err, len(d.got))
    74  	}
    75  	if _, _, err := dec.Decode(nil, nil); err != ErrObjectTooLarge || !bytes.Equal(d.got, frames[1]) {
    76  		t.Fatalf("unexpected %v %v", err, len(d.got))
    77  	}
    78  	if _, _, err := dec.Decode(nil, nil); err != nil || !bytes.Equal(d.got, frames[3]) {
    79  		t.Fatalf("unexpected %v %v", err, len(d.got))
    80  	}
    81  	if _, _, err := dec.Decode(nil, nil); err != io.EOF {
    82  		t.Fatalf("unexpected %v %v", err, len(d.got))
    83  	}
    84  }
    85
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