go.uber.org/yarpc@v1.72.1/x/yarpctest/stream.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package yarpctest
    22  
    23  import (
    24  	"bytes"
    25  	"io"
    26  	"io/ioutil"
    27  
    28  	"go.uber.org/yarpc/x/yarpctest/types"
    29  )
    30  
    31  // SendStreamMsg sends a message to a stream.
    32  func SendStreamMsg(sendMsg string) *types.SendStreamMsg {
    33  	return &types.SendStreamMsg{
    34  		BodyFunc: func() io.ReadCloser {
    35  			return ioutil.NopCloser(bytes.NewBufferString(sendMsg))
    36  		},
    37  	}
    38  }
    39  
    40  // SendStreamMsgAndExpectError sends a message on a stream and asserts on the
    41  // error returned.
    42  func SendStreamMsgAndExpectError(sendMsg string, wantErrMsgs ...string) *types.SendStreamMsg {
    43  	return &types.SendStreamMsg{
    44  		BodyFunc: func() io.ReadCloser {
    45  			return ioutil.NopCloser(bytes.NewBufferString(sendMsg))
    46  		},
    47  		WantErrMsgs: wantErrMsgs,
    48  	}
    49  }
    50  
    51  // SendStreamDecodeErrorAndExpectError induces a decode error on the stream
    52  // message and asserts on the result.
    53  func SendStreamDecodeErrorAndExpectError(decodeErr error, wantErrMsgs ...string) *types.SendStreamMsg {
    54  	return &types.SendStreamMsg{
    55  		BodyFunc: func() io.ReadCloser {
    56  			return ioutil.NopCloser(readErr{decodeErr})
    57  		},
    58  		WantErrMsgs: wantErrMsgs,
    59  	}
    60  }
    61  
    62  type readErr struct {
    63  	err error
    64  }
    65  
    66  func (r readErr) Read(p []byte) (n int, err error) {
    67  	return 0, r.err
    68  }
    69  
    70  // RecvStreamMsg waits to receive a message on a client stream.
    71  func RecvStreamMsg(wantMsg string) *types.RecvStreamMsg {
    72  	return &types.RecvStreamMsg{WantBody: bytes.NewBufferString(wantMsg).Bytes()}
    73  }
    74  
    75  // RecvStreamErr waits to receive a message on a client stream.  It expects
    76  // error messages.
    77  func RecvStreamErr(wantErrMsgs ...string) *types.RecvStreamMsg {
    78  	return &types.RecvStreamMsg{WantErrMsgs: wantErrMsgs}
    79  }
    80  
    81  // RecvStreamErrInstance waits to receive a message on a client stream.  It expects
    82  // an error.
    83  func RecvStreamErrInstance(wantErr error) *types.RecvStreamMsg {
    84  	return &types.RecvStreamMsg{WantErr: wantErr}
    85  }