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|
package http
import (
"bytes"
"context"
"fmt"
"io"
"strings"
"testing"
"github.com/aws/smithy-go/middleware"
)
func TestContentLengthMiddleware(t *testing.T) {
cases := map[string]struct {
Stream io.Reader
ExpectNilStream bool
ExpectLen int64
ExpectErr string
}{
// Cases
"bytes.Reader": {
Stream: bytes.NewReader(make([]byte, 10)),
ExpectLen: 10,
ExpectNilStream: false,
},
"bytes.Buffer": {
Stream: bytes.NewBuffer(make([]byte, 10)),
ExpectLen: 10,
ExpectNilStream: false,
},
"strings.Reader": {
Stream: strings.NewReader("hello"),
ExpectLen: 5,
ExpectNilStream: false,
},
"empty stream": {
Stream: strings.NewReader(""),
ExpectLen: 0,
ExpectNilStream: false,
},
"empty stream bytes": {
Stream: bytes.NewReader([]byte{}),
ExpectLen: 0,
ExpectNilStream: false,
},
"nil stream": {
ExpectLen: 0,
ExpectNilStream: true,
},
"un-seekable and no length": {
Stream: &basicReader{buf: make([]byte, 10)},
ExpectLen: -1,
ExpectNilStream: false,
},
"with error": {
Stream: &errorSecondSeekableReader{err: fmt.Errorf("seek failed")},
ExpectErr: "seek failed",
ExpectLen: -1,
ExpectNilStream: false,
},
}
for name, c := range cases {
t.Run(name, func(t *testing.T) {
var err error
req := NewStackRequest().(*Request)
req, err = req.SetStream(c.Stream)
if err != nil {
t.Fatalf("expect to set stream, %v", err)
}
var updatedRequest *Request
var m ComputeContentLength
_, _, err = m.HandleBuild(context.Background(),
middleware.BuildInput{Request: req},
middleware.BuildHandlerFunc(func(ctx context.Context, input middleware.BuildInput) (
out middleware.BuildOutput, metadata middleware.Metadata, err error) {
updatedRequest = input.Request.(*Request)
return out, metadata, nil
}),
)
if len(c.ExpectErr) != 0 {
if err == nil {
t.Fatalf("expect error, got none")
}
if e, a := c.ExpectErr, err.Error(); !strings.Contains(a, e) {
t.Fatalf("expect error to contain %q, got %v", e, a)
}
return
} else if err != nil {
t.Fatalf("expect no error, got %v", err)
}
if e, a := c.ExpectLen, updatedRequest.ContentLength; e != a {
t.Errorf("expect %v content-length, got %v", e, a)
}
if e, a := c.ExpectNilStream, updatedRequest.stream == nil; e != a {
t.Errorf("expect %v nil stream, got %v", e, a)
}
})
}
}
func TestContentLengthMiddleware_HeaderSet(t *testing.T) {
req := NewStackRequest().(*Request)
req.Header.Set("Content-Length", "1234")
var err error
req, err = req.SetStream(strings.NewReader("hello"))
if err != nil {
t.Fatalf("expect to set stream, %v", err)
}
var m ComputeContentLength
_, _, err = m.HandleBuild(context.Background(),
middleware.BuildInput{Request: req},
nopBuildHandler,
)
if err != nil {
t.Fatalf("expect middleware to run, %v", err)
}
if e, a := "1234", req.Header.Get("Content-Length"); e != a {
t.Errorf("expect Content-Length not to change, got %v", a)
}
}
var nopBuildHandler = middleware.BuildHandlerFunc(func(ctx context.Context, input middleware.BuildInput) (
out middleware.BuildOutput, metadata middleware.Metadata, err error) {
return out, metadata, nil
})
type basicReader struct {
buf []byte
}
func (r *basicReader) Read(p []byte) (int, error) {
n := copy(p, r.buf)
r.buf = r.buf[n:]
return n, nil
}
type errorSecondSeekableReader struct {
err error
count int
}
func (r *errorSecondSeekableReader) Read(p []byte) (int, error) {
return 0, io.EOF
}
func (r *errorSecondSeekableReader) Seek(offset int64, whence int) (int64, error) {
r.count++
if r.count == 2 {
return 0, r.err
}
return 0, nil
}
func TestValidateContentLengthHeader(t *testing.T) {
cases := map[string]struct {
contentLength int64
expectError string
}{
"success": {
contentLength: 10,
},
"length set to 0": {
contentLength: 0,
},
"content-length unset": {
contentLength: -1,
expectError: "content length for payload is required and must be at least 0",
},
}
for name, c := range cases {
t.Run(name, func(t *testing.T) {
var err error
req := NewStackRequest().(*Request)
req.ContentLength = c.contentLength
var m validateContentLength
_, _, err = m.HandleBuild(context.Background(),
middleware.BuildInput{Request: req},
nopBuildHandler,
)
if len(c.expectError) != 0 {
if err == nil {
t.Fatalf("expect error, got none")
}
if e, a := c.expectError, err.Error(); !strings.Contains(a, e) {
t.Fatalf("expect error to contain %q, got %v", e, a)
}
} else if err != nil {
t.Fatalf("expect no error, got %v", err)
}
})
}
}
|
