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Source file src/mime/multipart/writer_test.go

Documentation: mime/multipart

  // Copyright 2011 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package multipart
  
  import (
  	"bytes"
  	"io/ioutil"
  	"net/textproto"
  	"strings"
  	"testing"
  )
  
  func TestWriter(t *testing.T) {
  	fileContents := []byte("my file contents")
  
  	var b bytes.Buffer
  	w := NewWriter(&b)
  	{
  		part, err := w.CreateFormFile("myfile", "my-file.txt")
  		if err != nil {
  			t.Fatalf("CreateFormFile: %v", err)
  		}
  		part.Write(fileContents)
  		err = w.WriteField("key", "val")
  		if err != nil {
  			t.Fatalf("WriteField: %v", err)
  		}
  		part.Write([]byte("val"))
  		err = w.Close()
  		if err != nil {
  			t.Fatalf("Close: %v", err)
  		}
  		s := b.String()
  		if len(s) == 0 {
  			t.Fatal("String: unexpected empty result")
  		}
  		if s[0] == '\r' || s[0] == '\n' {
  			t.Fatal("String: unexpected newline")
  		}
  	}
  
  	r := NewReader(&b, w.Boundary())
  
  	part, err := r.NextPart()
  	if err != nil {
  		t.Fatalf("part 1: %v", err)
  	}
  	if g, e := part.FormName(), "myfile"; g != e {
  		t.Errorf("part 1: want form name %q, got %q", e, g)
  	}
  	slurp, err := ioutil.ReadAll(part)
  	if err != nil {
  		t.Fatalf("part 1: ReadAll: %v", err)
  	}
  	if e, g := string(fileContents), string(slurp); e != g {
  		t.Errorf("part 1: want contents %q, got %q", e, g)
  	}
  
  	part, err = r.NextPart()
  	if err != nil {
  		t.Fatalf("part 2: %v", err)
  	}
  	if g, e := part.FormName(), "key"; g != e {
  		t.Errorf("part 2: want form name %q, got %q", e, g)
  	}
  	slurp, err = ioutil.ReadAll(part)
  	if err != nil {
  		t.Fatalf("part 2: ReadAll: %v", err)
  	}
  	if e, g := "val", string(slurp); e != g {
  		t.Errorf("part 2: want contents %q, got %q", e, g)
  	}
  
  	part, err = r.NextPart()
  	if part != nil || err == nil {
  		t.Fatalf("expected end of parts; got %v, %v", part, err)
  	}
  }
  
  func TestWriterSetBoundary(t *testing.T) {
  	tests := []struct {
  		b  string
  		ok bool
  	}{
  		{"abc", true},
  		{"", false},
  		{"ungültig", false},
  		{"!", false},
  		{strings.Repeat("x", 70), true},
  		{strings.Repeat("x", 71), false},
  		{"bad!ascii!", false},
  		{"my-separator", true},
  		{"with space", true},
  		{"badspace ", false},
  	}
  	for i, tt := range tests {
  		var b bytes.Buffer
  		w := NewWriter(&b)
  		err := w.SetBoundary(tt.b)
  		got := err == nil
  		if got != tt.ok {
  			t.Errorf("%d. boundary %q = %v (%v); want %v", i, tt.b, got, err, tt.ok)
  		} else if tt.ok {
  			got := w.Boundary()
  			if got != tt.b {
  				t.Errorf("boundary = %q; want %q", got, tt.b)
  			}
  			w.Close()
  			wantSub := "\r\n--" + tt.b + "--\r\n"
  			if got := b.String(); !strings.Contains(got, wantSub) {
  				t.Errorf("expected %q in output. got: %q", wantSub, got)
  			}
  		}
  	}
  }
  
  func TestWriterBoundaryGoroutines(t *testing.T) {
  	// Verify there's no data race accessing any lazy boundary if it's used by
  	// different goroutines. This was previously broken by
  	// https://codereview.appspot.com/95760043/ and reverted in
  	// https://codereview.appspot.com/117600043/
  	w := NewWriter(ioutil.Discard)
  	done := make(chan int)
  	go func() {
  		w.CreateFormField("foo")
  		done <- 1
  	}()
  	w.Boundary()
  	<-done
  }
  
  func TestSortedHeader(t *testing.T) {
  	var buf bytes.Buffer
  	w := NewWriter(&buf)
  	if err := w.SetBoundary("MIMEBOUNDARY"); err != nil {
  		t.Fatalf("Error setting mime boundary: %v", err)
  	}
  
  	header := textproto.MIMEHeader{
  		"A": {"2"},
  		"B": {"5", "7", "6"},
  		"C": {"4"},
  		"M": {"3"},
  		"Z": {"1"},
  	}
  
  	part, err := w.CreatePart(header)
  	if err != nil {
  		t.Fatalf("Unable to create part: %v", err)
  	}
  	part.Write([]byte("foo"))
  
  	w.Close()
  
  	want := "--MIMEBOUNDARY\r\nA: 2\r\nB: 5\r\nB: 7\r\nB: 6\r\nC: 4\r\nM: 3\r\nZ: 1\r\n\r\nfoo\r\n--MIMEBOUNDARY--\r\n"
  	if want != buf.String() {
  		t.Fatalf("\n got: %q\nwant: %q\n", buf.String(), want)
  	}
  }
  

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