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testgen.go
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testgen.go
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package gen
import (
"io"
"text/template"
)
var (
marshalTestTempl = template.New("MarshalTest")
encodeTestTempl = template.New("EncodeTest")
)
// TODO(philhofer):
// for simplicity's sake, right now
// we can only generate tests for types
// that can be initialized with the
// "Type{}" syntax.
// we should support all the types.
func mtest(w io.Writer) *mtestGen {
return &mtestGen{w: w}
}
type mtestGen struct {
passes
w io.Writer
}
func (m *mtestGen) Execute(p Elem) error {
p = m.applyall(p)
if p != nil && IsPrintable(p) {
switch p.(type) {
case *Struct, *Array, *Slice, *Map:
return marshalTestTempl.Execute(m.w, p)
}
}
return nil
}
func (m *mtestGen) Method() Method { return marshaltest }
type etestGen struct {
passes
w io.Writer
}
func etest(w io.Writer) *etestGen {
return &etestGen{w: w}
}
func (e *etestGen) Execute(p Elem) error {
p = e.applyall(p)
if p != nil && IsPrintable(p) {
switch p.(type) {
case *Struct, *Array, *Slice, *Map:
return encodeTestTempl.Execute(e.w, p)
}
}
return nil
}
func (e *etestGen) Method() Method { return encodetest }
func init() {
template.Must(marshalTestTempl.Parse(`func TestMarshalUnmarshal{{.TypeName}}(t *testing.T) {
v := {{.TypeName}}{}
bts, err := v.MarshalMsg(nil)
if err != nil {
t.Fatal(err)
}
left, err := v.UnmarshalMsg(bts)
if err != nil {
t.Fatal(err)
}
if len(left) > 0 {
t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
}
left, err = msgp.Skip(bts)
if err != nil {
t.Fatal(err)
}
if len(left) > 0 {
t.Errorf("%d bytes left over after Skip(): %q", len(left), left)
}
}
func BenchmarkMarshalMsg{{.TypeName}}(b *testing.B) {
v := {{.TypeName}}{}
b.ReportAllocs()
b.ResetTimer()
for i:=0; i<b.N; i++ {
v.MarshalMsg(nil)
}
}
func BenchmarkAppendMsg{{.TypeName}}(b *testing.B) {
v := {{.TypeName}}{}
bts := make([]byte, 0, v.Msgsize())
bts, _ = v.MarshalMsg(bts[0:0])
b.SetBytes(int64(len(bts)))
b.ReportAllocs()
b.ResetTimer()
for i:=0; i<b.N; i++ {
bts, _ = v.MarshalMsg(bts[0:0])
}
}
func BenchmarkUnmarshal{{.TypeName}}(b *testing.B) {
v := {{.TypeName}}{}
bts, _ := v.MarshalMsg(nil)
b.ReportAllocs()
b.SetBytes(int64(len(bts)))
b.ResetTimer()
for i:=0; i<b.N; i++ {
_, err := v.UnmarshalMsg(bts)
if err != nil {
b.Fatal(err)
}
}
}
`))
template.Must(encodeTestTempl.Parse(`func TestEncodeDecode{{.TypeName}}(t *testing.T) {
v := {{.TypeName}}{}
var buf bytes.Buffer
msgp.Encode(&buf, &v)
m := v.Msgsize()
if buf.Len() > m {
t.Log("WARNING: TestEncodeDecode{{.TypeName}} Msgsize() is inaccurate")
}
vn := {{.TypeName}}{}
err := msgp.Decode(&buf, &vn)
if err != nil {
t.Error(err)
}
buf.Reset()
msgp.Encode(&buf, &v)
err = msgp.NewReader(&buf).Skip()
if err != nil {
t.Error(err)
}
}
func BenchmarkEncode{{.TypeName}}(b *testing.B) {
v := {{.TypeName}}{}
var buf bytes.Buffer
msgp.Encode(&buf, &v)
b.SetBytes(int64(buf.Len()))
en := msgp.NewWriter(msgp.Nowhere)
b.ReportAllocs()
b.ResetTimer()
for i:=0; i<b.N; i++ {
v.EncodeMsg(en)
}
en.Flush()
}
func BenchmarkDecode{{.TypeName}}(b *testing.B) {
v := {{.TypeName}}{}
var buf bytes.Buffer
msgp.Encode(&buf, &v)
b.SetBytes(int64(buf.Len()))
rd := msgp.NewEndlessReader(buf.Bytes(), b)
dc := msgp.NewReader(rd)
b.ReportAllocs()
b.ResetTimer()
for i:=0; i<b.N; i++ {
err := v.DecodeMsg(dc)
if err != nil {
b.Fatal(err)
}
}
}
`))
}