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88 lines
2.1 KiB
88 lines
2.1 KiB
package encoding
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import (
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"encoding/xml"
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"fmt"
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"runtime/debug"
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"testing"
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)
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type codec struct{}
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func (c codec) Marshal(v interface{}) ([]byte, error) {
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panic("implement me")
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}
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func (c codec) Unmarshal(data []byte, v interface{}) error {
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panic("implement me")
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}
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func (c codec) Name() string {
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return ""
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}
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// codec2 is a Codec implementation with xml.
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type codec2 struct{}
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func (codec2) Marshal(v interface{}) ([]byte, error) {
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return xml.Marshal(v)
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}
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func (codec2) Unmarshal(data []byte, v interface{}) error {
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return xml.Unmarshal(data, v)
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}
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func (codec2) Name() string {
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return "xml"
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}
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func TestRegisterCodec(t *testing.T) {
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f := func() { RegisterCodec(nil) }
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funcDidPanic, panicValue, _ := didPanic(f)
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if !funcDidPanic {
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t.Fatalf(fmt.Sprintf("func should panic\n\tPanic value:\t%#v", panicValue))
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}
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if panicValue != "cannot register a nil Codec" {
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t.Fatalf("panic error got %s want cannot register a nil Codec", panicValue)
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}
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f = func() {
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RegisterCodec(codec{})
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}
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funcDidPanic, panicValue, _ = didPanic(f)
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if !funcDidPanic {
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t.Fatalf(fmt.Sprintf("func should panic\n\tPanic value:\t%#v", panicValue))
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}
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if panicValue != "cannot register Codec with empty string result for Name()" {
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t.Fatalf("panic error got %s want cannot register Codec with empty string result for Name()", panicValue)
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}
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codec := codec2{}
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RegisterCodec(codec)
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got := GetCodec("xml")
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if got != codec {
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t.Fatalf("RegisterCodec(%v) want %v got %v", codec, codec, got)
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}
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}
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// PanicTestFunc defines a func that should be passed to assert.Panics and assert.NotPanics
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// methods, and represents a simple func that takes no arguments, and returns nothing.
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type PanicTestFunc func()
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// didPanic returns true if the function passed to it panics. Otherwise, it returns false.
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func didPanic(f PanicTestFunc) (bool, interface{}, string) {
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didPanic := false
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var message interface{}
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var stack string
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func() {
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defer func() {
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if message = recover(); message != nil {
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didPanic = true
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stack = string(debug.Stack())
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}
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}()
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// call the target function
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f()
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}()
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return didPanic, message, stack
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}
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