func TestMultiStackSingleStack(t *testing.T) {
frame := stack.Frame{Name: "42"}
s := stack.Stack{frame}
var multi stack.Multi
multi.Add(s)
ensure.DeepEqual(t, MultiStack(&singleStackError{stack: s}), &multi)
}
func TestStackMultiStack(t *testing.T) {
frame := stack.Frame{Name: "42"}
s := stack.Stack{frame}
var multi stack.Multi
multi.Add(s)
ensure.DeepEqual(t, Stack(&multiStackError{multiStack: &multi}), s)
}
// MultiStack returns the best possible stack.Multi from the error or nil if
// one isn't found.
func MultiStack(err error) *stack.Multi {
switch err := err.(type) {
case *singleFrameError:
var m stack.Multi
m.Add(stack.Stack{err.frame})
return &m
case *singleStackError:
var m stack.Multi
m.Add(err.stack)
return &m
case *multiStackError:
return err.multiStack
}
return nil
}
func TestMultiStackStringModeNone(t *testing.T) {
err := errors.New("foo")
var m stack.Multi
m.Add(stack.Stack{
stack.Frame{
File: "f",
Line: 1,
Name: "n",
},
})
ensure.DeepEqual(
t,
(&multiStackError{
underlying: err,
config: Config{},
multiStack: &m,
}).Error(),
`foo`)
}
func TestMultiStackSingleFrame(t *testing.T) {
frame := stack.Frame{Name: "42"}
var multi stack.Multi
multi.Add(stack.Stack{frame})
ensure.DeepEqual(t, MultiStack(&singleFrameError{frame: frame}), &multi)
}