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container/stub: override goexit methods
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Browse Source 
FailNow, Fatal, Fatalf, SkipNow, Skip and Skipf must be called from the goroutine created by the test.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra 2025-09-04 04:51:49 +09:00
parent ddfb865e2d
commit 4051577d6b
Signed by: cat
SSH Key Fingerprint: SHA256:gQ67O0enBZ7UdZypgtspB2FDM1g3GVw8nX0XSdcFw8Q
6 changed files with 157 additions and 49 deletions
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4
container/dispatcher_test.go
View File

@ -148,8 +148,8 @@ func checkSimple(t *testing.T, fname string, testCases []simpleTestCase) {
t.Run(tc.name, func(t *testing.T) {
t.Helper()
defer stub.HandleExit()
k := &kstub{stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{s} }, tc.want)}
defer k.HandleExit()
if err := tc.f(k); !reflect.DeepEqual(err, tc.wantErr) {
t.Errorf("%s: error = %v, want %v", fname, err, tc.wantErr)
}
@ -184,12 +184,12 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
t.Run(tc.name, func(t *testing.T) {
t.Helper()
defer stub.HandleExit()
state := &setupState{Params: tc.params}
k := &kstub{stub.New(t,
func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{s} },
stub.Expect{Calls: slices.Concat(tc.early, []stub.Call{{Name: stub.CallSeparator}}, tc.apply)},
)}
defer k.HandleExit()
errEarly := tc.op.early(state, k)
k.Expects(stub.CallSeparator)
if !reflect.DeepEqual(errEarly, tc.wantErrEarly) {

31
container/stub/exit.go
View File

@ -1,15 +1,36 @@
package stub
import "testing"
// PanicExit is a magic panic value treated as a simulated exit.
const PanicExit = 0xdeadbeef
const (
panicFailNow = 0xcafe0000 + iota
panicFatal
panicFatalf
)
// HandleExit must be deferred before calling with the stub.
func HandleExit() {
r := recover()
if r == PanicExit {
return
func (s *Stub[K]) HandleExit() { handleExit(s.TB, true) }
func handleExit(t testing.TB, root bool) {
switch r := recover(); r {
case PanicExit:
break
case panicFailNow:
if root {
t.FailNow()
} else {
t.Fail()
}
if r != nil {
break
case panicFatal, panicFatalf, nil:
break
default:
panic(r)
}
}

55
container/stub/exit_test.go
View File

@ -2,18 +2,67 @@ package stub_test
import (
"testing"
_ "unsafe"
"hakurei.app/container/stub"
)
//go:linkname handleExit hakurei.app/container/stub.handleExit
func handleExit(_ testing.TB, _ bool)
// overrideTFailNow overrides the Fail and FailNow method.
type overrideTFailNow struct {
*testing.T
failNow bool
fail bool
}
func (o *overrideTFailNow) FailNow() {
if o.failNow {
o.Errorf("attempted to FailNow twice")
}
o.failNow = true
}
func (o *overrideTFailNow) Fail() {
if o.fail {
o.Errorf("attempted to Fail twice")
}
o.fail = true
}
func TestHandleExit(t *testing.T) {
t.Run("exit", func(t *testing.T) {
defer stub.HandleExit()
defer handleExit(t, true)
panic(stub.PanicExit)
})
t.Run("goexit", func(t *testing.T) {
t.Run("FailNow", func(t *testing.T) {
ot := &overrideTFailNow{T: t}
defer func() {
if !ot.failNow {
t.Errorf("FailNow was never called")
}
}()
defer handleExit(ot, true)
panic(0xcafe0000)
})
t.Run("Fail", func(t *testing.T) {
ot := &overrideTFailNow{T: t}
defer func() {
if !ot.fail {
t.Errorf("Fail was never called")
}
}()
defer handleExit(ot, false)
panic(0xcafe0000)
})
})
t.Run("nil", func(t *testing.T) {
defer stub.HandleExit()
defer handleExit(t, true)
})
t.Run("passthrough", func(t *testing.T) {
@ -24,7 +73,7 @@ func TestHandleExit(t *testing.T) {
}
}()
defer stub.HandleExit()
defer handleExit(t, true)
panic(0xcafebabe)
})
}

9
container/stub/stub.go
View File

@ -45,6 +45,13 @@ func New[K any](tb testing.TB, makeK func(s *Stub[K]) K, want Expect) *Stub[K] {
return &Stub[K]{TB: tb, makeK: makeK, want: want, wg: new(sync.WaitGroup)}
}
func (s *Stub[K]) FailNow() { panic(panicFailNow) }
func (s *Stub[K]) Fatal(args ...any) { s.Error(args...); panic(panicFatal) }
func (s *Stub[K]) Fatalf(format string, args ...any) { s.Errorf(format, args...); panic(panicFatalf) }
func (s *Stub[K]) SkipNow() { panic("invalid call to SkipNow") }
func (s *Stub[K]) Skip(...any) { panic("invalid call to Skip") }
func (s *Stub[K]) Skipf(string, ...any) { panic("invalid call to Skipf") }
// New calls f in a new goroutine
func (s *Stub[K]) New(f func(k K)) {
s.Helper()
@ -61,7 +68,7 @@ func (s *Stub[K]) New(f func(k K)) {
s.Helper()
defer s.wg.Done()
defer HandleExit()
defer handleExit(s.TB, false)
f(s.makeK(ds))
}()
}

101
container/stub/stub_test.go
View File

@ -13,29 +13,19 @@ type stubHolder struct{ *Stub[stubHolder] }
type overrideT struct {
*testing.T
fatal atomic.Pointer[func(args ...any)]
fatalf atomic.Pointer[func(format string, args ...any)]
error atomic.Pointer[func(args ...any)]
errorf atomic.Pointer[func(format string, args ...any)]
}
func (t *overrideT) Fatal(args ...any) {
fp := t.fatal.Load()
func (t *overrideT) Error(args ...any) {
fp := t.error.Load()
if fp == nil || *fp == nil {
t.T.Fatal(args...)
t.T.Error(args...)
return
}
(*fp)(args...)
}
func (t *overrideT) Fatalf(format string, args ...any) {
fp := t.fatalf.Load()
if fp == nil || *fp == nil {
t.T.Fatalf(format, args...)
return
}
(*fp)(format, args...)
}
func (t *overrideT) Errorf(format string, args ...any) {
fp := t.errorf.Load()
if fp == nil || *fp == nil {
@ -46,6 +36,47 @@ func (t *overrideT) Errorf(format string, args ...any) {
}
func TestStub(t *testing.T) {
t.Run("goexit", func(t *testing.T) {
t.Run("FailNow", func(t *testing.T) {
defer func() {
if r := recover(); r != panicFailNow {
t.Errorf("recover: %v", r)
}
}()
new(stubHolder).FailNow()
})
t.Run("SkipNow", func(t *testing.T) {
defer func() {
want := "invalid call to SkipNow"
if r := recover(); r != want {
t.Errorf("recover: %v, want %v", r, want)
}
}()
new(stubHolder).SkipNow()
})
t.Run("Skip", func(t *testing.T) {
defer func() {
want := "invalid call to Skip"
if r := recover(); r != want {
t.Errorf("recover: %v, want %v", r, want)
}
}()
new(stubHolder).Skip()
})
t.Run("Skipf", func(t *testing.T) {
defer func() {
want := "invalid call to Skipf"
if r := recover(); r != want {
t.Errorf("recover: %v, want %v", r, want)
}
}()
new(stubHolder).Skipf("")
})
})
t.Run("new", func(t *testing.T) {
t.Run("success", func(t *testing.T) {
s := New(t, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{Calls: []Call{
@ -82,12 +113,12 @@ func TestStub(t *testing.T) {
t.Run("overrun", func(t *testing.T) {
ot := &overrideT{T: t}
ot.fatal.Store(checkFatal(t, "New: track overrun"))
ot.error.Store(checkError(t, "New: track overrun"))
s := New(ot, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{Calls: []Call{
{"New", ExpectArgs{}, nil, nil},
{"panic", ExpectArgs{"unreachable"}, nil, nil},
}})
func() { defer HandleExit(); s.New(func(k stubHolder) { panic("unreachable") }) }()
func() { defer s.HandleExit(); s.New(func(k stubHolder) { panic("unreachable") }) }()
var visit int
s.VisitIncomplete(func(s *Stub[stubHolder]) {
@ -106,38 +137,38 @@ func TestStub(t *testing.T) {
t.Run("expects", func(t *testing.T) {
t.Run("overrun", func(t *testing.T) {
ot := &overrideT{T: t}
ot.fatal.Store(checkFatal(t, "Expects: advancing beyond expected calls"))
ot.error.Store(checkError(t, "Expects: advancing beyond expected calls"))
s := New(ot, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{})
func() { defer HandleExit(); s.Expects("unreachable") }()
func() { defer s.HandleExit(); s.Expects("unreachable") }()
})
t.Run("separator", func(t *testing.T) {
t.Run("overrun", func(t *testing.T) {
ot := &overrideT{T: t}
ot.fatalf.Store(checkFatalf(t, "Expects: func = %s, separator overrun", "meow"))
ot.errorf.Store(checkErrorf(t, "Expects: func = %s, separator overrun", "meow"))
s := New(ot, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{Calls: []Call{
{CallSeparator, ExpectArgs{}, nil, nil},
}})
func() { defer HandleExit(); s.Expects("meow") }()
func() { defer s.HandleExit(); s.Expects("meow") }()
})
t.Run("mismatch", func(t *testing.T) {
ot := &overrideT{T: t}
ot.fatalf.Store(checkFatalf(t, "Expects: separator, want %s", "panic"))
ot.errorf.Store(checkErrorf(t, "Expects: separator, want %s", "panic"))
s := New(ot, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{Calls: []Call{
{"panic", ExpectArgs{}, nil, nil},
}})
func() { defer HandleExit(); s.Expects(CallSeparator) }()
func() { defer s.HandleExit(); s.Expects(CallSeparator) }()
})
})
t.Run("mismatch", func(t *testing.T) {
ot := &overrideT{T: t}
ot.fatalf.Store(checkFatalf(t, "Expects: func = %s, want %s", "meow", "nya"))
ot.errorf.Store(checkErrorf(t, "Expects: func = %s, want %s", "meow", "nya"))
s := New(ot, func(s *Stub[stubHolder]) stubHolder { return stubHolder{s} }, Expect{Calls: []Call{
{"nya", ExpectArgs{}, nil, nil},
}})
func() { defer HandleExit(); s.Expects("meow") }()
func() { defer s.HandleExit(); s.Expects("meow") }()
})
})
})
@ -167,9 +198,9 @@ func TestCheckArg(t *testing.T) {
}
})
t.Run("mismatch", func(t *testing.T) {
defer HandleExit()
defer s.HandleExit()
s.Expects("meow")
ot.errorf.Store(checkFatalf(t, "%s: %s = %#v, want %#v (%d)", "meow", "time", 0, -1, 1))
ot.errorf.Store(checkErrorf(t, "%s: %s = %#v, want %#v (%d)", "meow", "time", 0, -1, 1))
if CheckArg(s, "time", 0, 0) {
t.Errorf("CheckArg: unexpected true")
}
@ -210,9 +241,9 @@ func TestCheckArgReflect(t *testing.T) {
}
})
t.Run("mismatch", func(t *testing.T) {
defer HandleExit()
defer s.HandleExit()
s.Expects("meow")
ot.errorf.Store(checkFatalf(t, "%s: %s = %#v, want %#v (%d)", "meow", "time", 0, -1, 1))
ot.errorf.Store(checkErrorf(t, "%s: %s = %#v, want %#v (%d)", "meow", "time", 0, -1, 1))
if CheckArgReflect(s, "time", 0, 0) {
t.Errorf("CheckArgReflect: unexpected true")
}
@ -229,35 +260,35 @@ func TestCheckArgReflect(t *testing.T) {
})
}
func checkFatal(t *testing.T, wantArgs ...any) *func(args ...any) {
func checkError(t *testing.T, wantArgs ...any) *func(args ...any) {
var called bool
f := func(args ...any) {
if called {
panic("invalid call to fatal")
panic("invalid call to error")
}
called = true
if !reflect.DeepEqual(args, wantArgs) {
t.Errorf("Fatal: %#v, want %#v", args, wantArgs)
t.Errorf("Error: %#v, want %#v", args, wantArgs)
}
panic(PanicExit)
}
return &f
}
func checkFatalf(t *testing.T, wantFormat string, wantArgs ...any) *func(format string, args ...any) {
func checkErrorf(t *testing.T, wantFormat string, wantArgs ...any) *func(format string, args ...any) {
var called bool
f := func(format string, args ...any) {
if called {
panic("invalid call to fatalf")
panic("invalid call to errorf")
}
called = true
if format != wantFormat {
t.Errorf("Fatalf: format = %q, want %q", format, wantFormat)
t.Errorf("Errorf: format = %q, want %q", format, wantFormat)
}
if !reflect.DeepEqual(args, wantArgs) {
t.Errorf("Fatalf: args = %#v, want %#v", args, wantArgs)
t.Errorf("Errorf: args = %#v, want %#v", args, wantArgs)
}
panic(PanicExit)
}

4
system/dispatcher_test.go
View File

@ -43,8 +43,8 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
ec = (*Criteria)(&tc.ec)
}
defer stub.HandleExit()
sys, s := InternalNew(t, stub.Expect{Calls: slices.Concat(tc.apply, []stub.Call{{Name: stub.CallSeparator}}, tc.revert)}, tc.uid)
defer s.HandleExit()
errApply := tc.op.apply(sys)
s.Expects(stub.CallSeparator)
if !reflect.DeepEqual(errApply, tc.wantErrApply) {
@ -90,8 +90,8 @@ func checkOpsBuilder(t *testing.T, fname string, testCases []opsBuilderTestCase)
t.Run(tc.name, func(t *testing.T) {
t.Helper()
defer stub.HandleExit()
sys, s := InternalNew(t, tc.exp, tc.uid)
defer s.HandleExit()
tc.f(sys)
s.VisitIncomplete(func(s *stub.Stub[syscallDispatcher]) {
t.Helper()