func main() {
	flag.Parse()
	switch *modeflag {
	case "simple":
		testSimple()
	case "goodexit":
		testGoodExit()
	case "badexit":
		testBadExit()
	case "panics":
		testPanics()
	case "callsexit":
		testHookCallsExit()
	case "exit2":
		testExit2()
	default:
		panic("unknown mode")
	}
}

func testSimple() {
	f1 := func() { println("foo") }

				expected: "orange apple",
			},
			{
				mode:     "badexit",
				expected: "blub blix",
			},
			{
				mode: "panics",
				musthave: []string{
					"fatal error: exit hook invoked panic",
					"main.testPanics",
				},
			},
			{
				mode: "callsexit",
				musthave: []string{
					"fatal error: exit hook invoked exit",
				},
			},
			{
				mode:     "exit2",
				expected: "",
			},
		}

	msg any
}

func (p panicTextAndJsonMarshaler) MarshalText() ([]byte, error) {
	panic(p.msg)
}

func (p panicTextAndJsonMarshaler) MarshalJSON() ([]byte, error) {
	panic(p.msg)
}

func TestPanics(t *testing.T) {
	// Revert any changes to the default logger. This is important because other
	// tests might change the default logger using SetDefault. Also ensure we
	// restore the default logger at the end of the test.

	{"%s", (*PanicF)(nil), "<nil>"}, // nil pointer special case
	{"%s", PanicF{io.ErrUnexpectedEOF}, "%!s(PANIC=Format method: unexpected EOF)"},
	{"%s", PanicF{3}, "%!s(PANIC=Format method: 3)"},
}

func TestPanics(t *testing.T) {
	for i, tt := range panictests {
		s := Sprintf(tt.fmt, tt.in)
		if s != tt.out {
			t.Errorf("%d: %q: got %q expected %q", i, tt.fmt, s, tt.out)
		}
	}
}

# Test functions that panic should never be marked as passing
# (https://golang.org/issue/40132).

! go test -json ./testpanic
stdout '"Action":"fail"'
! stdout '"Action":"pass"'

! go tool test2json ./testpanic.exe -test.v
stdout '"Action":"fail"'
! stdout '"Action":"pass"'

! go tool test2json ./testpanic.exe
stdout '"Action":"fail"'
! stdout '"Action":"pass"'

{"Action":"start"}
{"Action":"output","Test":"TestPanic","Output":"--- FAIL: TestPanic (0.00s)\n"}
{"Action":"output","Test":"TestPanic","Output":"panic: oops [recovered]\n"}
{"Action":"output","Test":"TestPanic","Output":"\tpanic: oops\n"}
{"Action":"output","Test":"TestPanic","Output":"\n"}
{"Action":"output","Test":"TestPanic","Output":"goroutine 7 [running]:\n"}
{"Action":"output","Test":"TestPanic","Output":"testing.tRunner.func1(0xc000092100)\n"}

--- FAIL: TestPanic (0.00s)
panic: oops [recovered]
	panic: oops

goroutine 7 [running]:
testing.tRunner.func1(0xc000092100)
	/go/src/testing/testing.go:874 +0x3a3
panic(0x1110ea0, 0x116aea0)
	/go/src/runtime/panic.go:679 +0x1b2
command-line-arguments.TestPanic(0xc000092100)
	a_test.go:6 +0x39
testing.tRunner(0xc000092100, 0x114f500)
	go/src/testing/testing.go:909 +0xc9
created by testing.(*T).Run
	go/src/testing/testing.go:960 +0x350

		nilch <- 7
	})
	testBlock(always, func() {
		<-nilch
	})

	// sending/receiving from a nil channel inside a select is never selected
	testPanic(never, func() {
		select {
		case nilch <- 7:
			unreachable()
		default:
		}
	})
	testPanic(never, func() {
		select {
		case <-nilch:
			unreachable()
		default:
		}
	})

	// sending to an async channel with free buffer space never blocks

}

// Hack to run tests in a playground
func matchString(a, b string) (bool, error) {
	return a == b, nil
}
func main() {
	testSuite := []testing.InternalTest{
		{
			Name: "TestPanic",
			F:    TestPanic,
		},
	}
	testing.Main(matchString, testSuite, nil, nil)

)

var testPanicTest = flag.String("test_panic_test", "", "TestPanic: indicates which test should panic")
var testPanicParallel = flag.Bool("test_panic_parallel", false, "TestPanic: run subtests in parallel")
var testPanicCleanup = flag.Bool("test_panic_cleanup", false, "TestPanic: indicates whether test should call Cleanup")
var testPanicCleanupPanic = flag.String("test_panic_cleanup_panic", "", "TestPanic: indicate whether test should call Cleanup function that panics")