assert.IsType for nil pointers

main.go

package main

import (
	"fmt"
)

type Foo struct{}

func ReturnFoo() *Foo {
	return &Foo{}
}

func ReturnNil() *Foo {
	return nil
}

func main() {
	fmt.Println("Hello, playground")
}

main_test.go

package main

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestFoo(t *testing.T) {
	x := ReturnNil()
	assert.IsType(t, &Foo{}, x)
	y := ReturnFoo()
	assert.IsType(t, &Foo{}, y)
}