panic_test.go

package marshalkit_test

import (
	"errors"

	. "github.com/dogmatiq/marshalkit"
	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"
)

var _ = Describe("func Recover()", func() {
	It("recoveres from marshaling related panics", func() {
		var err error

		func() {
			defer Recover(&err)
			panic(PanicSentinel{errors.New("<error>")})
		}()

		Expect(err).To(MatchError("<error>"))
	})

	It("does not recover from unrelated panics", func() {
		var value any

		func() {
			defer func() {
				value = recover()
			}()

			func() (err error) {
				defer Recover(&err)
				panic("<value>") // not a MustPanicSentinel
			}()
		}()

		Expect(value).To(Equal("<value>"))
	})

	It("does not panic when no panic occurs", func() {
		err := func() (err error) {
			defer Recover(&err)
			return nil
		}()

		Expect(err).ShouldNot(HaveOccurred())
	})

	It("panics when passed a nil pointer", func() {
		Expect(func() {
			Recover(nil)
		}).To(Panic())
	})
})