Fix failing go1.16 test

Fixes #132

go.mod

@@ -1,6 +1,7 @@
 module github.com/posener/complete/v2
 
 require (
+	bou.ke/monkey v1.0.2
 	github.com/hashicorp/go-multierror v1.0.0
 	github.com/posener/autogen v0.0.2
 	github.com/posener/script v1.1.5

go.sum

@@ -1,3 +1,5 @@
+bou.ke/monkey v1.0.2 h1:kWcnsrCNUatbxncxR/ThdYqbytgOIArtYWqcQLQzKLI=
+bou.ke/monkey v1.0.2/go.mod h1:OqickVX3tNx6t33n1xvtTtu85YN5s6cKwVug+oHMaIA=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=

gocomplete/complete.go

@@ -536,14 +536,14 @@ func main() {
 
 	modHelp := &complete.Command{
 		Sub: map[string]*complete.Command{
-			"download": &complete.Command{},
-			"edit":     &complete.Command{},
-			"graph":    &complete.Command{},
-			"init":     &complete.Command{},
-			"tidy":     &complete.Command{},
-			"vendor":   &complete.Command{},
-			"verify":   &complete.Command{},
-			"why":      &complete.Command{},
+			"download": {},
+			"edit":     {},
+			"graph":    {},
+			"init":     {},
+			"tidy":     {},
+			"vendor":   {},
+			"verify":   {},
+			"why":      {},
 		},
 	}
 
@@ -563,38 +563,38 @@ func main() {
 
 	help := &complete.Command{
 		Sub: map[string]*complete.Command{
-			"bug":         &complete.Command{},
-			"build":       &complete.Command{},
-			"clean":       &complete.Command{},
-			"doc":         &complete.Command{},
-			"env":         &complete.Command{},
-			"fix":         &complete.Command{},
-			"fmt":         &complete.Command{},
-			"generate":    &complete.Command{},
-			"get":         &complete.Command{},
-			"install":     &complete.Command{},
-			"list":        &complete.Command{},
+			"bug":         {},
+			"build":       {},
+			"clean":       {},
+			"doc":         {},
+			"env":         {},
+			"fix":         {},
+			"fmt":         {},
+			"generate":    {},
+			"get":         {},
+			"install":     {},
+			"list":        {},
 			"mod":         modHelp,
-			"run":         &complete.Command{},
-			"test":        &complete.Command{},
-			"tool":        &complete.Command{},
-			"version":     &complete.Command{},
-			"vet":         &complete.Command{},
-			"buildmode":   &complete.Command{},
-			"c":           &complete.Command{},
-			"cache":       &complete.Command{},
-			"environment": &complete.Command{},
-			"filetype":    &complete.Command{},
-			"go.mod":      &complete.Command{},
-			"gopath":      &complete.Command{},
-			"gopath-get":  &complete.Command{},
-			"goproxy":     &complete.Command{},
-			"importpath":  &complete.Command{},
-			"modules":     &complete.Command{},
-			"module-get":  &complete.Command{},
-			"packages":    &complete.Command{},
-			"testflag":    &complete.Command{},
-			"testfunc":    &complete.Command{},
+			"run":         {},
+			"test":        {},
+			"tool":        {},
+			"version":     {},
+			"vet":         {},
+			"buildmode":   {},
+			"c":           {},
+			"cache":       {},
+			"environment": {},
+			"filetype":    {},
+			"go.mod":      {},
+			"gopath":      {},
+			"gopath-get":  {},
+			"goproxy":     {},
+			"importpath":  {},
+			"modules":     {},
+			"module-get":  {},
+			"packages":    {},
+			"testflag":    {},
+			"testfunc":    {},
 		},
 	}
 

gocomplete/tests_test.go

@@ -5,6 +5,7 @@ import (
 	"sort"
 	"testing"
 
+	"bou.ke/monkey"
 	"github.com/posener/complete/v2"
 )
 
@@ -42,6 +43,7 @@ func TestPredictions(t *testing.T) {
 func BenchmarkFake(b *testing.B) {}
 
 func Example() {
+	monkey.Patch(os.Exit, func(int) {})
 	os.Setenv("COMP_LINE", "go ru")
 	os.Setenv("COMP_POINT", "5")
 	main()