Exclude fuzz testing from pre-1.18 toolchains

calendar_fuzz_test.go

@@ -0,0 +1,22 @@
+//go:build go1.18
+// +build go1.18
+
+package ics
+
+import (
+	"bytes"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func FuzzParseCalendar(f *testing.F) {
+	ics, err := os.ReadFile("testdata/timeparsing.ics")
+	require.NoError(f, err)
+	f.Add(ics)
+	f.Fuzz(func(t *testing.T, ics []byte) {
+		_, err := ParseCalendar(bytes.NewReader(ics))
+		t.Log(err)
+	})
+}

calendar_test.go

@@ -1,7 +1,7 @@
 package ics
 
 import (
-	"bytes"
+	"github.com/stretchr/testify/assert"
 	"io"
 	"io/ioutil"
 	"os"
@@ -11,9 +11,6 @@ import (
 	"testing"
 	"time"
 	"unicode/utf8"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 func TestTimeParsing(t *testing.T) {
@@ -363,13 +360,3 @@ func TestIssue52(t *testing.T) {
 		t.Fatalf("cannot read test directory: %v", err)
 	}
 }
-
-func FuzzParseCalendar(f *testing.F) {
-	ics, err := os.ReadFile("testdata/timeparsing.ics")
-	require.NoError(f, err)
-	f.Add(ics)
-	f.Fuzz(func(t *testing.T, ics []byte) {
-		_, err := ParseCalendar(bytes.NewReader(ics))
-		t.Log(err)
-	})
-}