test: make tests pass when the file descriptor limit is low.

Author: Stebalien

nofile_test.go

@@ -0,0 +1,23 @@
+// +build !windows,!wasm
+
+package dht
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"syscall"
+)
+
+func TestMain(m *testing.M) {
+	err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &syscall.Rlimit{
+		Cur: 4096,
+		Max: 4096,
+	})
+	if err != nil {
+		fmt.Println("failed to increase open file descriptor limit, can't run tests")
+		os.Exit(1)
+	}
+	os.Exit(m.Run())
+}