1 files changed, 68 insertions, 0 deletions
diff --git a/src/pkg/net/hosts_test.go b/src/pkg/net/hosts_test.go
new file mode 100644
index 000000000..1bd00541c
--- /dev/null
+++ b/src/pkg/net/hosts_test.go
@@ -0,0 +1,68 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+	"sort"
+	"testing"
+)
+
+type hostTest struct {
+	host string
+	ips  []IP
+}
+
+var hosttests = []hostTest{
+	{"odin", []IP{
+		IPv4(127, 0, 0, 2),
+		IPv4(127, 0, 0, 3),
+		ParseIP("::2"),
+	}},
+	{"thor", []IP{
+		IPv4(127, 1, 1, 1),
+	}},
+	{"loki", []IP{}},
+	{"ullr", []IP{
+		IPv4(127, 1, 1, 2),
+	}},
+	{"ullrhost", []IP{
+		IPv4(127, 1, 1, 2),
+	}},
+}
+
+func TestLookupStaticHost(t *testing.T) {
+	p := hostsPath
+	hostsPath = "hosts_testdata"
+	for i := 0; i < len(hosttests); i++ {
+		tt := hosttests[i]
+		ips := lookupStaticHost(tt.host)
+		if len(ips) != len(tt.ips) {
+			t.Errorf("# of hosts = %v; want %v",
+				len(ips), len(tt.ips))
+			return
+		}
+		for k, v := range ips {
+			if tt.ips[k].String() != v {
+				t.Errorf("lookupStaticHost(%q) = %v; want %v",
+					tt.host, v, tt.ips[k])
+			}
+		}
+	}
+	hostsPath = p
+}
+
+func TestLookupHost(t *testing.T) {
+	// Can't depend on this to return anything in particular,
+	// but if it does return something, make sure it doesn't
+	// duplicate addresses (a common bug due to the way
+	// getaddrinfo works).
+	addrs, _ := LookupHost("localhost")
+	sort.Strings(addrs)
+	for i := 0; i+1 < len(addrs); i++ {
+		if addrs[i] == addrs[i+1] {
+			t.Fatalf("LookupHost(\"localhost\") = %v, has duplicate addresses", addrs)
+		}
+	}
+}