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Extract host resolution from Dialer, add test
Resolves #1562 (comment)
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Ivan Mirić
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Jul 20, 2020
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,46 @@ | ||
package netext | ||
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import ( | ||
"net" | ||
"testing" | ||
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"github.com/stretchr/testify/assert" | ||
"github.com/stretchr/testify/require" | ||
"github.com/viki-org/dnscache" | ||
) | ||
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func TestDialerResolveHost(t *testing.T) { | ||
t.Parallel() | ||
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testCases := []struct { | ||
host string | ||
hosts map[string]net.IP | ||
ipVer int | ||
expErr string | ||
}{ | ||
{"1.2.3.4", nil, 4, ""}, | ||
{"256.1.1.1", nil, 4, "lookup 256.1.1.1: no such host"}, | ||
{"example.com", nil, 4, ""}, | ||
{"::1", nil, 6, ""}, | ||
{"::1.2.3.4", nil, 6, ""}, | ||
{"abcd:ef01:2345:6789", nil, 6, "lookup abcd:ef01:2345:6789: no such host"}, | ||
{"2001:db8:aaaa:1::100", nil, 6, ""}, | ||
{"ipv6.google.com", nil, 6, ""}, | ||
{"mycustomv4.host", map[string]net.IP{"mycustomv4.host": net.ParseIP("1.2.3.4")}, 4, ""}, | ||
{"mycustomv6.host", map[string]net.IP{"mycustomv6.host": net.ParseIP("::1")}, 6, ""}, | ||
} | ||
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resolver := dnscache.New(0) | ||
for _, tc := range testCases { | ||
tc := tc | ||
t.Run(tc.host, func(t *testing.T) { | ||
ip, err := resolveHost(tc.host, tc.hosts, resolver) | ||
if tc.expErr != "" { | ||
assert.EqualError(t, err, tc.expErr) | ||
return | ||
} | ||
require.NoError(t, err) | ||
assert.Equal(t, tc.ipVer == 6, ip.To4() == nil) | ||
}) | ||
} | ||
} |