all: improve tests

dnsrewrite_test.go

@@ -16,6 +16,9 @@ func TestDNSResult_DNSRewrites(t *testing.T) {
 |disable_one^$dnsrewrite=127.0.0.2
 @@||disable_one^$dnsrewrite=127.0.0.1
 
+|simple_exc^$dnsrewrite=127.0.0.1
+@@||simple_exc^
+
 |disable_cname^$dnsrewrite=127.0.0.1
 |disable_cname^$dnsrewrite=new_cname
 @@||disable_cname^$dnsrewrite=new_cname
@@ -27,7 +30,7 @@ func TestDNSResult_DNSRewrites(t *testing.T) {
 
 |disable_all^$dnsrewrite=127.0.0.1
 |disable_all^$dnsrewrite=127.0.0.2
-@@||disable_all^$dnsrewrite=
+@@||disable_all^$dnsrewrite
 
 |disable_all_order^$dnsrewrite=127.0.0.1
 @@||disable_all_order^$dnsrewrite=
@@ -54,6 +57,23 @@ func TestDNSResult_DNSRewrites(t *testing.T) {
 		}
 	})
 
+	t.Run("simple_exc", func(t *testing.T) {
+		res, ok := dnsEngine.Match(path.Base(t.Name()))
+
+		// Simple matching.
+		assert.True(t, ok)
+		assert.True(t, res.NetworkRule.Whitelist)
+
+		// DNS rewrite matching.
+		dnsr := res.DNSRewrites()
+		if assert.Len(t, dnsr, 1) {
+			dr := dnsr[0].DNSRewrite
+			assert.Equal(t, dns.RcodeSuccess, dr.RCode)
+			assert.Equal(t, dns.TypeA, dr.RRType)
+			assert.Equal(t, ipv4p1, dr.Value)
+		}
+	})
+
 	t.Run("disable_cname", func(t *testing.T) {
 		res, ok := dnsEngine.Match(path.Base(t.Name()))
 		assert.False(t, ok)