plugin/transfer: Zone transfer plugin (#3223)

* transfer plugin

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

plugin/transfer/setup_test.go

@@ -0,0 +1,85 @@
+package transfer
+
+import (
+	"testing"
+
+	"github.com/caddyserver/caddy"
+)
+
+func TestParse(t *testing.T) {
+	tests := []struct {
+		input     string
+		shouldErr bool
+		exp       *Transfer
+	}{
+		{`transfer example.net example.org {
+			to 1.2.3.4 5.6.7.8:1053 [1::2]:34
+		 }
+         transfer example.com example.edu {
+            to * 1.2.3.4
+         }`,
+			false,
+			&Transfer{
+				xfrs: []*xfr{{
+					Zones: []string{"example.net.", "example.org."},
+					to:    []string{"1.2.3.4:53", "5.6.7.8:1053", "[1::2]:34"},
+				}, {
+					Zones: []string{"example.com.", "example.edu."},
+					to:    []string{"*", "1.2.3.4:53"},
+				}},
+			},
+		},
+		// errors
+		{`transfer example.net example.org {
+		 }`,
+			true,
+			nil,
+		},
+		{`transfer example.net example.org {
+           invalid option
+		 }`,
+			true,
+			nil,
+		},
+	}
+	for i, tc := range tests {
+		c := caddy.NewTestController("dns", tc.input)
+		transfer, err := parse(c)
+
+		if err == nil && tc.shouldErr {
+			t.Fatalf("Test %d expected errors, but got no error", i)
+		}
+		if err != nil && !tc.shouldErr {
+			t.Fatalf("Test %d expected no errors, but got '%v'", i, err)
+		}
+		if tc.shouldErr {
+			continue
+		}
+
+		if len(tc.exp.xfrs) != len(transfer.xfrs) {
+			t.Fatalf("Test %d expected %d xfrs, got %d", i, len(tc.exp.xfrs), len(transfer.xfrs))
+		}
+		for j, x := range transfer.xfrs {
+			// Check Zones
+			if len(tc.exp.xfrs[j].Zones) != len(x.Zones) {
+				t.Fatalf("Test %d expected %d zones, got %d", i, len(tc.exp.xfrs[i].Zones), len(x.Zones))
+			}
+			for k, zone := range x.Zones {
+				if tc.exp.xfrs[j].Zones[k] != zone {
+					t.Errorf("Test %d expected zone %v, got %v", i, tc.exp.xfrs[j].Zones[k], zone)
+
+				}
+			}
+			// Check to
+			if len(tc.exp.xfrs[j].to) != len(x.to) {
+				t.Fatalf("Test %d expected %d 'to' values, got %d", i, len(tc.exp.xfrs[i].to), len(x.to))
+			}
+			for k, to := range x.to {
+				if tc.exp.xfrs[j].to[k] != to {
+					t.Errorf("Test %d expected %v in 'to', got %v", i, tc.exp.xfrs[j].to[k], to)
+
+				}
+			}
+		}
+	}
+}