middleware/erratic: add delaying queries (#614)

* middleware/erratic: add delying queries

* Dont println

middleware/erratic/setup_test.go

@@ -6,7 +6,7 @@ import (
 	"github.com/mholt/caddy"
 )
 
-func TestSetupWhoami(t *testing.T) {
+func TestSetupErratic(t *testing.T) {
 	c := caddy.NewTestController("dns", `erratic {
 		drop
 	}`)
@@ -26,3 +26,51 @@ func TestSetupWhoami(t *testing.T) {
 		t.Fatalf("Test 4, expected errors, but got: %q", err)
 	}
 }
+
+func TestParseErratic(t *testing.T) {
+	tests := []struct {
+		input     string
+		shouldErr bool
+		drop      uint64
+		delay     uint64
+	}{
+		// oks
+		{`erratic`, false, 2, 0},
+		{`erratic {
+			drop 2
+			delay 3 1ms
+
+		}`, false, 2, 3},
+		// fails
+		{`erratic {
+			drop -1
+		}`, true, 0, 0},
+		{`erraric {
+			drop 3
+			delay 3 bla
+		}`, true, 0, 0},
+	}
+	for i, test := range tests {
+		c := caddy.NewTestController("dns", test.input)
+		e, err := parseErratic(c)
+		if test.shouldErr && err == nil {
+			t.Errorf("Test %v: Expected error but found nil", i)
+			continue
+		} else if !test.shouldErr && err != nil {
+			t.Errorf("Test %v: Expected no error but found error: %v", i, err)
+			continue
+		}
+
+		if test.shouldErr {
+			continue
+		}
+
+		if test.delay != e.delay {
+			t.Errorf("Test %v: Expected delay %d but found: %d", i, test.delay, e.delay)
+		}
+
+		if test.drop != e.drop {
+			t.Errorf("Test %v: Expected drop %d but found: %d", i, test.drop, e.drop)
+		}
+	}
+}