init

net/packet/packet_test.go

@@ -0,0 +1,62 @@
+package packet
+
+import (
+	"bytes"
+	"testing"
+)
+
+var VarInts = []VarInt{0, 1, 2, 127, 128, 255, 2147483647, -1, -2147483648}
+
+var PackedVarInts = [][]byte{
+	[]byte{0x00},
+	[]byte{0x01},
+	[]byte{0x02},
+	[]byte{0x7f},
+	[]byte{0x80, 0x01},
+	[]byte{0xff, 0x01},
+	[]byte{0xff, 0xff, 0xff, 0xff, 0x07},
+	[]byte{0xff, 0xff, 0xff, 0xff, 0x0f},
+	[]byte{0x80, 0x80, 0x80, 0x80, 0x08},
+}
+
+func TestPackInt(t *testing.T) {
+	for i, v := range VarInts {
+		p := v.Encode()
+		if !bytes.Equal(p, PackedVarInts[i]) {
+			t.Errorf("pack int %d should be \"% x\", get \"% x\"", v, PackedVarInts[i], p)
+		}
+	}
+}
+func TestUnpackInt(t *testing.T) {
+	for i, v := range PackedVarInts {
+		var vi VarInt
+		if err := vi.Decode(bytes.NewReader(v)); err != nil {
+			t.Errorf("unpack \"% x\" error: %v", v, err)
+		}
+		if vi != VarInts[i] {
+			t.Errorf("unpack \"% x\" should be %d, get %d", v, VarInts[i], vi)
+		}
+	}
+}
+
+func TestPositionPack(t *testing.T) {
+	// x (-33554432 to 33554431), y (-2048 to 2047), z (-33554432 to 33554431)
+
+	for x := -33554432; x < 33554432; x += 55443 {
+		for y := -2048; y < 2048; y += 48 {
+			for z := -33554432; z < 33554432; z += 55443 {
+				var (
+					pos1 Position
+					pos2 = Position{x, y, z}
+				)
+				if err := pos1.Decode(bytes.NewReader(pos2.Encode())); err != nil {
+					t.Errorf("Position decode fail: %v", err)
+				}
+
+				if pos1 != pos2 {
+					t.Errorf("cannot pack %v", pos2)
+				}
+			}
+		}
+	}
+}