Port and tune 26.3 wood farming

mosfet/bot.py

@@ -417,6 +417,7 @@ def start_automation(global_state, initialize=True):
         g.break_time = 0.0
         g.item_lock = False
         g.minimum_cache_slots = g.get('minimum_cache_slots', 27)
+        g.maximum_supply_slots = g.get('maximum_supply_slots', 33)
         g.draining = False
         g.dumping = None
         g.dump_waiting = None
@@ -461,6 +462,7 @@ def start_automation(global_state, initialize=True):
     g.setdefault('drain_error', None)
     g.setdefault('item_lock', False)
     g.setdefault('minimum_cache_slots', 27)
+    g.setdefault('maximum_supply_slots', 33)
     g.setdefault('holding_slot', 0)
     g.setdefault('holding_hand', 0)
     g.setdefault('time', 0.0)

mosfet/commands.py

@@ -71,7 +71,9 @@ class Commands:
         }
         if ((command == 'gather' and data.lower().strip() != 'wood') or
                 command in unsupported or
-                (command == 'farm' and not data.lower().startswith('crop'))):
+                (command == 'farm' and
+                 not data.lower().startswith('crop') and
+                 data.lower().strip() != 'wood')):
             reply = 'not migrated to Minecraft 26.3 yet'
             print('Reply:', reply)
             self._send_reply(reply, private, reply_target)

mosfet/game.py

@@ -2,6 +2,7 @@ import re
 import time
 import random
 from itertools import count
+from math import floor, isfinite
 from munch import Munch
 
 from minecraft.networking.packets import Packet, clientbound, serverbound
@@ -721,15 +722,41 @@ class Game(LegacyGame):
         block_id = self.g.chunks.get_block_at(*location)
         if block_id is None or block_id == blocks.AIR:
             return False
+
+        holding = self.g.get('holding', 0)
+        held_slot = (45 if self.g.get('holding_hand', 0) == 1 else
+                     36 + int(self.g.get('holding_slot', 0) or 0))
+        held_stack = self.g.get('inv', {}).get(held_slot)
+        enchantments = (getattr(held_stack, 'components', {}) or {}).get(
+            'enchantments', {})
+        in_water = False
+        on_ground = True
+        position = self.g.get('pos')
+        chunks = self.g.get('chunks')
+        if position is not None and chunks is not None:
+            x, y, z = (floor(position.x), floor(position.y),
+                       floor(position.z))
+            support = chunks.get_block_at(x, floor(position.y - 0.2), z)
+            if support is not None:
+                on_ground = support not in blocks.NON_SOLID_IDS
+            feet = chunks.get_block_at(x, y, z)
+            eyes = chunks.get_block_at(x, floor(position.y + 1.62), z)
+            in_water = feet in blocks.WATER_IDS or eyes in blocks.WATER_IDS
+
+        duration = utils.break_time(
+            block_id, holding, in_water=in_water, on_ground=on_ground,
+            enchantments=enchantments, effects=self.g.get('effects', {}))
+        if not isfinite(duration):
+            return False
+
         packet = PlayerActionPacket(
             action=0, location=location, face=1,
             sequence=self._next_sequence())
         self._send_action(packet)
         self.g.breaking = location
         self.breaking_state = block_id
-        hardness_time = utils.break_time(block_id, self.g.get('holding', 0))
         now = time.monotonic()
-        self.break_deadline = now + max(0.05, hardness_time)
+        self.break_deadline = now + duration
         self.animate()
         self.next_swing_at = now + self.ARM_SWING_INTERVAL
         return True

mosfet/info/items.py

@@ -55,6 +55,15 @@ def get_id(name):
     return ITEMS['minecraft:' + name]['protocol_id']
 
 
+def get_sapling_id(tree_type):
+    """Return the plantable sapling/propagule item for a tree species."""
+    for suffix in ('_sapling', '_propagule'):
+        item = ITEMS.get('minecraft:' + tree_type + suffix)
+        if item is not None:
+            return item['protocol_id']
+    return None
+
+
 def get_name(idx):
     return ITEM_NAMES[idx]
 

mosfet/job.py

@@ -270,6 +270,11 @@ class JobStates(LegacyJobStates):
         self.g = global_state
         self.gather_wood_states = gather_wood.GatherWoodStates(global_state)
         self.gather_crop_states = gather_crop.GatherCropStates(global_state)
+        self.grab_supplies_states = grab_supplies.GrabSuppliesStates(
+            global_state)
+        self.clear_leaves_states = clear_leaves.ClearLeavesStates(global_state)
+        self.plant_tree_states = plant_tree.PlantTreeStates(global_state)
+        self.grab_sapling_states = grab_sapling.GrabSaplingStates(global_state)
         self.cache_items_states = cache_items.CacheItemsStates(global_state)
         self.sleep_with_bed_states = sleep_with_bed.SleepWithBedStates(
             global_state)
@@ -278,6 +283,25 @@ class JobStates(LegacyJobStates):
             global_state)
         self.state = self.idle
 
+    def farm_wood(self):
+        self.sleep_with_bed_states.silent = True
+        self.cache_items_states.silent = True
+        self.grab_supplies_states.supplies = {
+            tuple(items.AXE_IDS): (1, 9),
+        }
+        items.set_needed(items.AXE_IDS)
+        items.set_wanted(items.SAPLING_IDS)
+        return [
+            self.grab_supplies_states,
+            self.gather_wood_states,
+            self.clear_leaves_states,
+            self.plant_tree_states,
+            self.grab_sapling_states,
+            self.sleep_with_bed_states,
+            self.eat_food_states,
+            self.cache_items_states,
+        ]
+
     def farm_crop(self):
         self.cache_items_states.silent = True
         self.sleep_with_bed_states.silent = True
@@ -314,6 +338,10 @@ class JobStates(LegacyJobStates):
             self.g.game.leave_bed()
         self.gather_wood_states.state = self.gather_wood_states.idle
         self.gather_crop_states.state = self.gather_crop_states.idle
+        self.grab_supplies_states.state = self.grab_supplies_states.idle
+        self.clear_leaves_states.state = self.clear_leaves_states.idle
+        self.plant_tree_states.state = self.plant_tree_states.idle
+        self.grab_sapling_states.state = self.grab_sapling_states.idle
         self.cache_items_states.state = self.cache_items_states.idle
         self.sleep_with_bed_states.state = self.sleep_with_bed_states.idle
         self.sleep_with_bed_states.force_new_bed = False

mosfet/jobs/clear_leaves.py

@@ -17,6 +17,8 @@ from mosfet.info import mcdata
 from mosfet.info import mobs
 
 class ClearLeavesStates:
+    LEAF_BREAK_INTERVAL = 0.6
+
     def idle(self):
         return None
 
@@ -26,9 +28,13 @@ class ClearLeavesStates:
             self.state = self.cleanup
             return
 
-        sapling_type = self.g.chopped_tree + '_sapling'
+        sapling_item = items.get_sapling_id(self.g.chopped_tree)
-        sapling_item = items.get_id(sapling_type)
+        if sapling_item is None:
+            print('No sapling for chopped tree, skipping leaf cleanup')
+            self.state = self.cleanup
+            return
         num_saplings = self.g.game.count_items([sapling_item])
+        sapling_type = items.get_name(sapling_item)
         print('Have', num_saplings, sapling_type, 'in inventory')
 
         if num_saplings > 8:
@@ -57,9 +63,13 @@ class ClearLeavesStates:
     def break_leaves(self):
         if not self.g.breaking:
             if self.leaves:
+                now = time.monotonic()
+                if now < self.next_break_at:
+                    return
                 leaf = self.leaves.pop(0)
                 self.g.look_at = leaf
-                self.g.game.break_block(leaf)
+                if self.g.game.break_block(leaf):
+                    self.next_break_at = now + self.LEAF_BREAK_INTERVAL
                 print('Breaking leaf', leaf)
             else:
                 self.wait_time = 1
@@ -86,6 +96,7 @@ class ClearLeavesStates:
 
         self.leaves = []
         self.wait_time = 0
+        self.next_break_at = 0.0
 
     def run(self):
         self.state()

mosfet/jobs/gather_wood.py

@@ -32,7 +32,13 @@ class GatherWoodStates:
 
         for tree in w.find_trees(p, 100):
             print('Found tree:', tree)
-            if tree not in self.bad_trees:
+            if tree in self.bad_trees:
+                continue
+            tree_type = blocks.BLOCKS[w.block_at(*tree)].replace('_log', '')
+            if items.get_sapling_id(tree_type) is None:
+                print('No plantable sapling for', tree_type, '- skipping')
+                self.bad_trees.append(tree)
+                continue
             break
         else: # for
             print('No good trees left, aborting.')
@@ -40,7 +46,7 @@ class GatherWoodStates:
             return
 
         self.tree = tree
-        self.type = blocks.BLOCKS[w.block_at(*tree)].replace('_log', '')
+        self.type = tree_type
         print('Type:', self.type)
 
         self.state = self.find_openings

mosfet/jobs/grab_supplies.py

@@ -13,7 +13,6 @@ from mosfet import utils
 from mosfet import path
 from mosfet.info import blocks
 from mosfet.info import items
-from mosfet.info import mcdata
 from mosfet.info import mobs
 
 class GrabSuppliesStates:
@@ -160,8 +159,8 @@ class GrabSuppliesStates:
             print('Didnt get a window, aborting')
             self.state = self.cleanup
             return
-        if w.data.window_type != mcdata.SINGLE_CHEST:
+        if w.get('container_slots', 0) != 27:
-            print('Got wrong window, aborting')
+            print('Got wrong container size, aborting')
             self.state = self.cleanup
             return
         used_slots = self.g.game.count_inventory_slots()
@@ -173,10 +172,7 @@ class GrabSuppliesStates:
             self.state = self.cleanup
             return
 
-        w_info = mcdata.WINDOWS[w.data.window_type]
+        for slot_num in range(w.container_slots):
-        w_container_slots = w_info.container
-
-        for slot_num in w_container_slots:
             if slot_num not in w.contents:
                 continue
 

mosfet/jobs/plant_tree.py

@@ -39,10 +39,14 @@ class PlantTreeStates:
 
     def select_sapling(self):
         p = utils.pint(self.g.pos)
-        sapling_type = self.g.chopped_tree + '_sapling'
+        sapling_item = items.get_sapling_id(self.g.chopped_tree)
-        sapling_item = items.get_id(sapling_type)
+        if sapling_item is None:
+            print('Aborting planting, no sapling for', self.g.chopped_tree)
+            self.state = self.cleanup
+            return
 
         if self.g.game.select_item([sapling_item]):
+            sapling_type = items.get_name(sapling_item)
             self.g.look_at = utils.padd(p, path.BLOCK_BELOW)
             self.state = self.wait_select
             self.wait_time = 1

mosfet/protocol/managers.py

@@ -5,7 +5,7 @@ from munch import Munch
 from minecraft.networking.packets import clientbound, serverbound
 from minecraft.networking.modern import (
     AddEntityPacket, ContainerOpenPacket, ContainerSetContentPacket,
-    ContainerSetSlotPacket,
+    ContainerSetSlotPacket, SetEntityDataPacket,
     PaletteSection,
     EntityPositionSyncPacket, MoveEntityPositionPacket,
     MoveEntityPositionRotationPacket, MoveEntityRotationPacket,
@@ -347,6 +347,7 @@ class EntityManager:
         register = self.g.connection.register_packet_listener
         for packet_type, handler in (
             (AddEntityPacket, self.handle_add_entity),
+            (SetEntityDataPacket, self.handle_entity_data),
             (RemoveEntitiesPacket, self.handle_remove_entities),
             (MoveEntityPositionPacket, self.handle_move),
             (MoveEntityPositionRotationPacket, self.handle_move),
@@ -378,6 +379,14 @@ class EntityManager:
                 type=packet.entity_type_id, yaw=packet.yaw,
                 pitch=packet.pitch)
 
+    def handle_entity_data(self, packet):
+        obj = self.g.objects.get(packet.entity_id)
+        if obj is None or not packet.item_stacks:
+            return
+        stack = packet.item_stacks[-1]
+        obj.item_id = stack.item_id if stack.present else None
+        obj.item_count = stack.item_count if stack.present else 0
+
     def _entity(self, entity_id):
         for collection in (self.g.players, self.g.mobs, self.g.objects):
             entity = collection.get(entity_id)

mosfet/utils.py

@@ -82,33 +82,48 @@ def diffrange(n):
     sign = 1 if n >= 0 else -1
     return range(0, n+sign, sign)
 
-def break_time(block_id, held_item=0, in_water=False, on_ground=True, enchantments=[], effects={}):
+def break_time(block_id, held_item=0, in_water=False, on_ground=True,
-    # from PrismarineJS/prismarine-block
+               enchantments=None, effects=None):
+    """Return vanilla block-breaking duration rounded to whole game ticks."""
     held_item = str(held_item)
     block_data = blocks.get(block_id)
+    hardness = block_data.get('hardness', 0)
+    if hardness < 0:
+        return float('inf')
 
-    can_harvest = 'harvestTools' not in block_data or str(held_item) in block_data['harvestTools']
+    can_harvest = (
+        'harvestTools' not in block_data or
+        held_item in block_data['harvestTools'])
     material = block_data.get('material', 'n/a')
-    tool_multipliers = mcdata.mcd.materials.get(material, [])
+    tool_multipliers = mcdata.mcd.materials.get(material, {})
-    is_best_tool = held_item in tool_multipliers
+    speed = tool_multipliers.get(held_item, 1.0)
-    time = block_data['hardness']
 
-    if can_harvest:
+    enchantments = enchantments or {}
-        time *= 1.5
+    if speed > 1:
-    else:
+        efficiency = int(enchantments.get(
-        time *= 5.0
+            'efficiency', enchantments.get('minecraft:efficiency', 0)) or 0)
+        if efficiency > 0:
+            speed += efficiency * efficiency + 1
 
-    if is_best_tool:
+    effects = effects or {}
-        speed_multiplier = tool_multipliers[held_item]
+    haste = int(effects.get('haste', effects.get('minecraft:haste', 0)) or 0)
-        # TODO: calc efficiency, haste, mining fatigue
+    if haste >= 0 and ('haste' in effects or 'minecraft:haste' in effects):
-    else:
+        speed *= 1 + 0.2 * (haste + 1)
-        speed_multiplier = 1.0
+    fatigue = int(effects.get(
+        'mining_fatigue', effects.get('minecraft:mining_fatigue', -1)))
+    if fatigue >= 0:
+        speed *= (0.3, 0.09, 0.0027, 0.00081, 0.000243)[min(fatigue, 4)]
 
-    time /= speed_multiplier
+    duration = hardness * (1.5 if can_harvest else 5.0) / speed
-    if in_water: time *= 5.0
+    if in_water:
-    if not on_ground: time *= 5.0
+        duration *= 5.0
+    if not on_ground:
+        duration *= 5.0
 
-    return time
+    # Vanilla advances breaking progress in 1/20-second ticks; clients cannot
+    # finish between ticks. Round up, while avoiding floating-point over-round.
+    ticks = max(1, ceil(duration / TICK - 1e-9))
+    return ticks * TICK
 
 def search_2d(distance=0):
     def get_neighbors(x,y,z):

tests/test_break_time.py

@@ -0,0 +1,69 @@
+import math
+import unittest
+from unittest.mock import patch
+from munch import Munch
+
+from mosfet import utils
+from mosfet.game import Game
+from mosfet.info import blocks, items
+
+
+class BlockBreakTimingTests(unittest.TestCase):
+    def test_leaf_time_uses_actual_tool_speed_and_game_ticks(self):
+        oak_leaves = blocks.MCD_BLOCKS['oak_leaves']['minStateId']
+        oak_log = items.get_id('oak_log')
+        wooden_hoe = items.get_id('wooden_hoe')
+
+        self.assertAlmostEqual(utils.break_time(oak_leaves, oak_log), 0.3)
+        self.assertAlmostEqual(utils.break_time(oak_leaves, wooden_hoe), 0.15)
+        self.assertAlmostEqual(
+            utils.break_time(oak_leaves, oak_log, in_water=True), 1.5)
+        self.assertAlmostEqual(
+            utils.break_time(oak_leaves, oak_log, on_ground=False), 1.5)
+
+    def test_efficiency_haste_and_fatigue_affect_break_ticks(self):
+        oak_leaves = blocks.MCD_BLOCKS['oak_leaves']['minStateId']
+        wooden_hoe = items.get_id('wooden_hoe')
+        self.assertAlmostEqual(utils.break_time(
+            oak_leaves, wooden_hoe, enchantments={'efficiency': 1}), 0.1)
+        self.assertAlmostEqual(utils.break_time(
+            oak_leaves, wooden_hoe, effects={'haste': 0}), 0.15)
+        self.assertAlmostEqual(utils.break_time(
+            oak_leaves, wooden_hoe,
+            effects={'mining_fatigue': 0}), 0.5)
+
+    def test_unbreakable_blocks_have_no_completion_deadline(self):
+        bedrock = blocks.MCD_BLOCKS['bedrock']['minStateId']
+        self.assertTrue(math.isinf(utils.break_time(bedrock)))
+
+    def test_game_sends_finish_after_calculated_tick_duration(self):
+        class RecordingConnection:
+            def __init__(self):
+                self.packets = []
+
+            def write_packet(self, packet, force=False):
+                self.packets.append(packet)
+
+        class FakeChunks:
+            @staticmethod
+            def get_block_at(*_position):
+                return blocks.MCD_BLOCKS['oak_leaves']['minStateId']
+
+        connection = RecordingConnection()
+        game = object.__new__(Game)
+        game.g = Munch(
+            connection=connection, chunks=FakeChunks(), inv={},
+            holding=items.get_id('oak_log'), holding_hand=0,
+            holding_slot=0)
+        game.sequence = 0
+        game.break_deadline = None
+        game.breaking_state = None
+        game.next_swing_at = 0.0
+
+        with patch('mosfet.game.time.monotonic', return_value=100.0):
+            self.assertTrue(game.break_block((0, 64, 0)))
+        self.assertAlmostEqual(game.break_deadline, 100.3)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_clear_leaves.py

@@ -0,0 +1,37 @@
+import unittest
+from unittest.mock import patch
+from munch import Munch
+
+from mosfet.jobs.clear_leaves import ClearLeavesStates
+
+
+class ClearLeavesTests(unittest.TestCase):
+    def test_spaces_leaf_breaks_at_configured_interval(self):
+        class FakeGame:
+            def __init__(self):
+                self.broken = []
+
+            def break_block(self, location):
+                self.broken.append(location)
+                return True
+
+        game = FakeGame()
+        state = ClearLeavesStates(Munch(
+            breaking=False, game=game, look_at=None))
+        state.leaves = [(0, 64, 0), (1, 64, 0)]
+
+        with patch('mosfet.jobs.clear_leaves.time.monotonic', return_value=10):
+            state.break_leaves()
+        self.assertEqual(game.broken, [(0, 64, 0)])
+
+        with patch('mosfet.jobs.clear_leaves.time.monotonic', return_value=10.59):
+            state.break_leaves()
+        self.assertEqual(game.broken, [(0, 64, 0)])
+
+        with patch('mosfet.jobs.clear_leaves.time.monotonic', return_value=10.6):
+            state.break_leaves()
+        self.assertEqual(game.broken, [(0, 64, 0), (1, 64, 0)])
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_gather_wood.py

@@ -1,9 +1,15 @@
 import unittest
+from unittest.mock import patch
+
 from munch import Munch
 
+from mosfet.bot import start_automation
 from mosfet.commands import Commands
 from mosfet.info import blocks, items
 from mosfet.job import JobStates
+from mosfet.jobs.gather_wood import GatherWoodStates
+from mosfet.jobs.grab_supplies import GrabSuppliesStates
+from mosfet.protocol.types import Slot
 from mosfet.world import World
 
 
@@ -21,6 +27,27 @@ class GatherWoodPortTests(unittest.TestCase):
         self.assertTrue(blocks.LOG_IDS)
         self.assertTrue(blocks.LOG_IDS.issubset(blocks.INDEXED_IDS))
 
+    def test_mangrove_uses_its_26_3_propagule_and_unplantable_logs_are_skipped(self):
+        self.assertEqual(items.get_sapling_id('mangrove'),
+                         items.get_id('mangrove_propagule'))
+        self.assertIsNone(items.get_sapling_id('crimson'))
+
+        class FakeWorld:
+            def find_trees(self, _position, _distance):
+                return [(0, 64, 0), (3, 64, 0)]
+
+            def block_at(self, x, y, z):
+                return (blocks.MCD_BLOCKS['crimson_stem']['minStateId']
+                        if x == 0 else
+                        blocks.MCD_BLOCKS['mangrove_log']['minStateId'])
+
+        state = GatherWoodStates(
+            Munch(world=FakeWorld(), pos=(0, 64, 0)))
+        state.find_new_tree()
+        self.assertEqual(state.tree, (3, 64, 0))
+        self.assertEqual(state.type, 'mangrove')
+        self.assertEqual(state.bad_trees, [(0, 64, 0)])
+
     def test_tree_search_finds_indexed_26_3_log_states(self):
         oak_log = blocks.MCD_BLOCKS['oak_log']['minStateId']
         oak_leaves = blocks.MCD_BLOCKS['oak_leaves']['minStateId']
@@ -54,7 +81,76 @@ class GatherWoodPortTests(unittest.TestCase):
         self.assertIs(job.gather_wood_states.state.__func__,
                       job.gather_wood_states.idle.__func__)
 
-    def test_gather_wood_command_is_enabled_but_farm_wood_is_not(self):
+    def test_grab_supplies_reads_protocol_777_container_shape(self):
+        axe_id = next(iter(items.AXE_IDS))
+        axe = Slot(present=True, item_id=axe_id, item_count=1)
+        clicks = []
+
+        class FakeGame:
+            def count_inventory_slots(self):
+                return 10
+
+            def click_window(self, *args):
+                clicks.append(args)
+
+        g = Munch(
+            item_lock=False,
+            window=Munch(container_slots=27, contents={0: axe}),
+            maximum_supply_slots=33,
+            game=FakeGame(),
+        )
+        state = GrabSuppliesStates(g)
+        state.target_items = {axe_id}
+        state.maximum_stacks = 9
+        state.grab_items()
+
+        self.assertTrue(g.item_lock)
+        self.assertEqual(state.count, 1)
+        self.assertEqual(clicks, [(0, 0, 1, axe)])
+
+    def test_modern_automation_sets_supply_inventory_limit(self):
+        g = Munch()
+        with patch('mosfet.bot.threading.Thread') as thread:
+            start_automation(g, initialize=False)
+        self.assertEqual(g.maximum_supply_slots, 33)
+        thread.return_value.start.assert_called_once()
+
+    def test_farm_wood_job_keeps_legacy_machine_sequence(self):
+        job = JobStates(Munch())
+        try:
+            self.assertEqual(job.farm_wood(), [
+                job.grab_supplies_states,
+                job.gather_wood_states,
+                job.clear_leaves_states,
+                job.plant_tree_states,
+                job.grab_sapling_states,
+                job.sleep_with_bed_states,
+                job.eat_food_states,
+                job.cache_items_states,
+            ])
+            self.assertEqual(job.grab_supplies_states.supplies, {
+                tuple(items.AXE_IDS): (1, 9),
+            })
+            self.assertTrue(job.sleep_with_bed_states.silent)
+            self.assertTrue(job.cache_items_states.silent)
+            self.assertTrue(items.AXE_IDS.issubset(items.NEEDED_ITEMS))
+            self.assertTrue(items.SAPLING_IDS.issubset(items.WANTED_ITEMS))
+
+            job.grab_supplies_states.state = job.grab_supplies_states.find_barrels
+            job.clear_leaves_states.state = job.clear_leaves_states.find_leaves
+            job.plant_tree_states.state = job.plant_tree_states.check_feet
+            job.grab_sapling_states.state = job.grab_sapling_states.find_saplings
+            job.stop()
+            for machine in (job.grab_supplies_states,
+                            job.clear_leaves_states,
+                            job.plant_tree_states,
+                            job.grab_sapling_states):
+                self.assertIs(machine.state.__func__, machine.idle.__func__)
+        finally:
+            items.set_needed(set())
+            items.set_wanted(set())
+
+    def test_gather_and_farm_wood_commands_are_enabled(self):
         class FakeChat:
             def __init__(self):
                 self.sent = []
@@ -75,7 +171,8 @@ class GatherWoodPortTests(unittest.TestCase):
 
         chat.sent.clear()
         Commands(g).handle_chat(('CHAT', 'tester', 'tester: 1farm wood'))
-        self.assertEqual(chat.sent, ['not migrated to Minecraft 26.3 yet'])
+        self.assertEqual(chat.sent, ['ok'])
+        self.assertIs(job.state.__func__, job.farm_wood.__func__)
 
 
 if __name__ == '__main__':

tests/test_sapling_entities.py

@@ -0,0 +1,60 @@
+import io
+import unittest
+from munch import Munch
+
+from minecraft.networking.modern import (
+    ModernPlayingReactor, SetEntityDataPacket,
+)
+from mosfet.info import items
+from mosfet.protocol.managers import EntityManager
+from mosfet.world import World
+
+
+def encode_varint(value):
+    encoded = bytearray()
+    while value & ~0x7F:
+        encoded.append((value & 0x7F) | 0x80)
+        value >>= 7
+    encoded.append(value)
+    return bytes(encoded)
+
+
+class SaplingEntityTests(unittest.TestCase):
+    def test_protocol_777_item_metadata_decodes_item_stack(self):
+        sapling_id = items.get_id('oak_sapling')
+        payload = (
+            encode_varint(42) +
+            bytes((8,)) + encode_varint(7) +
+            encode_varint(1) + encode_varint(sapling_id) +
+            encode_varint(0) + encode_varint(0) +
+            bytes((0xFF,))
+        )
+        packet = SetEntityDataPacket()
+        packet.read(io.BytesIO(payload))
+
+        self.assertEqual(packet.entity_id, 42)
+        self.assertEqual(len(packet.item_stacks), 1)
+        self.assertEqual(packet.item_stacks[0].item_id, sapling_id)
+        self.assertIn(SetEntityDataPacket,
+                      ModernPlayingReactor.get_clientbound_packets(None))
+
+    def test_item_metadata_makes_dropped_sapling_searchable(self):
+        sapling_id = items.get_id('oak_sapling')
+        entity = Munch(entity_id=42, x=1.0, y=65.0, z=2.0)
+        manager = object.__new__(EntityManager)
+        manager.g = Munch(objects={42: entity})
+        packet = Munch(
+            entity_id=42,
+            item_stacks=[Munch(present=True, item_id=sapling_id,
+                               item_count=1)],
+        )
+        manager.handle_entity_data(packet)
+
+        found = World(Munch(objects={42: entity})).find_objects(
+            items.SAPLING_IDS)
+        self.assertEqual(found, [entity])
+        self.assertEqual(entity.item_count, 1)
+
+
+if __name__ == '__main__':
+    unittest.main()