Fixing a handfull of issues!

adapters/bukkit/plugin/src/test/gameplay/native-terrain-support.mjs

@@ -0,0 +1,61 @@
+import { readFile } from 'node:fs/promises'
+import path from 'node:path'
+
+const world = 'native-terrain-support'
+const air = new Set(['air', 'cave_air', 'void_air'])
+
+export default {
+  name: 'iris-native-terrain-support',
+  description: 'Verify native terrain fitting preserves buried caves and excludes trees from lowered ground.',
+  async run(context) {
+    const bot = context.bot
+    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
+    context.expect(/^isolated=true\s*$/m.test(source), 'Requires an isolated instance')
+    const position = bot.entity.position.clone()
+    const at = (x, y, z) => bot.blockAt(position.clone().set(x, y, z))
+    const teleport = async (x, y, z) => {
+      await context.command(`/minecraft:tp @s ${x + 0.5} ${y} ${z + 0.5}`, /Teleported/i, 60000)
+      await context.waitUntil(() => Math.abs(bot.entity.position.x - x - 0.5) < 1
+        && Math.abs(bot.entity.position.z - z - 0.5) < 1 && at(x, y, z),
+      { label: 'Coordinate chunk received', timeoutMs: 90000, intervalMs: 100 })
+    }
+    await context.step('enter the seeded overworld', async () => {
+      if (context.options.command !== 'reuse') {
+        await context.command(`/iris create name=${world} type=overworld seed=1337`,
+          /Successfully created your world/i, 240000)
+      }
+      await context.command(`/iris tp ${world}`)
+      await context.waitUntil(async () => {
+        const snapshot = await context.observe()
+        const player = snapshot.players.find(entry => entry.username === bot.username)
+        return snapshot.worlds.some(entry => entry.id === player?.world && entry.name.endsWith(world))
+      }, { label: 'Entered seeded overworld', timeoutMs: 90000, intervalMs: 100 })
+      await context.command('/minecraft:gamemode spectator @s', /Spectator Mode/i)
+      await context.command('/minecraft:seed', /Seed:.*1337/)
+    })
+    await context.step('preserve caves beneath the ruined portal terrain skirt', async () => {
+      await teleport(995, 44, -3611)
+      await context.waitUntil(() => at(990, 43, -3626) && at(992, 43, -3627),
+        { label: 'Cave columns received', timeoutMs: 90000, intervalMs: 100 })
+      for (const [x, z, bottom, top] of [[990, -3626, 33, 54], [992, -3627, 34, 55]]) {
+        for (let y = bottom; y <= top; y++) {
+          const block = at(x, y, z)
+          context.expect(block && air.has(block.name), 'Native terrain fitting filled a buried cave',
+            { x, y, z, material: block?.name })
+        }
+        await context.command(`/execute if block ${x} 43 ${z} minecraft:cave_air run say CAVE_PRESERVED_${x}`,
+          new RegExp(`CAVE_PRESERVED_${x}`))
+      }
+    })
+    await context.step('exclude the pine whose support is removed by village grading', async () => {
+      await teleport(-2601, 174, -7063)
+      await context.waitUntil(() => at(-2601, 167, -7063),
+        { label: 'Pine column received', timeoutMs: 90000, intervalMs: 100 })
+      const block = at(-2601, 167, -7063)
+      context.expect(air.has(block.name), 'Tree remains above terrain removed by native grading',
+        { x: -2601, y: 167, z: -7063, material: block.name })
+      await context.command('/execute if block -2601 167 -7063 minecraft:air run say PINE_EXCLUDED',
+        /PINE_EXCLUDED/)
+    })
+  }
+}