initial: actor-test v0.1.0 — 8 assertions

Phase-A.5 test-lib for lib-core.actor. Covers create-validation
(missing/zero movement_speed loud-errors + valid spec), position
(initial x/y), move ((0,0) no-op + additive delta), movement_speed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

init.lua

@@ -0,0 +1,85 @@
+-- lib-core.actor-test — Phase A.5
+-- 8 assertions: 3 create-validation + 2 position + 2 move + 1 movement_speed.
+-- Pattern follows P.2.4 Test-Module-Pattern; TAP output via engine.test.*
+
+local actor       = require("lib-core.actor")
+local composition = require("lib-core.composition")
+local T           = engine.test
+
+local M = {}
+
+function M.run_tests(ctx)
+    -- Caller-side: define a template once. Actor doesn't auto-define.
+    composition.define_template{
+        id = "test_actor",
+        properties = {
+            position       = {x = 0, y = 0},
+            movement_speed = 100,
+        },
+        tags = {"renderable"},
+    }
+
+    -- ----------------------------------------------------------------
+    -- create-validation (3)
+    -- ----------------------------------------------------------------
+
+    -- Loud-error on missing movement_speed
+    local ok_missing_ms = pcall(actor.create, {
+        template = "test_actor",
+        properties = { position = {x = 0, y = 0} },
+    })
+    T.assert(not ok_missing_ms,
+        "actor.create loud-errors when properties.movement_speed missing")
+
+    -- Loud-error on non-positive movement_speed
+    local ok_zero_ms = pcall(actor.create, {
+        template = "test_actor",
+        properties = { position = {x = 0, y = 0}, movement_speed = 0 },
+    })
+    T.assert(not ok_zero_ms,
+        "actor.create loud-errors when movement_speed is 0")
+
+    -- Happy path: valid spec returns a handle
+    local a1 = actor.create{
+        template = "test_actor",
+        properties = {
+            position       = {x = 100, y = 200},
+            movement_speed = 150,
+        },
+    }
+    T.assert(a1 ~= nil, "actor.create returns non-nil handle on valid spec")
+
+    -- ----------------------------------------------------------------
+    -- position (2)
+    -- ----------------------------------------------------------------
+
+    -- position returns initial values
+    local x, y = actor.position(a1)
+    T.equals(x, 100, "actor.position returns initial x")
+    T.equals(y, 200, "actor.position returns initial y")
+
+    -- ----------------------------------------------------------------
+    -- move (2)
+    -- ----------------------------------------------------------------
+
+    -- move(0, 0) is no-op
+    actor.move(a1, 0, 0)
+    local x0, y0 = actor.position(a1)
+    T.assert(x0 == 100 and y0 == 200,
+        "actor.move(0,0) preserves position")
+
+    -- move(dx, dy) updates position additively
+    actor.move(a1, 50, -25)
+    local x1, y1 = actor.position(a1)
+    T.assert(x1 == 150 and y1 == 175,
+        "actor.move(50,-25) shifts position to (150, 175)")
+
+    -- ----------------------------------------------------------------
+    -- movement_speed (1)
+    -- ----------------------------------------------------------------
+
+    T.equals(actor.movement_speed(a1), 150,
+        "actor.movement_speed returns the override value (150)")
+end
+
+return M