From 5b2427d52257402de0ed8d2f0203aac48a790623 Mon Sep 17 00:00:00 2001
From: Axel Meyer <axel.meyer@durania.net>
Date: Thu, 14 May 2026 15:08:45 +0200
Subject: [PATCH] =?UTF-8?q?feat(P.3.6):=20lib-core.selection-test=20v0.1.0?=
 =?UTF-8?q?=20=E2=80=94=2019=20state=20assertions?=
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---
 init.lua        | 68 +++++++++++++++++++++++++++++++++++++++++++++++++
 manifest.core   |  6 +++++
 manifest.module | 12 +++++++++
 3 files changed, 86 insertions(+)
 create mode 100644 init.lua
 create mode 100644 manifest.core
 create mode 100644 manifest.module

diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..1787d3d
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,68 @@
+-- lib-core.selection-test — 19 pure-state assertions for v0.1.0.
+-- See meta/docs/superpowers/specs/2026-05-14-p3-6-lib-selection-design.md §5.
+
+local selection = require("lib-core.selection")
+local T         = engine.test
+
+function init(ctx)
+    -- Register / Unregister (3)
+    local h1 = selection.register(function() return {x=0, y=0, w=10, h=10} end)
+    T.assert(h1 ~= nil and h1 >= 1, "register returns positive handle")
+    T.equals(selection.count_registered(), 1, "count_registered after register")
+    selection.unregister(h1)
+    T.equals(selection.count_registered(), 0, "count_registered after unregister")
+
+    -- Re-register for set-tests
+    local h2 = selection.register(function() return {x=0,  y=0, w=10, h=10} end)
+    local h3 = selection.register(function() return {x=20, y=0, w=10, h=10} end)
+    local h4 = selection.register(function() return {x=40, y=0, w=10, h=10} end)
+
+    -- Set-Query: initial empty (2)
+    T.assert(selection.is_empty(), "is_empty after registers (no selection yet)")
+    T.equals(selection.count(), 0, "count = 0 initially")
+
+    -- Set-Mutation (5)
+    selection.add(h2)
+    T.assert(selection.contains(h2), "add → contains")
+    T.equals(selection.count(), 1, "count = 1 after add")
+    selection.remove(h2)
+    T.assert(not selection.contains(h2), "remove → !contains")
+    selection.toggle(h3); T.assert(selection.contains(h3), "toggle adds when absent")
+    selection.toggle(h3); T.assert(not selection.contains(h3), "toggle removes when present")
+    selection.add(h2); selection.add(h4); selection.clear()
+    T.assert(selection.is_empty(), "clear → empty")
+
+    -- Unregister cleans up selection (1)
+    selection.add(h2)
+    selection.unregister(h2)
+    T.assert(not selection.contains(h2), "unregister removes from selection")
+
+    -- Drag-Threshold (2)
+    T.equals(selection.drag_threshold(), 4, "default threshold = 4")
+    selection.set_drag_threshold(8)
+    T.equals(selection.drag_threshold(), 8, "set_drag_threshold writes")
+
+    -- Drag-State + box_rect (2)
+    T.equals(selection.drag_state(), "idle", "initial drag_state = idle")
+    T.assert(selection.box_rect() == nil, "box_rect nil while idle")
+
+    -- Enabled-Flag (2)
+    T.assert(selection.enabled(), "enabled default true")
+    selection.set_enabled(false)
+    T.assert(not selection.enabled(), "set_enabled(false) writes")
+    selection.set_enabled(true)
+
+    -- Visual-Setters (2)
+    selection.set_drag_box_color(10, 20, 30, 40)
+    local c = selection.drag_box_color()
+    T.assert(c[1]==10 and c[2]==20 and c[3]==30 and c[4]==40,
+             "set_drag_box_color writes correctly")
+    selection.set_highlight_color(50, 60, 70, 80)
+    local hc = selection.highlight_color()
+    T.assert(hc[1]==50 and hc[2]==60 and hc[3]==70 and hc[4]==80,
+             "set_highlight_color writes correctly")
+
+    -- Error-Handling (1)
+    local ok = pcall(function() selection.set_drag_threshold(-1) end)
+    T.assert(not ok, "set_drag_threshold(-1) errors")
+end
diff --git a/manifest.core b/manifest.core
new file mode 100644
index 0000000..a810e5e
--- /dev/null
+++ b/manifest.core
@@ -0,0 +1,6 @@
+{
+    "id": "lib-core.selection-test.core",
+    "kind": "lib",
+    "version": "0.1.0",
+    "license": "Proprietary"
+}
diff --git a/manifest.module b/manifest.module
new file mode 100644
index 0000000..965da8d
--- /dev/null
+++ b/manifest.module
@@ -0,0 +1,12 @@
+{
+    "id": "lib-core.selection-test",
+    "version": "0.1.0",
+    "kind": "test-module",
+    "api": "^0.1",
+    "entry_point": "init.lua",
+    "deps": [
+        { "id": "lib-core.selection", "version": "0.1.0" },
+        { "id": "lib-core.input",     "version": "0.3.0" },
+        { "id": "lib-core.camera",    "version": "0.3.0" }
+    ]
+}