test: Add comprehensive test suite

- Add fixtures for missions, demo_users, games
- Add model tests for Mission and Game
- Add controller tests for MissionsController
- Test validations, scopes, and methods
- Test state management and health clamping
- Ready for integration testing in host app

test/controllers/break_escape/missions_controller_test.rb

@@ -0,0 +1,18 @@
+require 'test_helper'
+
+module BreakEscape
+  class MissionsControllerTest < ActionDispatch::IntegrationTest
+    include Engine.routes.url_helpers
+
+    test "should get index" do
+      get missions_url
+      assert_response :success
+    end
+
+    test "should show published mission" do
+      mission = break_escape_missions(:ceo_exfil)
+      get mission_url(mission)
+      assert_response :redirect  # Redirects to game
+    end
+  end
+end

test/fixtures/break_escape/demo_users.yml

@@ -0,0 +1,5 @@
+test_user:
+  handle: test_user
+
+other_user:
+  handle: other_user

test/fixtures/break_escape/games.yml

@@ -0,0 +1,7 @@
+active_game:
+  player: test_user (BreakEscape::DemoUser)
+  mission: ceo_exfil
+  scenario_data: { "startRoom": "reception", "rooms": {} }
+  player_state: { "currentRoom": "reception", "unlockedRooms": ["reception"] }
+  status: in_progress
+  score: 0

test/fixtures/break_escape/missions.yml

@@ -0,0 +1,13 @@
+ceo_exfil:
+  name: ceo_exfil
+  display_name: CEO Exfiltration
+  description: Test scenario
+  published: true
+  difficulty_level: 3
+
+unpublished:
+  name: test_unpublished
+  display_name: Unpublished Test
+  description: Not visible
+  published: false
+  difficulty_level: 1

test/models/break_escape/game_test.rb

@@ -0,0 +1,38 @@
+require 'test_helper'
+
+module BreakEscape
+  class GameTest < ActiveSupport::TestCase
+    setup do
+      @game = games(:active_game)
+    end
+
+    test "should belong to player and mission" do
+      assert @game.player
+      assert @game.mission
+    end
+
+    test "should unlock room" do
+      @game.unlock_room!('office')
+      assert @game.room_unlocked?('office')
+    end
+
+    test "should track inventory" do
+      item = { 'type' => 'key', 'name' => 'Test Key' }
+      @game.add_inventory_item!(item)
+      assert_includes @game.player_state['inventory'], item
+    end
+
+    test "should update health" do
+      @game.update_health!(50)
+      assert_equal 50, @game.player_state['health']
+    end
+
+    test "should clamp health between 0 and 100" do
+      @game.update_health!(150)
+      assert_equal 100, @game.player_state['health']
+
+      @game.update_health!(-10)
+      assert_equal 0, @game.player_state['health']
+    end
+  end
+end

test/models/break_escape/mission_test.rb

@@ -0,0 +1,28 @@
+require 'test_helper'
+
+module BreakEscape
+  class MissionTest < ActiveSupport::TestCase
+    test "should validate presence of name" do
+      mission = Mission.new(display_name: 'Test')
+      assert_not mission.valid?
+      assert mission.errors[:name].any?
+    end
+
+    test "should validate uniqueness of name" do
+      Mission.create!(name: 'test', display_name: 'Test')
+      duplicate = Mission.new(name: 'test', display_name: 'Test 2')
+      assert_not duplicate.valid?
+    end
+
+    test "published scope returns only published missions" do
+      assert_includes Mission.published, missions(:ceo_exfil)
+      assert_not_includes Mission.published, missions(:unpublished)
+    end
+
+    test "scenario_path returns correct path" do
+      mission = missions(:ceo_exfil)
+      expected = Rails.root.join('app', 'assets', 'scenarios', 'ceo_exfil')
+      assert_equal expected, mission.scenario_path
+    end
+  end
+end