tests

testing/__tests__/01_absolute_positioning.lua

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+package.path = package.path .. ";?.lua"
+
+local luaunit = require("testing/luaunit")
+require("testing/loveStub") -- Required to mock LOVE functions
+local FlexLove = require("FlexLove")
+
+-- Create test cases
+TestAbsolutePositioning = {}
+
+function TestAbsolutePositioning:setUp()
+  -- Reset layout engine before each test
+  self.GUI = FlexLove.GUI
+end
+
+function TestAbsolutePositioning:testBasicAbsolutePositioning()
+  -- Test basic absolute positioning - similar to CSS position: absolute
+  local element = self.GUI.new({
+    x = 100,
+    y = 150,
+    w = 200,
+    h = 100,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  luaunit.assertEquals(element.x, 100)
+  luaunit.assertEquals(element.y, 150)
+  luaunit.assertEquals(element.width, 200)
+  luaunit.assertEquals(element.height, 100)
+  luaunit.assertEquals(element.positioning, FlexLove.enums.Positioning.ABSOLUTE)
+end
+
+function TestAbsolutePositioning:testAbsolutePositioningWithOffsets()
+  -- Test absolute positioning with top/left/right/bottom - like CSS absolute positioning
+  local container = self.GUI.new({
+    x = 0,
+    y = 0,
+    w = 500,
+    h = 500,
+  })
+
+  local child = self.GUI.new({
+    parent = container,
+    x = 50,
+    y = 75,
+    w = 100,
+    h = 50,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  -- Element should maintain its absolute position
+  luaunit.assertEquals(child.x, 50)
+  luaunit.assertEquals(child.y, 75)
+  luaunit.assertEquals(child.width, 100)
+  luaunit.assertEquals(child.height, 50)
+end
+
+function TestAbsolutePositioning:testAbsolutePositioningInContainer()
+  -- Test absolute positioning within a container - similar to CSS relative container
+  local container = self.GUI.new({
+    x = 100,
+    y = 100,
+    w = 500,
+    h = 500,
+  })
+
+  local child = self.GUI.new({
+    parent = container,
+    x = 50,
+    y = 50,
+    w = 100,
+    h = 100,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  -- Child should keep its absolute position
+  luaunit.assertEquals(child.x, 50)
+  luaunit.assertEquals(child.y, 50)
+  luaunit.assertEquals(child.width, 100)
+  luaunit.assertEquals(child.height, 100)
+end
+
+function TestAbsolutePositioning:testAbsolutePositioningWithRightBottom()
+  -- Test absolute positioning with right/bottom properties - like CSS
+  local container = self.GUI.new({
+    x = 0,
+    y = 0,
+    w = 1000,
+    h = 800,
+  })
+
+  local child = self.GUI.new({
+    parent = container,
+    x = 850,
+    y = 650,
+    w = 100,
+    h = 100,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  -- Child should maintain its position from right/bottom edges
+  luaunit.assertEquals(child.x, 850)
+  luaunit.assertEquals(child.y, 650)
+  luaunit.assertEquals(child.width, 100)
+  luaunit.assertEquals(child.height, 100)
+end
+
+function TestAbsolutePositioning:testAbsolutePositioningZIndex()
+  -- Test z-index with absolute positioning - like CSS z-index
+  local container = self.GUI.new({
+    x = 0,
+    y = 0,
+    w = 500,
+    h = 500,
+  })
+
+  local child1 = self.GUI.new({
+    parent = container,
+    x = 0,
+    y = 0,
+    w = 100,
+    h = 100,
+    z = 1,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  local child2 = self.GUI.new({
+    parent = container,
+    x = 50,
+    y = 50,
+    w = 100,
+    h = 100,
+    z = 2,
+    positioning = FlexLove.enums.Positioning.ABSOLUTE,
+  })
+
+  -- Elements should maintain their z-index order
+  luaunit.assertEquals(child1.z, 1)
+  luaunit.assertEquals(child2.z, 2)
+  luaunit.assertTrue(child1.z < child2.z)
+end
+
+luaunit.LuaUnit.run()