-- Test suite for Element.lua
-- Tests element creation, size calculations, and basic functionality

package.path = package.path .. ";./?.lua;./modules/?.lua"

-- Load love stub before anything else
require("testing.loveStub")

local luaunit = require("testing.luaunit")
local ErrorHandler = require("modules.ErrorHandler")

-- Initialize ErrorHandler
ErrorHandler.init({})

-- Load FlexLove which properly initializes all dependencies
local FlexLove = require("FlexLove")
local ErrorHandler = require("modules.ErrorHandler")

-- Initialize ErrorHandler
ErrorHandler.init({})

-- Test suite for Element creation
TestElementCreation = {}

function TestElementCreation:setUp()
  -- Initialize FlexLove for each test
  FlexLove.beginFrame(1920, 1080)
end

function TestElementCreation:tearDown()
  FlexLove.endFrame()
end

function TestElementCreation:test_create_minimal_element()
  local element = FlexLove.new({
    id = "test1",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.id, "test1")
  luaunit.assertEquals(element.x, 10)
  luaunit.assertEquals(element.y, 20)
  luaunit.assertEquals(element.width, 100)
  luaunit.assertEquals(element.height, 50)
end

function TestElementCreation:test_element_with_text()
  local element = FlexLove.new({
    id = "text1",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    text = "Hello World",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.text, "Hello World")
end

function TestElementCreation:test_element_with_backgroundColor()
  local element = FlexLove.new({
    id = "colored1",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    backgroundColor = { 1, 0, 0, 1 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertNotNil(element.backgroundColor)
end

function TestElementCreation:test_element_with_children()
  local parent = FlexLove.new({
    id = "parent1",
    x = 0,
    y = 0,
    width = 300,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child1",
    x = 10,
    y = 10,
    width = 50,
    height = 50,
    parent = parent,
  })

  luaunit.assertNotNil(parent)
  luaunit.assertNotNil(child)
  luaunit.assertEquals(child.parent, parent)
  luaunit.assertEquals(#parent.children, 1)
  luaunit.assertEquals(parent.children[1], child)
end

function TestElementCreation:test_element_with_padding()
  local element = FlexLove.new({
    id = "padded1",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    padding = { horizontal = 10, vertical = 10 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.padding.left, 10)
  luaunit.assertEquals(element.padding.top, 10)
  luaunit.assertEquals(element.padding.right, 10)
  luaunit.assertEquals(element.padding.bottom, 10)
end

function TestElementCreation:test_element_with_margin()
  local element = FlexLove.new({
    id = "margined1",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    margin = { horizontal = 5, vertical = 5 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.margin.left, 5)
  luaunit.assertEquals(element.margin.top, 5)
  luaunit.assertEquals(element.margin.right, 5)
  luaunit.assertEquals(element.margin.bottom, 5)
end

-- Test suite for Element sizing
TestElementSizing = {}

function TestElementSizing:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementSizing:tearDown()
  FlexLove.endFrame()
end

function TestElementSizing:test_getBorderBoxWidth()
  local element = FlexLove.new({
    id = "sized1",
    x = 0,
    y = 0,
    width = 100,
    height = 50,
  })

  local borderBoxWidth = element:getBorderBoxWidth()
  luaunit.assertEquals(borderBoxWidth, 100)
end

function TestElementSizing:test_getBorderBoxHeight()
  local element = FlexLove.new({
    id = "sized2",
    x = 0,
    y = 0,
    width = 100,
    height = 50,
  })

  local borderBoxHeight = element:getBorderBoxHeight()
  luaunit.assertEquals(borderBoxHeight, 50)
end

function TestElementSizing:test_getBounds()
  local element = FlexLove.new({
    id = "bounds1",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  local bounds = element:getBounds()
  luaunit.assertEquals(bounds.x, 10)
  luaunit.assertEquals(bounds.y, 20)
  luaunit.assertEquals(bounds.width, 100)
  luaunit.assertEquals(bounds.height, 50)
end

function TestElementSizing:test_contains_point_inside()
  local element = FlexLove.new({
    id = "contains1",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  local contains = element:contains(50, 40)
  luaunit.assertTrue(contains)
end

function TestElementSizing:test_contains_point_outside()
  local element = FlexLove.new({
    id = "contains2",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  local contains = element:contains(150, 100)
  luaunit.assertFalse(contains)
end

function TestElementSizing:test_contains_point_on_edge()
  local element = FlexLove.new({
    id = "contains3",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  -- Point on right edge
  local contains = element:contains(110, 40)
  luaunit.assertTrue(contains)

  -- Point on bottom edge
  contains = element:contains(50, 70)
  luaunit.assertTrue(contains)
end

-- Test suite for Element with units (units are resolved immediately after creation)
TestElementUnits = {}

function TestElementUnits:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementUnits:tearDown()
  FlexLove.endFrame()
end

function TestElementUnits:test_element_with_percentage_width()
  local parent = FlexLove.new({
    id = "parent_pct",
    x = 0,
    y = 0,
    width = 1000,
    height = 500,
  })

  local child = FlexLove.new({
    id = "child_pct",
    x = 0,
    y = 0,
    width = "50%",
    height = 100,
    parent = parent,
  })

  luaunit.assertNotNil(child)
  -- Width should be resolved to 500 (50% of parent's 1000)
  luaunit.assertEquals(child.width, 500)
end

function TestElementUnits:test_element_with_viewport_units()
  local element = FlexLove.new({
    id = "viewport1",
    x = 0,
    y = 0,
    width = "50vw", -- 50% of viewport width (1920) = 960
    height = "25vh", -- 25% of viewport height (1080) = 270
  })

  luaunit.assertNotNil(element)
  -- Units should be resolved immediately to numbers
  luaunit.assertEquals(type(element.width), "number")
  luaunit.assertEquals(type(element.height), "number")
  -- Should be positive values
  luaunit.assertTrue(element.width > 0)
  luaunit.assertTrue(element.height > 0)
end

-- Test suite for Element positioning
TestElementPositioning = {}

function TestElementPositioning:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementPositioning:tearDown()
  FlexLove.endFrame()
end

function TestElementPositioning:test_element_absolute_position()
  local element = FlexLove.new({
    id = "abs1",
    x = 100,
    y = 200,
    width = 50,
    height = 50,
    positioning = "absolute",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.positioning, "absolute")
end

function TestElementPositioning:test_nested_element_positions()
  local parent = FlexLove.new({
    id = "nest_parent",
    x = 100,
    y = 100,
    width = 300,
    height = 200,
  })

  local child = FlexLove.new({
    id = "nest_child",
    x = 20,
    y = 30,
    width = 50,
    height = 50,
    parent = parent,
  })

  luaunit.assertNotNil(parent)
  luaunit.assertNotNil(child)
  -- Child positions are absolute in FlexLove, not relative to parent
  -- So child.x = parent.x + relative_x = 100 + 20 = 120
  luaunit.assertEquals(child.x, 120)
  luaunit.assertEquals(child.y, 130)
end

-- Test suite for Element flex layout
TestElementFlex = {}

function TestElementFlex:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementFlex:tearDown()
  FlexLove.endFrame()
end

function TestElementFlex:test_element_with_flex_direction()
  local element = FlexLove.new({
    id = "flex1",
    x = 0,
    y = 0,
    width = 300,
    height = 200,
    positioning = "flex",
    flexDirection = "horizontal",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.flexDirection, "horizontal")
end

function TestElementFlex:test_element_with_flex_properties()
  local parent = FlexLove.new({
    id = "flex_parent",
    x = 0,
    y = 0,
    width = 300,
    height = 200,
    positioning = "flex",
    flexDirection = "horizontal",
  })

  local element = FlexLove.new({
    id = "flex2",
    parent = parent,
    width = 100,
    height = 100,
    flexGrow = 1,
    flexShrink = 0,
    flexBasis = "auto",
  })

  luaunit.assertNotNil(element)
  -- Just check element was created successfully
  -- Flex properties are handled by LayoutEngine, not stored on element
  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.parent, parent)
end

function TestElementFlex:test_element_with_gap()
  local element = FlexLove.new({
    id = "gap1",
    x = 0,
    y = 0,
    width = 300,
    height = 200,
    positioning = "flex",
    gap = 10,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.gap, 10)
end

-- Test suite for Element styling properties
TestElementStyling = {}

function TestElementStyling:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementStyling:tearDown()
  FlexLove.endFrame()
end

function TestElementStyling:test_element_with_border()
  local element = FlexLove.new({
    id = "bordered1",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    border = 2,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.border, 2)
end

function TestElementStyling:test_element_with_corner_radius()
  local element = FlexLove.new({
    id = "rounded1",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    cornerRadius = 10,
  })

  luaunit.assertNotNil(element)
  -- Corner radius might be stored as a table
  luaunit.assertNotNil(element.cornerRadius)
end

function TestElementStyling:test_element_with_text_align()
  local element = FlexLove.new({
    id = "aligned1",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    text = "Centered Text",
    textAlign = "center",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.textAlign, "center")
end

function TestElementStyling:test_element_with_opacity()
  local element = FlexLove.new({
    id = "transparent1",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    opacity = 0.5,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.opacity, 0.5)
end

function TestElementStyling:test_element_with_border_color()
  local element = FlexLove.new({
    id = "colored_border",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    border = 2,
    borderColor = { 1, 0, 0, 1 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertNotNil(element.borderColor)
end

-- Test suite for Element methods
TestElementMethods = {}

function TestElementMethods:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementMethods:tearDown()
  FlexLove.endFrame()
end

function TestElementMethods:test_element_setText()
  local element = FlexLove.new({
    id = "textual1",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    text = "Initial",
  })

  element:setText("Updated")
  luaunit.assertEquals(element.text, "Updated")
end

function TestElementMethods:test_element_addChild()
  local parent = FlexLove.new({
    id = "parent_add",
    x = 0,
    y = 0,
    width = 300,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child_add",
    x = 10,
    y = 10,
    width = 50,
    height = 50,
  })

  parent:addChild(child)
  luaunit.assertEquals(#parent.children, 1)
  luaunit.assertEquals(parent.children[1], child)
  luaunit.assertEquals(child.parent, parent)
end
-- Test suite for scroll-related functions
TestElementScroll = {}

function TestElementScroll:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementScroll:tearDown()
  FlexLove.endFrame()
end

function TestElementScroll:test_scrollable_element_with_overflow()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.overflow, "scroll")
  luaunit.assertNotNil(element._scrollManager)
end

function TestElementScroll:test_setScrollPosition()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:setScrollPosition(50, 100)
  local scrollX, scrollY = element:getScrollPosition()

  -- Note: actual scroll may be clamped based on content
  luaunit.assertNotNil(scrollX)
  luaunit.assertNotNil(scrollY)
end

function TestElementScroll:test_scrollBy()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  local initialX, initialY = element:getScrollPosition()
  element:scrollBy(10, 20)
  local newX, newY = element:getScrollPosition()

  luaunit.assertNotNil(newX)
  luaunit.assertNotNil(newY)
end

function TestElementScroll:test_scrollToTop()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:scrollToTop()
  local _, scrollY = element:getScrollPosition()
  luaunit.assertEquals(scrollY, 0)
end

function TestElementScroll:test_scrollToBottom()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:scrollToBottom()
  -- Bottom position depends on content, just verify it doesn't error
  local _, scrollY = element:getScrollPosition()
  luaunit.assertNotNil(scrollY)
end

function TestElementScroll:test_scrollToLeft()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:scrollToLeft()
  local scrollX, _ = element:getScrollPosition()
  luaunit.assertEquals(scrollX, 0)
end

function TestElementScroll:test_scrollToRight()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:scrollToRight()
  local scrollX, _ = element:getScrollPosition()
  luaunit.assertNotNil(scrollX)
end

function TestElementScroll:test_getMaxScroll()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  local maxX, maxY = element:getMaxScroll()
  luaunit.assertNotNil(maxX)
  luaunit.assertNotNil(maxY)
end

function TestElementScroll:test_getScrollPercentage()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  local percentX, percentY = element:getScrollPercentage()
  luaunit.assertNotNil(percentX)
  luaunit.assertNotNil(percentY)
  luaunit.assertTrue(percentX >= 0 and percentX <= 1)
  luaunit.assertTrue(percentY >= 0 and percentY <= 1)
end

function TestElementScroll:test_hasOverflow()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  local hasOverflowX, hasOverflowY = element:hasOverflow()
  luaunit.assertNotNil(hasOverflowX)
  luaunit.assertNotNil(hasOverflowY)
end

function TestElementScroll:test_getContentSize()
  local element = FlexLove.new({
    id = "scrollable",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  local contentWidth, contentHeight = element:getContentSize()
  luaunit.assertNotNil(contentWidth)
  luaunit.assertNotNil(contentHeight)
end

-- Test suite for element geometry and bounds
TestElementGeometry = {}

function TestElementGeometry:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementGeometry:tearDown()
  FlexLove.endFrame()
end

function TestElementGeometry:test_getBounds()
  local element = FlexLove.new({
    id = "test",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  local bounds = element:getBounds()
  luaunit.assertEquals(bounds.x, 10)
  luaunit.assertEquals(bounds.y, 20)
  luaunit.assertEquals(bounds.width, 100)
  luaunit.assertEquals(bounds.height, 50)
end

function TestElementGeometry:test_contains_point_inside()
  local element = FlexLove.new({
    id = "test",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  luaunit.assertTrue(element:contains(50, 40))
end

function TestElementGeometry:test_contains_point_outside()
  local element = FlexLove.new({
    id = "test",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  luaunit.assertFalse(element:contains(200, 200))
end

function TestElementGeometry:test_getBorderBoxWidth_no_border()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 50,
  })

  local borderBoxWidth = element:getBorderBoxWidth()
  luaunit.assertEquals(borderBoxWidth, 100)
end

function TestElementGeometry:test_getBorderBoxHeight_no_border()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 50,
  })

  local borderBoxHeight = element:getBorderBoxHeight()
  luaunit.assertEquals(borderBoxHeight, 50)
end

function TestElementGeometry:test_getBorderBoxWidth_with_border()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 50,
    border = { left = 2, right = 2, top = 0, bottom = 0 },
  })

  local borderBoxWidth = element:getBorderBoxWidth()
  -- Width includes left + right borders
  luaunit.assertTrue(borderBoxWidth >= 100)
end

function TestElementGeometry:test_getAvailableContentWidth()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    padding = { top = 10, right = 10, bottom = 10, left = 10 },
  })

  local availWidth = element:getAvailableContentWidth()
  luaunit.assertNotNil(availWidth)
  -- Should be less than total width due to padding
  luaunit.assertTrue(availWidth <= 200)
end

function TestElementGeometry:test_getAvailableContentHeight()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    padding = { top = 10, right = 10, bottom = 10, left = 10 },
  })

  local availHeight = element:getAvailableContentHeight()
  luaunit.assertNotNil(availHeight)
  -- Should be less than total height due to padding
  luaunit.assertTrue(availHeight <= 100)
end

function TestElementGeometry:test_getScaledContentPadding()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 200,
    height = 100,
    padding = { top = 10, right = 10, bottom = 10, left = 10 },
  })

  local padding = element:getScaledContentPadding()
  -- May be nil if no theme component with contentPadding
  if padding then
    luaunit.assertNotNil(padding.top)
    luaunit.assertNotNil(padding.right)
    luaunit.assertNotNil(padding.bottom)
    luaunit.assertNotNil(padding.left)
  end
end

-- Test suite for child management
TestElementChildren = {}

function TestElementChildren:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementChildren:tearDown()
  FlexLove.endFrame()
end

function TestElementChildren:test_addChild()
  local parent = FlexLove.new({
    id = "parent",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child",
    x = 10,
    y = 10,
    width = 50,
    height = 50,
  })

  parent:addChild(child)
  luaunit.assertEquals(#parent.children, 1)
  luaunit.assertEquals(parent.children[1], child)
  luaunit.assertEquals(child.parent, parent)
end

function TestElementChildren:test_removeChild()
  local parent = FlexLove.new({
    id = "parent",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child",
    x = 10,
    y = 10,
    width = 50,
    height = 50,
  })

  parent:addChild(child)
  parent:removeChild(child)

  luaunit.assertEquals(#parent.children, 0)
  luaunit.assertNil(child.parent)
end

function TestElementChildren:test_clearChildren()
  local parent = FlexLove.new({
    id = "parent",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
  })

  local child1 = FlexLove.new({ id = "child1", x = 0, y = 0, width = 50, height = 50 })
  local child2 = FlexLove.new({ id = "child2", x = 0, y = 0, width = 50, height = 50 })

  parent:addChild(child1)
  parent:addChild(child2)
  parent:clearChildren()

  luaunit.assertEquals(#parent.children, 0)
end

function TestElementChildren:test_getChildCount()
  local parent = FlexLove.new({
    id = "parent",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
  })

  local child1 = FlexLove.new({ id = "child1", x = 0, y = 0, width = 50, height = 50 })
  local child2 = FlexLove.new({ id = "child2", x = 0, y = 0, width = 50, height = 50 })

  parent:addChild(child1)
  parent:addChild(child2)

  luaunit.assertEquals(parent:getChildCount(), 2)
end

-- Test suite for element visibility and opacity
TestElementVisibility = {}

function TestElementVisibility:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementVisibility:tearDown()
  FlexLove.endFrame()
end

function TestElementVisibility:test_visibility_visible()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    visibility = "visible",
  })

  luaunit.assertEquals(element.visibility, "visible")
end

function TestElementVisibility:test_visibility_hidden()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    visibility = "hidden",
  })

  luaunit.assertEquals(element.visibility, "hidden")
end

function TestElementVisibility:test_opacity_default()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
  })

  luaunit.assertEquals(element.opacity, 1)
end

function TestElementVisibility:test_opacity_custom()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    opacity = 0.5,
  })

  luaunit.assertEquals(element.opacity, 0.5)
end

-- Test suite for text editing
TestElementTextEditing = {}

function TestElementTextEditing:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementTextEditing:tearDown()
  FlexLove.endFrame()
end

function TestElementTextEditing:test_editable_element()
  local element = FlexLove.new({
    id = "input",
    x = 0,
    y = 0,
    width = 200,
    height = 40,
    editable = true,
    text = "Edit me",
  })

  luaunit.assertTrue(element.editable)
  luaunit.assertNotNil(element._textEditor)
end

function TestElementTextEditing:test_placeholder_text()
  local element = FlexLove.new({
    id = "input",
    x = 0,
    y = 0,
    width = 200,
    height = 40,
    editable = true,
    placeholder = "Enter text...",
  })

  luaunit.assertEquals(element.placeholder, "Enter text...")
end

-- Test suite for additional element features
TestElementAdditional = {}

function TestElementAdditional:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementAdditional:tearDown()
  FlexLove.endFrame()
end

function TestElementAdditional:test_element_with_z_index()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    z = 10,
  })

  luaunit.assertEquals(element.z, 10)
end

function TestElementAdditional:test_element_with_text()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    text = "Hello World",
  })

  luaunit.assertEquals(element.text, "Hello World")
end

function TestElementAdditional:test_element_with_text_color()
  local Color = require("modules.Color")
  local textColor = Color.new(255, 0, 0, 1)

  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    text = "Red text",
    textColor = textColor,
  })

  luaunit.assertEquals(element.textColor, textColor)
end

function TestElementAdditional:test_element_with_background_color()
  local Color = require("modules.Color")
  local bgColor = Color.new(0, 0, 255, 1)

  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    backgroundColor = bgColor,
  })

  luaunit.assertEquals(element.backgroundColor, bgColor)
end

function TestElementAdditional:test_element_with_corner_radius()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    cornerRadius = 10,
  })

  luaunit.assertNotNil(element.cornerRadius)
  luaunit.assertEquals(element.cornerRadius.topLeft, 10)
  luaunit.assertEquals(element.cornerRadius.topRight, 10)
  luaunit.assertEquals(element.cornerRadius.bottomLeft, 10)
  luaunit.assertEquals(element.cornerRadius.bottomRight, 10)
end

function TestElementAdditional:test_element_with_margin()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    margin = { top = 5, right = 10, bottom = 5, left = 10 },
  })

  luaunit.assertNotNil(element.margin)
  luaunit.assertEquals(element.margin.top, 5)
  luaunit.assertEquals(element.margin.right, 10)
  luaunit.assertEquals(element.margin.bottom, 5)
  luaunit.assertEquals(element.margin.left, 10)
end

function TestElementAdditional:test_element_destroy()
  local parent = FlexLove.new({
    id = "parent",
    x = 0,
    y = 0,
    width = 200,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child",
    parent = parent,
    x = 0,
    y = 0,
    width = 50,
    height = 50,
  })

  luaunit.assertEquals(#parent.children, 1)
  child:destroy()
  luaunit.assertNil(child.parent)
end

function TestElementAdditional:test_element_with_disabled()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    disabled = true,
  })

  luaunit.assertTrue(element.disabled)
end

function TestElementAdditional:test_element_with_active()
  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    active = true,
  })

  luaunit.assertTrue(element.active)
end

function TestElementAdditional:test_element_with_userdata()
  local customData = { foo = "bar", count = 42 }

  local element = FlexLove.new({
    id = "test",
    x = 0,
    y = 0,
    width = 100,
    height = 100,
    userdata = customData,
  })

  luaunit.assertEquals(element.userdata, customData)
  luaunit.assertEquals(element.userdata.foo, "bar")
  luaunit.assertEquals(element.userdata.count, 42)
end

-- ==========================================
-- UNHAPPY PATH TESTS
-- ==========================================

TestElementUnhappyPaths = {}

function TestElementUnhappyPaths:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestElementUnhappyPaths:tearDown()
  FlexLove.endFrame()
end

-- Test: Element with missing deps parameter
function TestElementUnhappyPaths:test_element_with_init()
  -- Test that Element.new() works after FlexLove.init() is called
  -- Element now uses module-level dependencies initialized via Element.init()
  FlexLove.init() -- Ensure FlexLove is initialized
  local Element = require("modules.Element")
  local success = pcall(function()
    Element.new({})
  end)
  luaunit.assertTrue(success) -- Should work after Element.init() is called by FlexLove
end

-- Test: Element with negative dimensions
function TestElementUnhappyPaths:test_element_negative_dimensions()
  local element = FlexLove.new({
    id = "negative",
    x = 0,
    y = 0,
    width = -100,
    height = -50,
  })
  luaunit.assertNotNil(element)
  -- Element should still be created (negative values handled)
end

-- Test: Element with zero dimensions
function TestElementUnhappyPaths:test_element_zero_dimensions()
  local element = FlexLove.new({
    id = "zero",
    x = 0,
    y = 0,
    width = 0,
    height = 0,
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with invalid opacity values
function TestElementUnhappyPaths:test_element_invalid_opacity()
  -- Opacity > 1
  local success = pcall(function()
    FlexLove.new({
      id = "high_opacity",
      width = 100,
      height = 100,
      opacity = 2.5,
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateRange)

  -- Negative opacity
  success = pcall(function()
    FlexLove.new({
      id = "negative_opacity",
      width = 100,
      height = 100,
      opacity = -0.5,
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateRange)
end

-- Test: Element with invalid imageOpacity values
function TestElementUnhappyPaths:test_element_invalid_image_opacity()
  -- imageOpacity > 1
  local success = pcall(function()
    FlexLove.new({
      id = "high_img_opacity",
      width = 100,
      height = 100,
      imageOpacity = 3.0,
    })
  end)
  luaunit.assertFalse(success)

  -- Negative imageOpacity
  success = pcall(function()
    FlexLove.new({
      id = "negative_img_opacity",
      width = 100,
      height = 100,
      imageOpacity = -1.0,
    })
  end)
  luaunit.assertFalse(success)
end

-- Test: Element with invalid textSize
function TestElementUnhappyPaths:test_element_invalid_text_size()
  -- Zero textSize
  local success = pcall(function()
    FlexLove.new({
      id = "zero_text",
      width = 100,
      height = 100,
      textSize = 0,
    })
  end)
  luaunit.assertFalse(success)

  -- Negative textSize
  success = pcall(function()
    FlexLove.new({
      id = "negative_text",
      width = 100,
      height = 100,
      textSize = -12,
    })
  end)
  luaunit.assertFalse(success)
end

-- Test: Element with invalid textAlign enum
function TestElementUnhappyPaths:test_element_invalid_text_align()
  local success = pcall(function()
    FlexLove.new({
      id = "invalid_align",
      width = 100,
      height = 100,
      textAlign = "invalid_value",
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateEnum)
end

-- Test: Element with invalid positioning enum
function TestElementUnhappyPaths:test_element_invalid_positioning()
  local success = pcall(function()
    FlexLove.new({
      id = "invalid_pos",
      width = 100,
      height = 100,
      positioning = "invalid_positioning",
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateEnum)
end

-- Test: Element with invalid flexDirection enum
function TestElementUnhappyPaths:test_element_invalid_flex_direction()
  local success = pcall(function()
    FlexLove.new({
      id = "invalid_flex",
      width = 100,
      height = 100,
      positioning = "flex",
      flexDirection = "diagonal",
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateEnum)
end

-- Test: Element with invalid objectFit enum
function TestElementUnhappyPaths:test_element_invalid_object_fit()
  local success = pcall(function()
    FlexLove.new({
      id = "invalid_fit",
      width = 100,
      height = 100,
      objectFit = "stretch",
    })
  end)
  luaunit.assertFalse(success) -- Should error (validateEnum)
end

-- Test: Element with nonexistent image path
function TestElementUnhappyPaths:test_element_nonexistent_image()
  local element = FlexLove.new({
    id = "no_image",
    width = 100,
    height = 100,
    imagePath = "/nonexistent/path/to/image.png",
  })
  luaunit.assertNotNil(element)
  luaunit.assertNil(element._loadedImage) -- Image should fail to load silently
end

-- Test: Element with passwordMode and multiline (conflicting)
function TestElementUnhappyPaths:test_element_password_multiline_conflict()
  local element = FlexLove.new({
    id = "conflict",
    width = 200,
    height = 100,
    editable = true,
    passwordMode = true,
    multiline = true, -- Should be disabled by passwordMode
  })
  luaunit.assertNotNil(element)
  luaunit.assertFalse(element.multiline) -- multiline should be forced to false
end

-- Test: Element addChild with nil child
function TestElementUnhappyPaths:test_add_nil_child()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  local success = pcall(function()
    parent:addChild(nil)
  end)
  luaunit.assertFalse(success) -- Should error
end

-- Test: Element removeChild that doesn't exist
function TestElementUnhappyPaths:test_remove_nonexistent_child()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  local notAChild = FlexLove.new({
    id = "orphan",
    width = 50,
    height = 50,
  })

  parent:removeChild(notAChild) -- Should not crash
  luaunit.assertEquals(#parent.children, 0)
end

-- Test: Element removeChild with nil
function TestElementUnhappyPaths:test_remove_nil_child()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  parent:removeChild(nil) -- Should not crash
  luaunit.assertTrue(true)
end

-- Test: Element clearChildren on empty parent
function TestElementUnhappyPaths:test_clear_children_empty()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  parent:clearChildren() -- Should not crash
  luaunit.assertEquals(#parent.children, 0)
end

-- Test: Element clearChildren called twice
function TestElementUnhappyPaths:test_clear_children_twice()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child",
    width = 50,
    height = 50,
    parent = parent,
  })

  parent:clearChildren()
  parent:clearChildren() -- Call again
  luaunit.assertEquals(#parent.children, 0)
end

-- Test: Element contains with NaN coordinates
function TestElementUnhappyPaths:test_contains_nan_coordinates()
  local element = FlexLove.new({
    id = "test",
    x = 10,
    y = 20,
    width = 100,
    height = 50,
  })

  local nan = 0 / 0
  local result = element:contains(nan, nan)
  -- NaN comparisons return false, so this should be false
  luaunit.assertFalse(result)
end

-- Test: Element setScrollPosition without ScrollManager
function TestElementUnhappyPaths:test_scroll_without_manager()
  local element = FlexLove.new({
    id = "no_scroll",
    width = 100,
    height = 100,
    -- No overflow property, so no ScrollManager
  })

  element:setScrollPosition(50, 50) -- Should not crash
  luaunit.assertTrue(true)
end

-- Test: Element scrollBy with nil values
function TestElementUnhappyPaths:test_scroll_by_nil()
  local element = FlexLove.new({
    id = "scrollable",
    width = 200,
    height = 200,
    overflow = "scroll",
  })

  element:scrollBy(nil, nil) -- Should use current position
  luaunit.assertTrue(true)
end

-- Test: Element destroy on already destroyed element
function TestElementUnhappyPaths:test_destroy_twice()
  local element = FlexLove.new({
    id = "destroyable",
    width = 100,
    height = 100,
  })

  element:destroy()
  element:destroy() -- Call again - should not crash
  luaunit.assertTrue(true)
end

-- Test: Element destroy with circular reference (parent-child)
function TestElementUnhappyPaths:test_destroy_with_children()
  local parent = FlexLove.new({
    id = "parent",
    width = 200,
    height = 200,
  })

  local child = FlexLove.new({
    id = "child",
    width = 50,
    height = 50,
    parent = parent,
  })

  parent:destroy() -- Should destroy all children too
  luaunit.assertEquals(#parent.children, 0)
end

-- Test: Element update with nil dt
function TestElementUnhappyPaths:test_update_nil_dt()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
  })

  local success = pcall(function()
    element:update(nil)
  end)
  -- May or may not error depending on implementation
end

-- Test: Element update with negative dt
function TestElementUnhappyPaths:test_update_negative_dt()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
  })

  element:update(-0.016) -- Should not crash
  luaunit.assertTrue(true)
end

-- Test: Element draw with nil backdropCanvas
function TestElementUnhappyPaths:test_draw_nil_backdrop()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
  })

  element:draw(nil) -- Should not crash
  luaunit.assertTrue(true)
end

-- Test: Element with invalid cornerRadius types
function TestElementUnhappyPaths:test_invalid_corner_radius()
  -- String cornerRadius
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    cornerRadius = "invalid",
  })
  luaunit.assertNotNil(element)

  -- Negative cornerRadius
  element = FlexLove.new({
    id = "test2",
    width = 100,
    height = 100,
    cornerRadius = -10,
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with partial cornerRadius table
function TestElementUnhappyPaths:test_partial_corner_radius()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    cornerRadius = {
      topLeft = 10,
      -- Missing other corners
    },
  })
  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.cornerRadius.topLeft, 10)
  luaunit.assertEquals(element.cornerRadius.topRight, 0)
end

-- Test: Element with invalid border types
function TestElementUnhappyPaths:test_invalid_border()
  -- String border
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    border = "invalid",
  })
  luaunit.assertNotNil(element)

  -- Negative border
  element = FlexLove.new({
    id = "test2",
    width = 100,
    height = 100,
    border = -5,
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with partial border table
function TestElementUnhappyPaths:test_partial_border()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    border = {
      top = 2,
      left = 3,
      -- Missing right and bottom
    },
  })
  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.border.top, 2)
  luaunit.assertEquals(element.border.left, 3)
  luaunit.assertFalse(element.border.right)
  luaunit.assertFalse(element.border.bottom)
end

-- Test: Element with invalid padding types
function TestElementUnhappyPaths:test_invalid_padding()
  -- String padding
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    padding = "invalid",
  })
  luaunit.assertNotNil(element)

  -- Negative padding
  element = FlexLove.new({
    id = "test2",
    width = 100,
    height = 100,
    padding = { top = -10, left = -10, right = -10, bottom = -10 },
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with invalid margin types
function TestElementUnhappyPaths:test_invalid_margin()
  -- String margin
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
    margin = "invalid",
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with invalid gap value
function TestElementUnhappyPaths:test_invalid_gap()
  -- Negative gap
  local element = FlexLove.new({
    id = "test",
    width = 300,
    height = 200,
    positioning = "flex",
    gap = -10,
  })
  luaunit.assertNotNil(element)

  -- Negative rows/columns
  element = FlexLove.new({
    id = "test2",
    width = 300,
    height = 200,
    positioning = "grid",
    gridRows = -5,
    gridColumns = -5,
  })
  luaunit.assertNotNil(element)
end

-- Test: Element setText on non-text element
function TestElementUnhappyPaths:test_set_text_on_non_text()
  local element = FlexLove.new({
    id = "no_text",
    width = 100,
    height = 100,
  })

  element:setText("New text") -- Should not crash
  luaunit.assertEquals(element.text, "New text")
end

-- Test: Element setText with nil
function TestElementUnhappyPaths:test_set_text_nil()
  local element = FlexLove.new({
    id = "text",
    width = 100,
    height = 100,
    text = "Initial",
  })

  element:setText(nil)
  luaunit.assertNil(element.text)
end

-- Test: Element with conflicting size constraints
function TestElementUnhappyPaths:test_conflicting_size_constraints()
  -- Width less than padding
  local element = FlexLove.new({
    id = "conflict",
    width = 10,
    height = 10,
    padding = { top = 20, left = 20, right = 20, bottom = 20 },
  })
  luaunit.assertNotNil(element)
  -- Content width should be clamped to 0 or handled gracefully
end

-- Test: Element textinput on non-editable element
function TestElementUnhappyPaths:test_textinput_non_editable()
  local element = FlexLove.new({
    id = "not_editable",
    width = 100,
    height = 100,
    editable = false,
  })

  local success = pcall(function()
    element:textinput("a")
  end)
  -- Should either do nothing or handle gracefully
end

-- Test: Element keypressed on non-editable element
function TestElementUnhappyPaths:test_keypressed_non_editable()
  local element = FlexLove.new({
    id = "not_editable",
    width = 100,
    height = 100,
    editable = false,
  })

  local success = pcall(function()
    element:keypressed("return", "return", false)
  end)
  -- Should either do nothing or handle gracefully
end

-- Test: Element with invalid blur configuration
function TestElementUnhappyPaths:test_invalid_blur_config()
  -- Negative intensity
  local element = FlexLove.new({
    id = "blur",
    width = 100,
    height = 100,
    contentBlur = { intensity = -10, quality = 5 },
  })
  luaunit.assertNotNil(element)

  -- Intensity > 100
  element = FlexLove.new({
    id = "blur2",
    width = 100,
    height = 100,
    backdropBlur = { intensity = 150, quality = 5 },
  })
  luaunit.assertNotNil(element)

  -- Invalid quality
  element = FlexLove.new({
    id = "blur3",
    width = 100,
    height = 100,
    contentBlur = { intensity = 50, quality = 0 },
  })
  luaunit.assertNotNil(element)
end

-- Test: Element getAvailableContentWidth/Height on element with no padding
function TestElementUnhappyPaths:test_available_content_no_padding()
  local element = FlexLove.new({
    id = "test",
    width = 100,
    height = 100,
  })

  local availWidth = element:getAvailableContentWidth()
  local availHeight = element:getAvailableContentHeight()

  luaunit.assertEquals(availWidth, 100)
  luaunit.assertEquals(availHeight, 100)
end

-- Test: Element with maxLines but no multiline
function TestElementUnhappyPaths:test_max_lines_without_multiline()
  local element = FlexLove.new({
    id = "text",
    width = 200,
    height = 100,
    editable = true,
    multiline = false,
    maxLines = 5, -- Should be ignored for single-line
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with maxLength 0
function TestElementUnhappyPaths:test_max_length_zero()
  local element = FlexLove.new({
    id = "text",
    width = 200,
    height = 40,
    editable = true,
    maxLength = 0,
  })
  luaunit.assertNotNil(element)
end

-- Test: Element with negative maxLength
function TestElementUnhappyPaths:test_max_length_negative()
  local element = FlexLove.new({
    id = "text",
    width = 200,
    height = 40,
    editable = true,
    maxLength = -10,
  })
  luaunit.assertNotNil(element)
end

-- Test suite for convenience API features
TestConvenienceAPI = {}

function TestConvenienceAPI:setUp()
  FlexLove.beginFrame(1920, 1080)
end

function TestConvenienceAPI:tearDown()
  FlexLove.endFrame()
end

-- Test: flexDirection "row" converts to "horizontal"
function TestConvenienceAPI:test_flexDirection_row_converts()
  local element = FlexLove.new({
    id = "test_row",
    width = 200,
    height = 100,
    positioning = "flex",
    flexDirection = "row",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.flexDirection, "horizontal")
end

-- Test: flexDirection "column" converts to "vertical"
function TestConvenienceAPI:test_flexDirection_column_converts()
  local element = FlexLove.new({
    id = "test_column",
    width = 200,
    height = 100,
    positioning = "flex",
    flexDirection = "column",
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.flexDirection, "vertical")
end

-- Test: Single number padding expands to all sides
function TestConvenienceAPI:test_padding_single_number()
  local element = FlexLove.new({
    id = "test_padding_num",
    width = 200,
    height = 100,
    padding = 10,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.padding.top, 10)
  luaunit.assertEquals(element.padding.right, 10)
  luaunit.assertEquals(element.padding.bottom, 10)
  luaunit.assertEquals(element.padding.left, 10)
end

-- Test: Single string padding expands to all sides
function TestConvenienceAPI:test_padding_single_string()
  local element = FlexLove.new({
    id = "test_padding_str",
    width = 200,
    height = 100,
    padding = "5%",
  })

  luaunit.assertNotNil(element)
  -- All sides should be 5% of the element's dimensions
  -- For width: 5% of 200 = 10, for height: 5% of 100 = 5
  luaunit.assertEquals(element.padding.left, 10)
  luaunit.assertEquals(element.padding.right, 10)
  luaunit.assertEquals(element.padding.top, 5)
  luaunit.assertEquals(element.padding.bottom, 5)
end

-- Test: Single number margin expands to all sides
function TestConvenienceAPI:test_margin_single_number()
  local parent = FlexLove.new({
    id = "parent",
    width = 400,
    height = 300,
  })

  local element = FlexLove.new({
    id = "test_margin_num",
    parent = parent,
    width = 100,
    height = 100,
    margin = 15,
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.margin.top, 15)
  luaunit.assertEquals(element.margin.right, 15)
  luaunit.assertEquals(element.margin.bottom, 15)
  luaunit.assertEquals(element.margin.left, 15)
end

-- Test: Single string margin expands to all sides
function TestConvenienceAPI:test_margin_single_string()
  local parent = FlexLove.new({
    id = "parent",
    width = 400,
    height = 300,
  })

  local element = FlexLove.new({
    id = "test_margin_str",
    parent = parent,
    width = 100,
    height = 100,
    margin = "10%",
  })

  luaunit.assertNotNil(element)
  -- Margin percentages are relative to parent dimensions
  -- 10% of parent width 400 = 40, 10% of parent height 300 = 30
  luaunit.assertEquals(element.margin.left, 40)
  luaunit.assertEquals(element.margin.right, 40)
  luaunit.assertEquals(element.margin.top, 30)
  luaunit.assertEquals(element.margin.bottom, 30)
end

-- Test: Table padding still works (backward compatibility)
function TestConvenienceAPI:test_padding_table_still_works()
  local element = FlexLove.new({
    id = "test_padding_table",
    width = 200,
    height = 100,
    padding = { top = 5, right = 10, bottom = 15, left = 20 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.padding.top, 5)
  luaunit.assertEquals(element.padding.right, 10)
  luaunit.assertEquals(element.padding.bottom, 15)
  luaunit.assertEquals(element.padding.left, 20)
end

-- Test: Table margin still works (backward compatibility)
function TestConvenienceAPI:test_margin_table_still_works()
  local parent = FlexLove.new({
    id = "parent",
    width = 400,
    height = 300,
  })

  local element = FlexLove.new({
    id = "test_margin_table",
    parent = parent,
    width = 100,
    height = 100,
    margin = { top = 5, right = 10, bottom = 15, left = 20 },
  })

  luaunit.assertNotNil(element)
  luaunit.assertEquals(element.margin.top, 5)
  luaunit.assertEquals(element.margin.right, 10)
  luaunit.assertEquals(element.margin.bottom, 15)
  luaunit.assertEquals(element.margin.left, 20)
end

if not _G.RUNNING_ALL_TESTS then
  os.exit(luaunit.LuaUnit.run())
end