flex_test.go

package flex

import "testing"

func TestFlex_basis_flex_grow_column(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexGrow(1)
	rootChild0.StyleSetFlexBasis(50)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexGrow(1)
	root.InsertChild(rootChild1, 1)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 75, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 75, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 25, rootChild1.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 75, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 75, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 25, rootChild1.LayoutGetHeight())
}

func TestFlex_basis_flex_grow_row(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetFlexDirection(FlexDirectionRow)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexGrow(1)
	rootChild0.StyleSetFlexBasis(50)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexGrow(1)
	root.InsertChild(rootChild1, 1)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 75, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 75, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 25, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild1.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 25, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 75, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 25, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild1.LayoutGetHeight())
}

func TestFlex_basis_flex_shrink_column(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexShrink(1)
	rootChild0.StyleSetFlexBasis(100)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexBasis(50)
	root.InsertChild(rootChild1, 1)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild1.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild1.LayoutGetHeight())
}

func TestFlex_basis_flex_shrink_row(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetFlexDirection(FlexDirectionRow)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexShrink(1)
	rootChild0.StyleSetFlexBasis(100)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexBasis(50)
	root.InsertChild(rootChild1, 1)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 50, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild1.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 50, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 100, rootChild1.LayoutGetHeight())
}

func TestFlex_shrink_to_zero(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetHeight(75)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetWidth(50)
	rootChild0.StyleSetHeight(50)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexShrink(1)
	rootChild1.StyleSetWidth(50)
	rootChild1.StyleSetHeight(50)
	root.InsertChild(rootChild1, 1)

	rootChild2 := NewNodeWithConfig(config)
	rootChild2.StyleSetWidth(50)
	rootChild2.StyleSetHeight(50)
	root.InsertChild(rootChild2, 2)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 50, root.LayoutGetWidth())
	assertFloatEqual(t, 75, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild2.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 50, root.LayoutGetWidth())
	assertFloatEqual(t, 75, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 50, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 50, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 50, rootChild2.LayoutGetHeight())
}

func TestFlex_basis_overrides_main_size(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexGrow(1)
	rootChild0.StyleSetFlexBasis(50)
	rootChild0.StyleSetHeight(20)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexGrow(1)
	rootChild1.StyleSetHeight(10)
	root.InsertChild(rootChild1, 1)

	rootChild2 := NewNodeWithConfig(config)
	rootChild2.StyleSetFlexGrow(1)
	rootChild2.StyleSetHeight(10)
	root.InsertChild(rootChild2, 2)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 60, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 60, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 20, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 80, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 20, rootChild2.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 60, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 60, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 20, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 80, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 20, rootChild2.LayoutGetHeight())
}

func TestFlex_grow_shrink_at_most(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetWidth(100)
	root.StyleSetHeight(100)

	rootChild0 := NewNodeWithConfig(config)
	root.InsertChild(rootChild0, 0)

	rootChild0Child0 := NewNodeWithConfig(config)
	rootChild0Child0.StyleSetFlexGrow(1)
	rootChild0Child0.StyleSetFlexShrink(1)
	rootChild0.InsertChild(rootChild0Child0, 0)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0Child0.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 100, root.LayoutGetWidth())
	assertFloatEqual(t, 100, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetTop())
	assertFloatEqual(t, 100, rootChild0Child0.LayoutGetWidth())
	assertFloatEqual(t, 0, rootChild0Child0.LayoutGetHeight())
}

func TestFlex_grow_less_than_factor_one(t *testing.T) {
	config := NewConfig()

	root := NewNodeWithConfig(config)
	root.StyleSetWidth(200)
	root.StyleSetHeight(500)

	rootChild0 := NewNodeWithConfig(config)
	rootChild0.StyleSetFlexGrow(0.2)
	rootChild0.StyleSetFlexBasis(40)
	root.InsertChild(rootChild0, 0)

	rootChild1 := NewNodeWithConfig(config)
	rootChild1.StyleSetFlexGrow(0.2)
	root.InsertChild(rootChild1, 1)

	rootChild2 := NewNodeWithConfig(config)
	rootChild2.StyleSetFlexGrow(0.4)
	root.InsertChild(rootChild2, 2)
	CalculateLayout(root, Undefined, Undefined, DirectionLTR)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 200, root.LayoutGetWidth())
	assertFloatEqual(t, 500, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 132, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 132, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 92, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 224, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 184, rootChild2.LayoutGetHeight())

	CalculateLayout(root, Undefined, Undefined, DirectionRTL)

	assertFloatEqual(t, 0, root.LayoutGetLeft())
	assertFloatEqual(t, 0, root.LayoutGetTop())
	assertFloatEqual(t, 200, root.LayoutGetWidth())
	assertFloatEqual(t, 500, root.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild0.LayoutGetLeft())
	assertFloatEqual(t, 0, rootChild0.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild0.LayoutGetWidth())
	assertFloatEqual(t, 132, rootChild0.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild1.LayoutGetLeft())
	assertFloatEqual(t, 132, rootChild1.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild1.LayoutGetWidth())
	assertFloatEqual(t, 92, rootChild1.LayoutGetHeight())

	assertFloatEqual(t, 0, rootChild2.LayoutGetLeft())
	assertFloatEqual(t, 224, rootChild2.LayoutGetTop())
	assertFloatEqual(t, 200, rootChild2.LayoutGetWidth())
	assertFloatEqual(t, 184, rootChild2.LayoutGetHeight())
}