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recompute_heap_test.go
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recompute_heap_test.go
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package incr
import (
"testing"
"github.com/wcharczuk/go-incr/testutil"
)
func Test_recomputeHeap_add(t *testing.T) {
g := New()
rh := newRecomputeHeap(32)
n50 := newHeightIncr(g, 5)
n60 := newHeightIncr(g, 6)
n70 := newHeightIncr(g, 7)
rh.add(n50)
// assertions post add n50
{
testutil.Equal(t, 1, rh.len())
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, true, rh.has(n50))
testutil.Equal(t, false, rh.has(n60))
testutil.Equal(t, false, rh.has(n70))
testutil.Equal(t, 5, rh.minHeight)
testutil.Equal(t, 5, rh.maxHeight)
}
rh.add(n60)
// assertions post add n60
{
testutil.Equal(t, 2, rh.len())
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, 1, rh.heights[6].len())
testutil.Equal(t, true, rh.has(n50))
testutil.Equal(t, true, rh.has(n50))
testutil.Equal(t, false, rh.has(n70))
testutil.Equal(t, 5, rh.minHeight)
testutil.Equal(t, 6, rh.maxHeight)
}
rh.add(n70)
// assertions post add n70
{
testutil.Equal(t, 3, rh.len())
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, 1, rh.heights[6].len())
testutil.Equal(t, 1, rh.heights[7].len())
testutil.Equal(t, true, rh.has(n50))
testutil.Equal(t, true, rh.has(n60))
testutil.Equal(t, true, rh.has(n70))
testutil.Equal(t, 5, rh.minHeight)
testutil.Equal(t, 7, rh.maxHeight)
}
}
func iterToArray[A any](fn func() (A, bool)) (output []A) {
value, ok := fn()
for ok {
output = append(output, value)
value, ok = fn()
}
return output
}
func Test_recomputeHeap_setIterToMinHeight(t *testing.T) {
g := New()
rh := newRecomputeHeap(10)
n00 := newHeightIncr(g, 0)
n01 := newHeightIncr(g, 0)
n02 := newHeightIncr(g, 0)
n10 := newHeightIncr(g, 1)
n11 := newHeightIncr(g, 1)
n12 := newHeightIncr(g, 1)
n13 := newHeightIncr(g, 1)
n50 := newHeightIncr(g, 5)
n51 := newHeightIncr(g, 5)
n52 := newHeightIncr(g, 5)
n53 := newHeightIncr(g, 5)
n54 := newHeightIncr(g, 5)
rh.add(n00)
rh.add(n01)
rh.add(n02)
rh.add(n10)
rh.add(n11)
rh.add(n12)
rh.add(n13)
rh.add(n50)
rh.add(n51)
rh.add(n52)
rh.add(n53)
rh.add(n54)
testutil.Equal(t, 12, rh.len())
testutil.Equal(t, 0, rh.minHeight)
testutil.Equal(t, 5, rh.maxHeight)
var iter recomputeHeapListIter
var iterValues []INode
rh.setIterToMinHeight(&iter)
iterValues = iterToArray(iter.Next)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 9, rh.len())
testutil.Equal(t, 3, len(iterValues))
testutil.Equal(t, 0, rh.heights[0].len())
testutil.Equal(t, 4, rh.heights[1].len())
testutil.Equal(t, 5, rh.heights[5].len())
for _, n := range iterValues {
testutil.NotNil(t, n)
testutil.Nil(t, n.Node().nextInRecomputeHeap)
testutil.Nil(t, n.Node().previousInRecomputeHeap)
}
testutil.Equal(t, 1, rh.minHeight)
testutil.Equal(t, 5, rh.maxHeight)
rh.setIterToMinHeight(&iter)
iterValues = iterToArray(iter.Next)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 5, rh.len())
testutil.Equal(t, 4, len(iterValues))
testutil.Equal(t, 0, rh.heights[0].len())
testutil.Equal(t, 0, rh.heights[1].len())
testutil.Equal(t, 5, rh.heights[5].len())
for _, n := range iterValues {
testutil.NotNil(t, n)
testutil.Nil(t, n.Node().nextInRecomputeHeap)
testutil.Nil(t, n.Node().previousInRecomputeHeap)
}
rh.setIterToMinHeight(&iter)
iterValues = iterToArray(iter.Next)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 0, rh.len())
testutil.Equal(t, 5, len(iterValues))
testutil.Equal(t, 0, rh.heights[0].len())
testutil.Equal(t, 0, rh.heights[1].len())
testutil.Equal(t, 0, rh.heights[5].len())
for _, n := range iterValues {
testutil.NotNil(t, n)
testutil.Nil(t, n.Node().nextInRecomputeHeap)
testutil.Nil(t, n.Node().previousInRecomputeHeap)
}
rh.add(n50)
rh.add(n51)
rh.add(n52)
rh.add(n53)
rh.add(n54)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 5, rh.len())
testutil.Equal(t, 5, rh.minHeight)
testutil.Equal(t, 5, rh.maxHeight)
rh.setIterToMinHeight(&iter)
iterValues = iterToArray(iter.Next)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 0, rh.len())
testutil.Equal(t, 5, len(iterValues))
testutil.Equal(t, 0, rh.heights[0].len())
testutil.Equal(t, 0, rh.heights[1].len())
testutil.Equal(t, 0, rh.heights[5].len())
for _, n := range iterValues {
testutil.NotNil(t, n)
testutil.Nil(t, n.Node().nextInRecomputeHeap)
testutil.Nil(t, n.Node().previousInRecomputeHeap)
}
}
func Test_recomputeHeap_remove(t *testing.T) {
g := New()
rh := newRecomputeHeap(10)
n10 := newHeightIncr(g, 1)
n11 := newHeightIncr(g, 1)
n20 := newHeightIncr(g, 2)
n21 := newHeightIncr(g, 2)
n22 := newHeightIncr(g, 2)
n30 := newHeightIncr(g, 3)
rh.add(n10)
rh.add(n11)
rh.add(n20)
rh.add(n21)
rh.add(n22)
rh.add(n30)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, true, rh.has(n10))
testutil.Equal(t, true, rh.has(n11))
testutil.Equal(t, true, rh.has(n20))
testutil.Equal(t, true, rh.has(n21))
testutil.Equal(t, true, rh.has(n22))
testutil.Equal(t, true, rh.has(n30))
rh.remove(n21)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 5, rh.len())
testutil.Equal(t, true, rh.has(n10))
testutil.Equal(t, true, rh.has(n11))
testutil.Equal(t, true, rh.has(n20))
testutil.Equal(t, false, rh.has(n21))
for _, h := range rh.heights {
if h == nil {
continue
}
testutil.Equal(t, false, h.has(n21.n.id))
}
testutil.Equal(t, true, rh.has(n22))
testutil.Equal(t, true, rh.has(n30))
testutil.Equal(t, 2, rh.heights[2].len())
rh.remove(n10)
rh.remove(n11)
testutil.Nil(t, rh.sanityCheck())
testutil.Equal(t, 3, rh.len())
testutil.Equal(t, 0, rh.heights[1].len())
testutil.Equal(t, 2, rh.minHeight)
testutil.Equal(t, 3, rh.maxHeight)
for _, h := range rh.heights {
if h == nil {
continue
}
testutil.Equal(t, false, h.has(n10.n.id))
}
for _, h := range rh.heights {
if h == nil {
continue
}
testutil.Equal(t, false, h.has(n11.n.id))
}
}
func Test_recomputeHeap_nextMinHeightUnsafe_noItems(t *testing.T) {
rh := new(recomputeHeap)
rh.minHeight = 1
rh.maxHeight = 3
next := rh.nextMinHeightUnsafe()
testutil.Equal(t, 0, next)
}
func Test_recomputeHeap_maybeAddNewHeightsUnsafe(t *testing.T) {
rh := newRecomputeHeap(8)
testutil.Equal(t, 8, len(rh.heights))
rh.maybeAddNewHeightsUnsafe(9) // we use (1) indexing!
testutil.Equal(t, 10, len(rh.heights))
}
func Test_recomputeHeap_add_adjustsHeights(t *testing.T) {
g := New()
rh := newRecomputeHeap(8)
testutil.Equal(t, 8, len(rh.heights))
v0 := newHeightIncr(g, 32)
rh.add(v0)
testutil.Equal(t, 33, len(rh.heights))
testutil.Equal(t, 32, rh.minHeight)
testutil.Equal(t, 32, rh.maxHeight)
v1 := newHeightIncr(g, 64)
rh.add(v1)
testutil.Equal(t, 65, len(rh.heights))
testutil.Equal(t, 32, rh.minHeight)
testutil.Equal(t, 64, rh.maxHeight)
}
func Test_recomputeHeap_fix(t *testing.T) {
g := New()
rh := newRecomputeHeap(8)
v0 := newHeightIncr(g, 2)
rh.add(v0)
v1 := newHeightIncr(g, 3)
rh.add(v1)
v2 := newHeightIncr(g, 4)
rh.add(v2)
testutil.Equal(t, 2, rh.minHeight)
testutil.Equal(t, 1, rh.heights[2].len())
testutil.Equal(t, 1, rh.heights[3].len())
testutil.Equal(t, 1, rh.heights[4].len())
testutil.Equal(t, 4, rh.maxHeight)
v0.n.height = 1
rh.fix(v0)
testutil.Equal(t, 1, rh.minHeight)
testutil.Equal(t, 1, rh.heights[1].len())
testutil.Equal(t, 0, rh.heights[2].len())
testutil.Equal(t, 1, rh.heights[3].len())
testutil.Equal(t, 1, rh.heights[4].len())
testutil.Equal(t, 4, rh.maxHeight)
rh.fix(v0)
testutil.Equal(t, 1, rh.minHeight)
testutil.Equal(t, 1, rh.heights[1].len())
testutil.Equal(t, 0, rh.heights[2].len())
testutil.Equal(t, 1, rh.heights[3].len())
testutil.Equal(t, 1, rh.heights[4].len())
testutil.Equal(t, 4, rh.maxHeight)
v2.n.height = 5
rh.fix(v2)
testutil.Equal(t, 1, rh.minHeight)
testutil.Equal(t, 1, rh.heights[1].len())
testutil.Equal(t, 0, rh.heights[2].len())
testutil.Equal(t, 1, rh.heights[3].len())
testutil.Equal(t, 0, rh.heights[4].len())
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, 5, rh.maxHeight)
}
func Test_recomputeHeap_sanityCheck_badMinHeight(t *testing.T) {
g := New()
rh := newRecomputeHeap(8)
n_2_00 := newMockBareNodeWithHeight(g, 2)
n_2_01 := newMockBareNodeWithHeight(g, 2)
rh.add(n_2_00)
rh.add(n_2_01)
rh.minHeight = 1
err := rh.sanityCheck()
testutil.NotNil(t, err)
}
func Test_recomputeHeap_sanityCheck_badItemHeight(t *testing.T) {
g := New()
rh := newRecomputeHeap(8)
n_1_00 := newMockBareNodeWithHeight(g, 1)
n_2_00 := newMockBareNodeWithHeight(g, 2)
n_2_01 := newMockBareNodeWithHeight(g, 2)
n_3_00 := newMockBareNodeWithHeight(g, 3)
n_3_01 := newMockBareNodeWithHeight(g, 3)
n_3_02 := newMockBareNodeWithHeight(g, 3)
height2 := newList(n_2_00, n_2_01)
rh.heights = []*recomputeHeapList{
nil,
newList(n_1_00),
height2,
newList(n_3_00, n_3_01, n_3_02),
}
n_2_00.Node().heightInRecomputeHeap = 1
err := rh.sanityCheck()
testutil.NotNil(t, err)
}
func Test_recomputeHeap_sanityCheck_badHeightInRecomputeHeap(t *testing.T) {
g := New()
rh := newRecomputeHeap(8)
n_1_00 := newMockBareNodeWithHeight(g, 1)
n_2_00 := newMockBareNodeWithHeight(g, 2)
n_2_01 := newMockBareNodeWithHeight(g, 2)
n_3_00 := newMockBareNodeWithHeight(g, 3)
n_3_01 := newMockBareNodeWithHeight(g, 3)
n_3_02 := newMockBareNodeWithHeight(g, 3)
height2 := newList(n_2_00, n_2_01)
rh.heights = []*recomputeHeapList{
nil,
newList(n_1_00),
height2,
newList(n_3_00, n_3_01, n_3_02),
}
n_2_00.Node().height = 1
err := rh.sanityCheck()
testutil.NotNil(t, err)
}
func Test_recomputeHeap_clear(t *testing.T) {
g := New()
rh := newRecomputeHeap(32)
n50 := newHeightIncr(g, 5)
n60 := newHeightIncr(g, 6)
n70 := newHeightIncr(g, 7)
rh.add(n50)
rh.add(n60)
rh.add(n70)
testutil.NotEqual(t, HeightUnset, n50.n.heightInRecomputeHeap)
testutil.NotEqual(t, HeightUnset, n60.n.heightInRecomputeHeap)
testutil.NotEqual(t, HeightUnset, n70.n.heightInRecomputeHeap)
testutil.Equal(t, 3, rh.numItems)
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, 1, rh.heights[6].len())
testutil.Equal(t, 1, rh.heights[7].len())
testutil.Equal(t, 5, rh.minHeight)
testutil.Equal(t, 7, rh.maxHeight)
rh.clear()
testutil.Equal(t, HeightUnset, n50.n.heightInRecomputeHeap)
testutil.Equal(t, HeightUnset, n60.n.heightInRecomputeHeap)
testutil.Equal(t, HeightUnset, n70.n.heightInRecomputeHeap)
testutil.Equal(t, 0, rh.numItems)
testutil.Equal(t, 0, rh.heights[5].len())
testutil.Equal(t, 0, rh.heights[6].len())
testutil.Equal(t, 0, rh.heights[7].len())
testutil.Equal(t, 0, rh.minHeight)
testutil.Equal(t, 0, rh.maxHeight)
rh.add(n50)
rh.add(n60)
rh.add(n70)
testutil.NotEqual(t, HeightUnset, n50.n.heightInRecomputeHeap)
testutil.NotEqual(t, HeightUnset, n60.n.heightInRecomputeHeap)
testutil.NotEqual(t, HeightUnset, n70.n.heightInRecomputeHeap)
testutil.Equal(t, 3, rh.numItems)
testutil.Equal(t, 1, rh.heights[5].len())
testutil.Equal(t, 1, rh.heights[6].len())
testutil.Equal(t, 1, rh.heights[7].len())
testutil.Equal(t, 7, rh.maxHeight)
}
func Test_recomputeHeap_removeMinUnsafe(t *testing.T) {
g := New()
rh := newRecomputeHeap(10)
n00 := newHeightIncr(g, 0)
n01 := newHeightIncr(g, 0)
n02 := newHeightIncr(g, 0)
n10 := newHeightIncr(g, 1)
n11 := newHeightIncr(g, 1)
n12 := newHeightIncr(g, 1)
n13 := newHeightIncr(g, 1)
n50 := newHeightIncr(g, 5)
n51 := newHeightIncr(g, 5)
n52 := newHeightIncr(g, 5)
n53 := newHeightIncr(g, 5)
n54 := newHeightIncr(g, 5)
rh.add(n00)
rh.add(n01)
rh.add(n02)
rh.add(n10)
rh.add(n11)
rh.add(n12)
rh.add(n13)
rh.add(n50)
rh.add(n51)
rh.add(n52)
rh.add(n53)
rh.add(n54)
node, ok := rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n00.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n01.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n02.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n10.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n11.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n12.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n13.Node().id, node.Node().id)
rh.add(n10)
rh.add(n11)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n10.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n11.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n50.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n51.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n52.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n53.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, true, ok)
testutil.Equal(t, n54.Node().id, node.Node().id)
node, ok = rh.removeMinUnsafe()
testutil.Equal(t, false, ok)
testutil.Nil(t, node)
}