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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This is a GPU-backend specific test
#if SK_SUPPORT_GPU
#include "GrRedBlackTree.h"
#include "SkRandom.h"
#include "Test.h"
typedef GrRedBlackTree<int> Tree;
DEF_TEST(GrRedBlackTree, reporter) {
Tree tree;
SkRandom r;
int count[100] = {0};
// add 10K ints
for (int i = 0; i < 10000; ++i) {
int x = r.nextU() % 100;
Tree::Iter xi = tree.insert(x);
REPORTER_ASSERT(reporter, *xi == x);
++count[x];
}
tree.insert(0);
++count[0];
tree.insert(99);
++count[99];
REPORTER_ASSERT(reporter, *tree.begin() == 0);
REPORTER_ASSERT(reporter, *tree.last() == 99);
REPORTER_ASSERT(reporter, --(++tree.begin()) == tree.begin());
REPORTER_ASSERT(reporter, --tree.end() == tree.last());
REPORTER_ASSERT(reporter, tree.count() == 10002);
int c = 0;
// check that we iterate through the correct number of
// elements and they are properly sorted.
for (Tree::Iter a = tree.begin(); tree.end() != a; ++a) {
Tree::Iter b = a;
++b;
++c;
REPORTER_ASSERT(reporter, b == tree.end() || *a <= *b);
}
REPORTER_ASSERT(reporter, c == tree.count());
// check that the tree reports the correct number of each int
// and that we can iterate through them correctly both forward
// and backward.
for (int i = 0; i < 100; ++i) {
int c;
c = tree.countOf(i);
REPORTER_ASSERT(reporter, c == count[i]);
c = 0;
Tree::Iter iter = tree.findFirst(i);
while (iter != tree.end() && *iter == i) {
++c;
++iter;
}
REPORTER_ASSERT(reporter, count[i] == c);
c = 0;
iter = tree.findLast(i);
if (iter != tree.end()) {
do {
if (*iter == i) {
++c;
} else {
break;
}
if (iter != tree.begin()) {
--iter;
} else {
break;
}
} while (true);
}
REPORTER_ASSERT(reporter, c == count[i]);
}
// remove all the ints between 25 and 74. Randomly chose to remove
// the first, last, or any entry for each.
for (int i = 25; i < 75; ++i) {
while (0 != tree.countOf(i)) {
--count[i];
int x = r.nextU() % 3;
Tree::Iter iter;
switch (x) {
case 0:
iter = tree.findFirst(i);
break;
case 1:
iter = tree.findLast(i);
break;
case 2:
default:
iter = tree.find(i);
break;
}
tree.remove(iter);
}
REPORTER_ASSERT(reporter, 0 == count[i]);
REPORTER_ASSERT(reporter, tree.findFirst(i) == tree.end());
REPORTER_ASSERT(reporter, tree.findLast(i) == tree.end());
REPORTER_ASSERT(reporter, tree.find(i) == tree.end());
}
// remove all of the 0 entries. (tests removing begin())
REPORTER_ASSERT(reporter, *tree.begin() == 0);
REPORTER_ASSERT(reporter, *(--tree.end()) == 99);
while (0 != tree.countOf(0)) {
--count[0];
tree.remove(tree.find(0));
}
REPORTER_ASSERT(reporter, 0 == count[0]);
REPORTER_ASSERT(reporter, tree.findFirst(0) == tree.end());
REPORTER_ASSERT(reporter, tree.findLast(0) == tree.end());
REPORTER_ASSERT(reporter, tree.find(0) == tree.end());
REPORTER_ASSERT(reporter, 0 < *tree.begin());
// remove all the 99 entries (tests removing last()).
while (0 != tree.countOf(99)) {
--count[99];
tree.remove(tree.find(99));
}
REPORTER_ASSERT(reporter, 0 == count[99]);
REPORTER_ASSERT(reporter, tree.findFirst(99) == tree.end());
REPORTER_ASSERT(reporter, tree.findLast(99) == tree.end());
REPORTER_ASSERT(reporter, tree.find(99) == tree.end());
REPORTER_ASSERT(reporter, 99 > *(--tree.end()));
REPORTER_ASSERT(reporter, tree.last() == --tree.end());
// Make sure iteration still goes through correct number of entries
// and is still sorted correctly.
c = 0;
for (Tree::Iter a = tree.begin(); tree.end() != a; ++a) {
Tree::Iter b = a;
++b;
++c;
REPORTER_ASSERT(reporter, b == tree.end() || *a <= *b);
}
REPORTER_ASSERT(reporter, c == tree.count());
// repeat check that correct number of each entry is in the tree
// and iterates correctly both forward and backward.
for (int i = 0; i < 100; ++i) {
REPORTER_ASSERT(reporter, tree.countOf(i) == count[i]);
int c = 0;
Tree::Iter iter = tree.findFirst(i);
while (iter != tree.end() && *iter == i) {
++c;
++iter;
}
REPORTER_ASSERT(reporter, count[i] == c);
c = 0;
iter = tree.findLast(i);
if (iter != tree.end()) {
do {
if (*iter == i) {
++c;
} else {
break;
}
if (iter != tree.begin()) {
--iter;
} else {
break;
}
} while (true);
}
REPORTER_ASSERT(reporter, count[i] == c);
}
// remove all entries
while (!tree.empty()) {
tree.remove(tree.begin());
}
// test reset on empty tree.
tree.reset();
}
#endif
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