tests/TArrayTest.cpp

/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkTArray.h"
#include "Test.h"

// Tests the SkTArray<T> class template.

template <bool MEM_COPY>
static void TestTSet_basic(skiatest::Reporter* reporter) {
    SkTArray<int, MEM_COPY> a;

    // Starts empty.
    REPORTER_ASSERT(reporter, a.empty());
    REPORTER_ASSERT(reporter, a.count() == 0);

    // { }, add a default constructed element
    a.push_back() = 0;
    REPORTER_ASSERT(reporter, !a.empty());
    REPORTER_ASSERT(reporter, a.count() == 1);

    // { 0 }, removeShuffle the only element.
    a.removeShuffle(0);
    REPORTER_ASSERT(reporter, a.empty());
    REPORTER_ASSERT(reporter, a.count() == 0);

    // { }, add a default, add a 1, remove first
    a.push_back() = 0;
    REPORTER_ASSERT(reporter, a.push_back() = 1);
    a.removeShuffle(0);
    REPORTER_ASSERT(reporter, !a.empty());
    REPORTER_ASSERT(reporter, a.count() == 1);
    REPORTER_ASSERT(reporter, a[0] == 1);

    // { 1 }, replace with new array
    int b[5] = { 0, 1, 2, 3, 4 };
    a.reset(b, SK_ARRAY_COUNT(b));
    REPORTER_ASSERT(reporter, a.count() == SK_ARRAY_COUNT(b));
    REPORTER_ASSERT(reporter, a[2] == 2);
    REPORTER_ASSERT(reporter, a[4] == 4);

    // { 0, 1, 2, 3, 4 }, removeShuffle the last
    a.removeShuffle(4);
    REPORTER_ASSERT(reporter, a.count() == SK_ARRAY_COUNT(b) - 1);
    REPORTER_ASSERT(reporter, a[3] == 3);

    // { 0, 1, 2, 3 }, remove a middle, note shuffle
    a.removeShuffle(1);
    REPORTER_ASSERT(reporter, a.count() == SK_ARRAY_COUNT(b) - 2);
    REPORTER_ASSERT(reporter, a[0] == 0);
    REPORTER_ASSERT(reporter, a[1] == 3);
    REPORTER_ASSERT(reporter, a[2] == 2);

    // {0, 3, 2 }
}

namespace {
SkTArray<int>* make() {
    typedef SkTArray<int> IntArray;
    return SkNEW(IntArray);
}

template <int N> SkTArray<int>* make_s() {
    typedef SkSTArray<N, int> IntArray;
    return SkNEW(IntArray);
}
}

static void test_swap(skiatest::Reporter* reporter) {
    typedef SkTArray<int>* (*ArrayMaker)();
    ArrayMaker arrayMakers[] = {make, make_s<5>, make_s<10>, make_s<20>};
    static int kSizes[] = {0, 1, 5, 10, 15, 20, 25};
    for (size_t arrayA = 0; arrayA < SK_ARRAY_COUNT(arrayMakers); ++arrayA) {
        for (size_t arrayB = arrayA; arrayB < SK_ARRAY_COUNT(arrayMakers); ++arrayB) {
            for (size_t dataSizeA = 0; dataSizeA < SK_ARRAY_COUNT(kSizes); ++dataSizeA) {
                for (size_t dataSizeB = 0; dataSizeB < SK_ARRAY_COUNT(kSizes); ++dataSizeB) {
                    int curr = 0;
                    SkTArray<int>* a = arrayMakers[arrayA]();
                    SkTArray<int>* b = arrayMakers[arrayB]();
                    for (int i = 0; i < kSizes[dataSizeA]; ++i) {
                        a->push_back(curr++);
                    }
                    for (int i = 0; i < kSizes[dataSizeB]; ++i) {
                        b->push_back(curr++);
                    }
                    a->swap(b);
                    REPORTER_ASSERT(reporter, kSizes[dataSizeA] == b->count());
                    REPORTER_ASSERT(reporter, kSizes[dataSizeB] == a->count());
                    curr = 0;
                    for (int i = 0; i < kSizes[dataSizeA]; ++i) {
                        REPORTER_ASSERT(reporter, curr++ == (*b)[i]);
                    }
                    for (int i = 0; i < kSizes[dataSizeB]; ++i) {
                        REPORTER_ASSERT(reporter, curr++ == (*a)[i]);
                    }
                    SkDELETE(b);

                    a->swap(a);
                    curr = kSizes[dataSizeA];
                    for (int i = 0; i < kSizes[dataSizeB]; ++i) {
                        REPORTER_ASSERT(reporter, curr++ == (*a)[i]);
                    }
                    SkDELETE(a);
                }
            }
        }
    }
}

DEF_TEST(TArray, reporter) {
    TestTSet_basic<true>(reporter);
    TestTSet_basic<false>(reporter);
    test_swap(reporter);
}