Add test for SkTArray.

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
+    REPORTER_ASSERT(reporter, a.push_back());
+    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
+    REPORTER_ASSERT(reporter, a.push_back());
+    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 }
+}
+
+DEF_TEST(TArray, reporter) {
+    TestTSet_basic<true>(reporter);
+    TestTSet_basic<false>(reporter);
+}