1 files changed, 116 insertions, 0 deletions
diff --git a/tests/ArenaAllocTest.cpp b/tests/ArenaAllocTest.cpp
new file mode 100644
index 0000000000..647ea25283
--- /dev/null
+++ b/tests/ArenaAllocTest.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Test.h"
+#include "SkArenaAlloc.h"
+
+namespace {
+
+    static int created, destroyed;
+
+    struct Foo {
+        Foo() : x(-2), y(-3.0f) { created++; }
+        Foo(int X, float Y) : x(X), y(Y) { created++; }
+        ~Foo() { destroyed++; }
+
+        int x;
+        float y;
+    };
+
+    struct Big {
+        Big() {}
+        uint32_t array[128];
+    };
+
+}
+
+struct WithDtor {
+    ~WithDtor() { }
+};
+
+DEF_TEST(ArenaAlloc, r) {
+
+    {
+        created = 0;
+        destroyed = 0;
+
+        SkArenaAlloc arena{nullptr, 0};
+        REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+        Foo* foo = arena.make<Foo>(3, 4.0f);
+        REPORTER_ASSERT(r, foo->x == 3);
+        REPORTER_ASSERT(r, foo->y == 4.0f);
+        REPORTER_ASSERT(r, created == 1);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.makeArrayDefault<int>(10);
+        int* zeroed = arena.makeArray<int>(10);
+        for (int i = 0; i < 10; i++) {
+            REPORTER_ASSERT(r, zeroed[i] == 0);
+        }
+        Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+        REPORTER_ASSERT(r, fooArray[3].x == -2);
+        REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+        REPORTER_ASSERT(r, created == 11);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.make<typename std::aligned_storage<10,8>::type>();
+    }
+    REPORTER_ASSERT(r, created == 11);
+    REPORTER_ASSERT(r, destroyed == 11);
+
+    {
+        created = 0;
+        destroyed = 0;
+        char block[1024];
+        SkArenaAlloc arena{block};
+
+        REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+        Foo* foo = arena.make<Foo>(3, 4.0f);
+        REPORTER_ASSERT(r, foo->x == 3);
+        REPORTER_ASSERT(r, foo->y == 4.0f);
+        REPORTER_ASSERT(r, created == 1);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.makeArrayDefault<int>(10);
+        int* zeroed = arena.makeArray<int>(10);
+        for (int i = 0; i < 10; i++) {
+            REPORTER_ASSERT(r, zeroed[i] == 0);
+        }
+        Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+        REPORTER_ASSERT(r, fooArray[3].x == -2);
+        REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+        REPORTER_ASSERT(r, created == 11);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.make<typename std::aligned_storage<10,8>::type>();
+    }
+    REPORTER_ASSERT(r, created == 11);
+    REPORTER_ASSERT(r, destroyed == 11);
+
+    {
+        created = 0;
+        destroyed = 0;
+        std::unique_ptr<char[]> block{new char[1024]};
+        SkArenaAlloc arena{block.get(), 1024};
+
+        REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+        Foo* foo = arena.make<Foo>(3, 4.0f);
+        REPORTER_ASSERT(r, foo->x == 3);
+        REPORTER_ASSERT(r, foo->y == 4.0f);
+        REPORTER_ASSERT(r, created == 1);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.makeArrayDefault<int>(10);
+        int* zeroed = arena.makeArray<int>(10);
+        for (int i = 0; i < 10; i++) {
+            REPORTER_ASSERT(r, zeroed[i] == 0);
+        }
+        Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+        REPORTER_ASSERT(r, fooArray[3].x == -2);
+        REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+        REPORTER_ASSERT(r, created == 11);
+        REPORTER_ASSERT(r, destroyed == 0);
+        arena.make<typename std::aligned_storage<10,8>::type>();
+    }
+    REPORTER_ASSERT(r, created == 11);
+    REPORTER_ASSERT(r, destroyed == 11);
+}