add PagedBuffer; use own main() for tests

test/src/main.cc

@@ -0,0 +1,9 @@
+#include "gtest/gtest.h"
+#include "System.h"
+
+int main(int argc, char * argv[])
+{
+    ::testing::InitGoogleTest(&argc, argv);
+    System::init();
+    return RUN_ALL_TESTS();
+}

test/src/test_PagedBuffer.cc

@@ -0,0 +1,45 @@
+#include "gtest/gtest.h"
+#include "PagedBuffer.h"
+
+struct X
+{
+    uint64_t a;
+    uint32_t b;
+    uint32_t c;
+};
+
+struct Y
+{
+    uint32_t a;
+    uint32_t b;
+};
+
+TEST(PagedBufferTest, empty_paged_buffer_has_size_0)
+{
+    PagedBuffer<X> pbx;
+    ASSERT_EQ(0u, pbx.size());
+
+    PagedBuffer<Y> pby;
+    ASSERT_EQ(0u, pby.size());
+}
+
+TEST(PagedBufferTest, allows_adding_elements)
+{
+    PagedBuffer<X> pbx;
+
+    for (uint32_t i = 0u; i < 1000u; i++)
+    {
+        X x = {i, 2u * i, 4u * i};
+        pbx[i] = x;
+    }
+
+    ASSERT_GE(pbx.size(), 1000u);
+
+    for (uint32_t i = 0u; i < 1000u; i++)
+    {
+        const X & x = pbx[i];
+        ASSERT_EQ(i, x.a);
+        ASSERT_EQ(2u * i, x.b);
+        ASSERT_EQ(4u * i, x.c);
+    }
+}