1 files changed, 55 insertions, 0 deletions
diff --git a/trunk/src/tests/page_heap_test.cc b/trunk/src/tests/page_heap_test.cc
new file mode 100644
index 0000000..9120b78
--- /dev/null
+++ b/trunk/src/tests/page_heap_test.cc
@@ -0,0 +1,55 @@
+// Copyright 2009 Google Inc. All Rights Reserved.
+// Author: fikes@google.com (Andrew Fikes)
+
+#include <stdio.h>
+#include "config_for_unittests.h"
+#include "base/logging.h"
+#include "common.h"
+#include "page_heap.h"
+
+namespace {
+
+static void CheckStats(const tcmalloc::PageHeap* ph,
+                       uint64_t system_pages,
+                       uint64_t free_pages,
+                       uint64_t unmapped_pages) {
+  tcmalloc::PageHeap::Stats stats = ph->stats();
+  EXPECT_EQ(system_pages, stats.system_bytes >> kPageShift);
+  EXPECT_EQ(free_pages, stats.free_bytes >> kPageShift);
+  EXPECT_EQ(unmapped_pages, stats.unmapped_bytes >> kPageShift);
+}
+
+static void TestPageHeap_Stats() {
+  tcmalloc::PageHeap* ph = new tcmalloc::PageHeap();
+
+  // Empty page heap
+  CheckStats(ph, 0, 0, 0);
+
+  // Allocate a span 's1'
+  tcmalloc::Span* s1 = ph->New(256);
+  CheckStats(ph, 256, 0, 0);
+
+  // Split span 's1' into 's1', 's2'.  Delete 's2'
+  tcmalloc::Span* s2 = ph->Split(s1, 128);
+  Length s2_len = s2->length;
+  ph->Delete(s2);
+  CheckStats(ph, 256, 128, 0);
+
+  // Unmap deleted span 's2'
+  EXPECT_EQ(s2_len, ph->ReleaseAtLeastNPages(1));
+  CheckStats(ph, 256, 0, 128);
+
+  // Delete span 's1'
+  ph->Delete(s1);
+  CheckStats(ph, 256, 128, 128);
+
+  delete ph;
+}
+
+}  // namespace
+
+int main(int argc, char **argv) {
+  TestPageHeap_Stats();
+  printf("PASS\n");
+  return 0;
+}