1 files changed, 103 insertions, 0 deletions
diff --git a/src/test/gather.cc b/src/test/gather.cc
new file mode 100644
index 000000000..496403625
--- /dev/null
+++ b/src/test/gather.cc
@@ -0,0 +1,103 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 Greg Farnum <gregory.farnum@dreamhost.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+#include "include/Context.h"
+#include "gtest/gtest.h"
+
+class C_Checker : public Context {
+public:
+  bool *finish_called;
+  int *result;
+  C_Checker(bool* _finish_called, int *r) :
+    finish_called(_finish_called), result(r) {}
+  void finish(int r) override { *finish_called = true; *result = r; }
+};
+
+TEST(ContextGather, Constructor) {
+  C_GatherBuilder gather(g_ceph_context);
+  EXPECT_FALSE(gather.has_subs());
+  EXPECT_TRUE(gather.get() == NULL);
+}
+
+TEST(ContextGather, OneSub) {
+  C_GatherBuilder gather(g_ceph_context);
+  Context *sub = gather.new_sub();
+  EXPECT_EQ(1, gather.num_subs_created());
+  EXPECT_EQ(1, gather.num_subs_remaining());
+
+  bool finish_called = false;
+  int result = 0;
+  C_Checker *checker = new C_Checker(&finish_called, &result);
+  gather.set_finisher(checker);
+  gather.activate();
+  sub->complete(0);
+  EXPECT_TRUE(finish_called);
+  EXPECT_EQ(0, result);
+}
+
+TEST(ContextGather, ManySubs) {
+  bool finish_called = false;
+  int result = 0;
+  C_GatherBuilder gather(g_ceph_context, new C_Checker(&finish_called, &result));
+  int sub_count = 8;
+  Context* subs[sub_count];
+  //create subs and test
+  for (int i = 0; i < sub_count; ++i) {
+    subs[i] = gather.new_sub();
+    EXPECT_EQ(i+1, gather.num_subs_created());
+    EXPECT_EQ(i+1, gather.num_subs_remaining());
+  }
+  EXPECT_TRUE(gather.has_subs());
+  gather.activate();
+
+  //finish all except one sub
+  for (int j = 0; j < sub_count - 1; ++j) {
+    subs[j]->complete(0);
+    EXPECT_FALSE(finish_called);
+  }
+
+  //finish last one and check asserts
+  subs[sub_count-1]->complete(0);
+  EXPECT_TRUE(finish_called);
+}
+
+TEST(ContextGather, AlternatingSubCreateFinish) {
+  C_GatherBuilder gather(g_ceph_context);
+  int sub_count = 8;
+  bool finish_called = false;
+  int result = 0;
+  C_Checker *checker = new C_Checker(&finish_called, &result);
+  gather.set_finisher(checker);
+  Context* subs[sub_count];
+
+  //create half the subs
+  for (int i = 0; i < sub_count / 2; ++i) {
+    subs[i] = gather.new_sub();
+    EXPECT_EQ(i + 1, gather.num_subs_created());
+    EXPECT_EQ(i + 1, gather.num_subs_remaining());
+  }
+
+  //alternate finishing first half of subs and creating last half of subs
+  for (int j = 0; j < sub_count / 2; ++j) {
+    subs[j]->complete(0);
+    subs[sub_count / 2 + j] = gather.new_sub();
+  }
+  gather.activate();
+
+  //finish last half of subs
+  for (int k = sub_count / 2; k < sub_count; ++k) {
+    subs[k]->complete(0);
+  }
+
+  EXPECT_TRUE(finish_called);
+}