[trafficserver] 07/33: TS-4425: Add tests for Ptr.

[jp...@apache.org]

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commit 2a47b9fa42823d3fa01b147297da850602dc5d2a
Author: James Peach <jp...@apache.org>
AuthorDate: Sat May 7 14:24:12 2016 -0700

    TS-4425: Add tests for Ptr<T>.
---
 lib/ts/Makefile.am |  7 +++-
 lib/ts/test_Ptr.cc | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 99 insertions(+), 1 deletion(-)

diff --git a/lib/ts/Makefile.am b/lib/ts/Makefile.am
index cb0e076..da6d149 100644
--- a/lib/ts/Makefile.am
+++ b/lib/ts/Makefile.am
@@ -21,7 +21,8 @@ library_includedir=$(includedir)/ts
 library_include_HEADERS = apidefs.h
 
 noinst_PROGRAMS = mkdfa CompileParseRules
-check_PROGRAMS = test_arena test_atomic test_freelist test_geometry test_List test_Map test_Regex test_PriorityQueue test_Vec test_X509HostnameValidator
+check_PROGRAMS = test_arena test_atomic test_freelist test_geometry test_List test_Map test_Regex test_PriorityQueue test_Vec test_X509HostnameValidator test_Ptr
+
 TESTS = $(check_PROGRAMS)
 
 AM_CPPFLAGS = -I$(top_srcdir)/lib
@@ -235,6 +236,10 @@ test_X509HostnameValidator_SOURCES = test_X509HostnameValidator.cc
 test_X509HostnameValidator_LDADD = libtsutil.la @LIBTCL@ @LIBPCRE@ @OPENSSL_LIBS@
 test_X509HostnameValidator_LDFLAGS = @EXTRA_CXX_LDFLAGS@ @LIBTOOL_LINK_FLAGS@
 
+test_Ptr_SOURCES = test_Ptr.cc
+test_Ptr_LDADD = libtsutil.la @LIBTCL@ @LIBPCRE@
+test_Ptr_LDFLAGS = @EXTRA_CXX_LDFLAGS@ @LIBTOOL_LINK_FLAGS@
+
 CompileParseRules_SOURCES = CompileParseRules.cc
 
 test:: $(TESTS)
diff --git a/lib/ts/test_Ptr.cc b/lib/ts/test_Ptr.cc
new file mode 100644
index 0000000..3f7f826
--- /dev/null
+++ b/lib/ts/test_Ptr.cc
@@ -0,0 +1,93 @@
+/*
+
+  @section license License
+
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements.  See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership.  The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+#include "ts/Ptr.h"
+#include "ts/TestBox.h"
+
+struct PtrObject : RefCountObj {
+  PtrObject(unsigned *_c) : count(_c) { ++(*count); }
+  ~PtrObject() { --(*count); }
+  unsigned *count;
+};
+
+REGRESSION_TEST(Ptr_detach)(RegressionTest *t, int /* atype ATS_UNUSED */, int *pstatus)
+{
+  TestBox box(t, pstatus);
+  box = REGRESSION_TEST_PASSED;
+  unsigned alive = 0;
+
+  Ptr<PtrObject> p1 = make_ptr(new PtrObject(&alive));
+  PtrObject *p2 = p1.detach();
+
+  box.check(p1.get() == NULL, "Ptr<T>::detach NULLs the stored pointer");
+  box.check(p2->refcount() == 1, "Ptr<T>::detach preserves the refcount");
+
+  // Note that there's no symmetric reattach.
+  p1 = p2;
+  box.check(p2->refcount() == 2, "reattaching increments the refcount again");
+  p1->refcount_dec();
+}
+
+REGRESSION_TEST(Ptr_clear)(RegressionTest *t, int /* atype ATS_UNUSED */, int *pstatus)
+{
+  TestBox box(t, pstatus);
+  box = REGRESSION_TEST_PASSED;
+  unsigned alive = 0;
+
+  Ptr<PtrObject> p1 = make_ptr(new PtrObject(&alive));
+  box.check(alive == 1, "we have a live object");
+  p1.clear();
+  box.check(p1.get() == NULL, "Ptr<T>::clear NULLs the pointer");
+  box.check(alive == 0, "Ptr<T>::clear drops the refcount");
+
+  p1 = make_ptr(new PtrObject(&alive));
+  box.check(alive == 1, "we have a live object");
+  p1 = 0;
+  box.check(alive == 0, "assigning NULL drops the refcount");
+}
+
+REGRESSION_TEST(Ptr_refcount)(RegressionTest *t, int /* atype ATS_UNUSED */, int *pstatus)
+{
+  TestBox box(t, pstatus);
+  box = REGRESSION_TEST_PASSED;
+  unsigned alive = 0;
+
+  {
+    Ptr<PtrObject> p1 = make_ptr(new PtrObject(&alive));
+
+    box.check(p1->refcount() == 1, "initial refcount is 1");
+
+    Ptr<PtrObject> p2(p1);
+    box.check(p1->refcount() == 2, "initial refcount is 1");
+
+    Ptr<PtrObject> p3 = p1;
+  }
+
+  // Everything goes out of scope, so the refcounts should drop to zero.
+  box.check(alive == 0, "refcounts dropped");
+}
+
+int
+main(int /* argc ATS_UNUSED */, char ** /* argv ATS_UNUSED */)
+{
+  RegressionTest::run();
+  return RegressionTest::final_status == REGRESSION_TEST_PASSED ? 0 : 1;
+}

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