Add some unit tests

Makefile

@@ -1,11 +1,15 @@
 
 CXXFLAGS = -Wall -O3 -Iinclude
 
-TARGETS = local_lat remote_lat local_thr remote_thr
+TARGETS = local_lat remote_lat local_thr remote_thr tests
 
 all: $(TARGETS)
 
 $(TARGETS): include/nmq.hpp
+tests: LDFLAGS += -lgtest -lpthread
+
+test: tests
+	@./tests
 
 clean:
 	rm -f *~ core

README

@@ -12,7 +12,7 @@ context switches.
 Building
 --------
 
-Just run make. Requires recent GCC.
+Just run make. Requires recent GCC. Tests require Google Test.
 
 Performance
 -----------

TODO

@@ -4,4 +4,5 @@
   * Ping nodes to check if they are running
 * Unit tests
 * Maybe allow zero length messages
-* Magic and versioning of mmap file
+* Magic and version of mmap() file
+* Support context using mkstemp() for in process communication and testing

include/nmq.hpp

@@ -207,7 +207,7 @@ class context_t {
 
     size_t recv_size;
     memcpy(&recv_size, d, sizeof(size_t));
-    assert(recv_size >= *size && "buffer too small");
+    assert(recv_size <= *size && "buffer too small");
     *size = recv_size;
     memcpy(msg, d + sizeof(size_t), recv_size);
 

tests.cpp

@@ -0,0 +1,61 @@
+/*
+    Copyright (C) 2010 Erik Rigtorp <erik@rigtorp.com>. 
+    All rights reserved.
+
+    This file is part of NanoMQ.
+
+    NanoMQ is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    NanoMQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with NanoMQ.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <gtest/gtest.h>
+#include <nmq.hpp>
+
+TEST(Tests, Test) {
+
+  // Open context
+  char *fname = tempnam(NULL, "nmq"); // UGLY
+  ASSERT_NE(NULL, (size_t)fname);
+  nmq::context_t context(fname);
+  ASSERT_TRUE(context.create(4, 10, 100));
+
+  nmq::node_t node0(context, 0);
+  nmq::node_t node1(context, 1);
+  nmq::node_t node2(context, 2);
+  nmq::node_t node3(context, 3);
+
+  char buf[100];
+  size_t sz = 100;
+  node0.send(1, "test", 5);
+  node1.recv(0, &buf, &sz);
+  EXPECT_EQ(5, sz);
+  EXPECT_STREQ("test", buf);  
+
+  node0.send(2, "test", 5);
+  node2.recv(0, &buf, &sz);
+  EXPECT_EQ(5, sz);
+  EXPECT_STREQ("test", buf);  
+
+  node0.send(3, "test", 5);
+  node3.recv(0, &buf, &sz);
+  EXPECT_EQ(5, sz);
+  EXPECT_STREQ("test", buf);
+
+  ASSERT_EQ(0, unlink(fname));
+}
+
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}