Improve doxygen and unittest coverage for API

Mainly focusing on hardening the tests for return values.

Author: michalpasztamobica

UNITTESTS/features/netsocket/EthernetInterface/test_EthernetInterface.cpp

@@ -117,6 +117,15 @@ class TestEthernetInterface: public testing::Test {
 TEST_F(TestEthernetInterface, constructor_default)
 {
     EXPECT_TRUE(iface);
+
+    // Test that this clas presents itself correctly
+    EXPECT_NE(nullptr, iface->ethInterface());
+    EXPECT_NE(nullptr, iface->emacInterface());
+
+    EXPECT_EQ(nullptr, iface->wifiInterface());
+    EXPECT_EQ(nullptr, iface->cellularBase());
+    EXPECT_EQ(nullptr, iface->cellularInterface());
+    EXPECT_EQ(nullptr, iface->meshInterface());
 }
 
 TEST_F(TestEthernetInterface, constructor_getter)
@@ -164,6 +173,9 @@ TEST_F(TestEthernetInterface, set_network)
     SocketAddress netmaskArg;
     SocketAddress gatewayArg;
 
+    // Before connecting return NULL
+    EXPECT_EQ(NULL, iface->get_mac_address());
+
     SocketAddress tmp;
     EXPECT_EQ(NSAPI_ERROR_NO_CONNECTION, iface->get_ip_address(&tmp));
     EXPECT_EQ(NSAPI_ERROR_NO_CONNECTION, iface->get_netmask(&tmp));
@@ -229,6 +241,45 @@ TEST_F(TestEthernetInterface, attach)
     iface->attach(cb);
 }
 
+
+TEST_F(TestEthernetInterface, get_interface_name)
+{
+    char name[100] = "eth0";
+    EXPECT_EQ(NULL, iface->get_interface_name(name));
+
+    doConnect();
+
+    // The parameter will be an internal variable.
+    EXPECT_CALL(*netStackIface, get_interface_name(_))
+    .Times(1)
+    .WillOnce(Return(name));
+    EXPECT_EQ(std::string(name), std::string(iface->get_interface_name(name)));
+}
+
+TEST_F(TestEthernetInterface, get_ipv6_link_local_address)
+{
+    SocketAddress addr("4.3.2.1");
+    EXPECT_EQ(NSAPI_ERROR_NO_CONNECTION, iface->get_ipv6_link_local_address(&addr));
+    EXPECT_EQ(std::string(addr.get_ip_address()), std::string("4.3.2.1"));
+    doConnect();
+
+    // The parameter will be an internal variable.
+    EXPECT_CALL(*netStackIface, get_ipv6_link_local_address(&addr))
+    .Times(1)
+    .WillOnce(Return(NSAPI_ERROR_OK));
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->get_ipv6_link_local_address(&addr));
+}
+
+TEST_F(TestEthernetInterface, set_as_default)
+{
+    doConnect();
+
+    EXPECT_CALL(*stackMock, set_default_interface(netStackIface))
+    .Times(1);
+    iface->set_as_default();
+}
+
+
 TEST_F(TestEthernetInterface, set_dhcp)
 {
     EXPECT_EQ(NSAPI_ERROR_OK, iface->set_dhcp(false));

UNITTESTS/features/netsocket/NetworkInterface/test_NetworkInterface.cpp

@@ -148,6 +148,12 @@ TEST_F(TestNetworkInterface, set_blocking)
     EXPECT_EQ(iface->set_blocking(true), NSAPI_ERROR_UNSUPPORTED);
 }
 
+TEST_F(TestNetworkInterface, get_ipv6_link_local_address)
+{
+    SocketAddress a;
+    EXPECT_EQ(iface->get_ipv6_link_local_address(&a), NSAPI_ERROR_UNSUPPORTED);
+}
+
 void my_iface_callback(nsapi_event_t e, intptr_t i)
 {
     (void)e;

UNITTESTS/features/netsocket/PPPInterface/test_PPPInterface.cpp

@@ -0,0 +1,293 @@
+/*
+ * Copyright (c) 2018, Arm Limited and affiliates
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed 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 "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+#include "OnboardNetworkStack_mock.h"
+
+#include "features/netsocket/PPPInterface.h"
+#include <iostream>
+#include "FileHandle_stub.h"
+
+
+OnboardNetworkStack &OnboardNetworkStack::get_default_instance()
+{
+    return OnboardNetworkStackMock::get_instance();
+}
+
+using ::testing::_;
+using ::testing::Return;
+using ::testing::ReturnArg;
+using ::testing::SaveArg;
+using ::testing::SaveArgPointee;
+using ::testing::SetArrayArgument;
+using ::testing::SetArgPointee;
+using ::testing::SetArgReferee;
+
+class MockPPP : public PPP {
+public:
+    MOCK_METHOD0(power_up, bool());
+    MOCK_METHOD0(power_down, void());
+    MOCK_METHOD0(get_mtu_size, uint32_t());
+    MOCK_CONST_METHOD0(get_align_preference, uint32_t());
+    MOCK_CONST_METHOD2(get_ifname, void(char *name, uint8_t size));
+    MOCK_METHOD2(link_out, bool(net_stack_mem_buf_t *buf, nsapi_ip_stack_t ip_stack));
+    MOCK_METHOD1(set_stream, void(mbed::FileHandle *stream));
+    MOCK_METHOD1(set_ip_stack, void(nsapi_ip_stack_t ip_stack));
+    MOCK_METHOD2(set_credentials, void(const char *uname, const char *password));
+    MOCK_METHOD1(get_ip_address, const nsapi_addr_t *(nsapi_version_t version));
+    MOCK_METHOD0(get_netmask, const nsapi_addr_t *());
+    MOCK_METHOD0(get_gateway, const nsapi_addr_t *());
+    MOCK_METHOD1(get_dns_server, const nsapi_addr_t *(uint8_t index));
+    MOCK_METHOD1(set_link_input_cb, void(ppp_link_input_cb_t input_cb));
+    MOCK_METHOD1(set_link_state_cb, void(ppp_link_state_change_cb_t state_cb));
+    MOCK_METHOD1(set_memory_manager, void(NetStackMemoryManager &mem_mngr));
+
+    static MockPPP &get_instance()
+    {
+        static MockPPP pppMock1;
+        return pppMock1;
+    }
+};
+
+MBED_WEAK PPP &PPP::get_default_instance()
+{
+    return MockPPP::get_instance();
+}
+
+class TestPPPInterface: public testing::Test {
+protected:
+    PPPInterface *iface;
+    OnboardNetworkStackMock *stackMock;
+    MockPPP *pppMock;
+    OnboardNetworkStackMock::InterfaceMock *netStackIface;
+    virtual void SetUp()
+    {
+        stackMock = &OnboardNetworkStackMock::get_instance();
+        pppMock = &MockPPP::get_instance();
+        netStackIface = &OnboardNetworkStackMock::InterfaceMock::get_instance();
+        iface = new PPPInterface(MockPPP::get_instance(), OnboardNetworkStackMock::get_instance());
+    }
+
+    virtual void TearDown()
+    {
+        // Do not delete the mocks pointers, as they point to statically allocated singletons.
+        delete iface;
+    }
+
+    /* Enclose the heavily-used connection procedure to improve code redability */
+    void doConnect(bool blocking = true)
+    {
+        EXPECT_CALL(*pppMock, set_stream(_));
+        EXPECT_CALL(*pppMock, set_ip_stack(_));
+        EXPECT_CALL(*pppMock, set_credentials(_, _));
+        EXPECT_CALL(*stackMock, add_ppp_interface(testing::Ref(*pppMock), true, _))
+        .Times(1)
+        .WillOnce(DoAll(SetArgPointee<2>(netStackIface), Return(NSAPI_ERROR_OK)));
+        EXPECT_CALL(*netStackIface, attach(_))
+        .Times(1)
+        .RetiresOnSaturation();
+        EXPECT_CALL(*netStackIface, bringup(false, NULL, NULL, NULL, DEFAULT_STACK, blocking))
+        .Times(1)
+        .WillOnce(Return(NSAPI_ERROR_OK));
+        EXPECT_EQ(NSAPI_ERROR_OK, iface->connect());
+    }
+
+    static void cb(nsapi_event_t ev, intptr_t ptr)
+    {
+
+    }
+};
+
+TEST_F(TestPPPInterface, constructor_default)
+{
+    EXPECT_TRUE(iface);
+    // Test that this clas presents itself correctly
+    EXPECT_NE(nullptr, iface->pppInterface());
+
+    EXPECT_EQ(nullptr, iface->emacInterface());
+    EXPECT_EQ(nullptr, iface->ethInterface());
+    EXPECT_EQ(nullptr, iface->wifiInterface());
+    EXPECT_EQ(nullptr, iface->cellularBase());
+    EXPECT_EQ(nullptr, iface->cellularInterface());
+    EXPECT_EQ(nullptr, iface->meshInterface());
+}
+
+TEST_F(TestPPPInterface, connect)
+{
+    mbed::FileHandle_stub handle;
+    nsapi_ip_stack_t stack = IPV4_STACK;
+    iface->set_credentials("uname", "passwd");
+    iface->set_stream(&handle);
+    iface->set_ip_stack(stack);
+
+    EXPECT_CALL(*pppMock, set_stream(&handle));
+    EXPECT_CALL(*pppMock, set_ip_stack(stack));
+    EXPECT_CALL(*pppMock, set_credentials("uname", "passwd"));
+    EXPECT_CALL(*stackMock, add_ppp_interface(testing::Ref(*pppMock), true, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<2>(netStackIface), Return(NSAPI_ERROR_OK)));
+    EXPECT_CALL(*netStackIface, attach(_))
+    .Times(1)
+    .RetiresOnSaturation();
+    EXPECT_CALL(*netStackIface, bringup(false, NULL, NULL, NULL, stack, true))
+    .Times(1)
+    .WillOnce(Return(NSAPI_ERROR_OK));
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->connect());
+}
+
+TEST_F(TestPPPInterface, connect_failure)
+{
+    EXPECT_CALL(*pppMock, set_stream(_));
+    EXPECT_CALL(*pppMock, set_ip_stack(_));
+    EXPECT_CALL(*pppMock, set_credentials(_, _));
+    EXPECT_CALL(*stackMock, add_ppp_interface(testing::Ref(*pppMock), true, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<2>(netStackIface), Return(NSAPI_ERROR_NO_MEMORY)));
+    EXPECT_EQ(NSAPI_ERROR_NO_MEMORY, iface->connect());
+}
+
+TEST_F(TestPPPInterface, disconnect_without_connecting)
+{
+    EXPECT_EQ(NSAPI_ERROR_NO_CONNECTION, iface->disconnect());
+}
+
+TEST_F(TestPPPInterface, disconnect)
+{
+    doConnect();
+
+    EXPECT_CALL(*netStackIface, bringdown())
+    .Times(1)
+    .WillOnce(Return(NSAPI_ERROR_OK));
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->disconnect());
+}
+
+TEST_F(TestPPPInterface, set_network)
+{
+    char ipAddress[NSAPI_IPv4_SIZE] = "127.0.0.1";
+    char netmask[NSAPI_IPv4_SIZE] = "255.255.0.0";
+    char gateway[NSAPI_IPv4_SIZE] = "127.0.0.2";
+
+    const char *ipAddressArg;
+    const char *netmaskArg;
+    const char *gatewayArg;
+
+    EXPECT_EQ(0, iface->get_ip_address());
+    EXPECT_EQ(0, iface->get_netmask());
+    EXPECT_EQ(0, iface->get_gateway());
+
+    EXPECT_CALL(*pppMock, set_stream(_));
+    EXPECT_CALL(*pppMock, set_ip_stack(_));
+    EXPECT_CALL(*pppMock, set_credentials(_, _));
+
+    // Set the network data
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->set_network(ipAddress, netmask, gateway));
+
+    // Now the bringup should have different arguments. We can't use doConnect method.
+    EXPECT_CALL(*stackMock, add_ppp_interface(testing::Ref(*pppMock), true, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<2>(netStackIface), Return(NSAPI_ERROR_OK)));
+    EXPECT_CALL(*netStackIface, attach(_))
+    .Times(1)
+    .RetiresOnSaturation();
+    // Do not put the expected char * arguments, as they are pointers and would not match
+    EXPECT_CALL(*netStackIface, bringup(false, _, _, _, DEFAULT_STACK, true))
+    .Times(1)
+    .WillOnce(DoAll(SaveArg<1>(&ipAddressArg),
+                    SaveArg<2>(&netmaskArg),
+                    SaveArg<3>(&gatewayArg),
+                    Return(NSAPI_ERROR_OK)));
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->connect());
+    // Check the contents of the stored pointer arguments.
+    EXPECT_TRUE(0 == strcmp(ipAddress, ipAddressArg));
+    EXPECT_TRUE(0 == strcmp(netmask, netmaskArg));
+    EXPECT_TRUE(0 == strcmp(gateway, gatewayArg));
+
+    // Testing the getters makes sense now.
+    EXPECT_CALL(*netStackIface, get_ip_address(_, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<0>(*ipAddress), Return(ipAddress)));
+    EXPECT_EQ(std::string(ipAddress), std::string(iface->get_ip_address()));
+
+    EXPECT_CALL(*netStackIface, get_netmask(_, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<0>(*netmask), Return(netmask)));
+    EXPECT_EQ(std::string(netmask), std::string(iface->get_netmask()));
+
+    EXPECT_CALL(*netStackIface, get_gateway(_, _))
+    .Times(1)
+    .WillOnce(DoAll(SetArgPointee<0>(*gateway), Return(gateway)));
+    EXPECT_EQ(std::string(gateway), std::string(iface->get_gateway()));
+}
+
+TEST_F(TestPPPInterface, get_connection_status)
+{
+    EXPECT_EQ(NSAPI_STATUS_DISCONNECTED, iface->get_connection_status());
+
+    doConnect();
+
+    EXPECT_CALL(*netStackIface, get_connection_status())
+    .Times(1)
+    .WillOnce(Return(NSAPI_STATUS_LOCAL_UP));
+    EXPECT_EQ(NSAPI_STATUS_LOCAL_UP, iface->get_connection_status());
+}
+
+TEST_F(TestPPPInterface, get_interface_name)
+{
+    char name[100];
+    memset(name, '\0', 100);
+    EXPECT_EQ(NULL, iface->get_interface_name(name));
+
+    doConnect();
+
+    EXPECT_EQ(NULL, iface->get_interface_name(name));
+
+    EXPECT_CALL(*netStackIface, get_interface_name(name))
+    .Times(1)
+    .WillOnce(Return(name));
+    EXPECT_EQ(name, iface->get_interface_name(name));
+}
+
+TEST_F(TestPPPInterface, set_as_default)
+{
+    doConnect();
+
+    EXPECT_CALL(*stackMock, set_default_interface(netStackIface))
+    .Times(1);
+    iface->set_as_default();
+}
+
+TEST_F(TestPPPInterface, attach)
+{
+    doConnect();
+    EXPECT_CALL(*netStackIface, attach(_)) // TODO: check that the correct function is passed.
+    .Times(1);
+    iface->attach(cb);
+}
+
+TEST_F(TestPPPInterface, set_dhcp)
+{
+    EXPECT_EQ(NSAPI_ERROR_UNSUPPORTED, iface->set_dhcp(false));
+    doConnect(true);
+}
+
+TEST_F(TestPPPInterface, set_blocking)
+{
+    EXPECT_EQ(NSAPI_ERROR_OK, iface->set_blocking(false));
+    doConnect(false);
+}