Add a test for IdleTimerController.

Bug: 28362720
Test: bullhead builds,boots
Test: netd_{unit,integration}_test pass
Change-Id: I0e3c2462676969b26a4cbee7aa6552078fde90f5
diff --git a/server/Android.mk b/server/Android.mk
index d924c84..c902e9e 100644
--- a/server/Android.mk
+++ b/server/Android.mk
@@ -167,7 +167,7 @@
         IptablesRestoreController.cpp IptablesRestoreControllerTest.cpp \
         BandwidthController.cpp BandwidthControllerTest.cpp \
         FirewallControllerTest.cpp FirewallController.cpp \
-        IdletimerController.cpp \
+        IdletimerController.cpp IdletimerControllerTest.cpp \
         NatControllerTest.cpp NatController.cpp \
         NetlinkCommands.cpp NetlinkManager.cpp \
         RouteController.cpp RouteControllerTest.cpp \
diff --git a/server/IdletimerController.cpp b/server/IdletimerController.cpp
index e6306fd..224dec6 100644
--- a/server/IdletimerController.cpp
+++ b/server/IdletimerController.cpp
@@ -95,6 +95,7 @@
 
 #define LOG_NDEBUG 0
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <sys/socket.h>
@@ -116,6 +117,8 @@
 const char* IdletimerController::LOCAL_RAW_PREROUTING = "idletimer_raw_PREROUTING";
 const char* IdletimerController::LOCAL_MANGLE_POSTROUTING = "idletimer_mangle_POSTROUTING";
 
+auto IdletimerController::execFunction = android_fork_execvp;
+
 IdletimerController::IdletimerController() {
 }
 
@@ -127,11 +130,11 @@
 
     // Running for IPv4
     argv[0] = IPTABLES_PATH;
-    resIpv4 = android_fork_execvp(argc, (char **)argv, NULL, false, false);
+    resIpv4 = execFunction(argc, (char **)argv, NULL, false, false);
 
     // Running for IPv6
     argv[0] = IP6TABLES_PATH;
-    resIpv6 = android_fork_execvp(argc, (char **)argv, NULL, false, false);
+    resIpv6 = execFunction(argc, (char **)argv, NULL, false, false);
 
 #if !LOG_NDEBUG
     std::string full_cmd = argv[0];
diff --git a/server/IdletimerController.h b/server/IdletimerController.h
index 98a312e..33abdb6 100644
--- a/server/IdletimerController.h
+++ b/server/IdletimerController.h
@@ -16,6 +16,8 @@
 #ifndef _IDLETIMER_CONTROLLER_H
 #define _IDLETIMER_CONTROLLER_H
 
+#include <stdint.h>
+
 class IdletimerController {
 public:
 
@@ -39,6 +41,9 @@
     int runIpxtablesCmd(int argc, const char **cmd);
     int modifyInterfaceIdletimer(IptOp op, const char *iface, uint32_t timeout,
                                  const char *classLabel);
+
+    friend class IdletimerControllerTest;
+    static int (*execFunction)(int, char **, int *, bool, bool);
 };
 
 #endif
diff --git a/server/IdletimerControllerTest.cpp b/server/IdletimerControllerTest.cpp
new file mode 100644
index 0000000..51f19e3
--- /dev/null
+++ b/server/IdletimerControllerTest.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ *
+ * IdletimerControllerTest.cpp - unit tests for IdletimerController.cpp
+ */
+
+#include <gtest/gtest.h>
+
+#include <android-base/strings.h>
+#include <android-base/stringprintf.h>
+
+#include "IdletimerController.h"
+#include "IptablesBaseTest.h"
+
+using android::base::StringPrintf;
+
+class IdletimerControllerTest : public IptablesBaseTest {
+protected:
+    IdletimerControllerTest() {
+        IdletimerController::execFunction = fake_android_fork_exec;
+    }
+    IdletimerController mIt;
+};
+
+TEST_F(IdletimerControllerTest, TestSetupIptablesHooks) {
+    mIt.setupIptablesHooks();
+    expectIptablesCommands(ExpectedIptablesCommands{});
+    expectIptablesRestoreCommands(ExpectedIptablesCommands{});
+}
+
+TEST_F(IdletimerControllerTest, TestEnableDisable) {
+    std::vector<std::string> expected = {
+        "-t raw -F idletimer_raw_PREROUTING",
+        "-t mangle -F idletimer_mangle_POSTROUTING",
+    };
+
+    mIt.enableIdletimerControl();
+    expectIptablesCommands(expected);
+
+    mIt.enableIdletimerControl();
+    expectIptablesCommands(expected);
+
+    mIt.disableIdletimerControl();
+    expectIptablesCommands(expected);
+
+    mIt.disableIdletimerControl();
+    expectIptablesCommands(expected);
+}
+
+const std::vector<std::string> makeAddRemoveCommands(bool add) {
+    const char *op = add ? "-A" : "-D";
+    return {
+        StringPrintf("-t raw %s idletimer_raw_PREROUTING -i wlan0 -j IDLETIMER"
+                     " --timeout 12345 --label hello --send_nl_msg 1", op),
+        StringPrintf("-t mangle %s idletimer_mangle_POSTROUTING -o wlan0 -j IDLETIMER"
+                     " --timeout 12345 --label hello --send_nl_msg 1", op),
+    };
+}
+
+TEST_F(IdletimerControllerTest, TestAddRemove) {
+    auto expected = makeAddRemoveCommands(true);
+    mIt.addInterfaceIdletimer("wlan0", 12345, "hello");
+    expectIptablesCommands(expected);
+
+    mIt.addInterfaceIdletimer("wlan0", 12345, "hello");
+    expectIptablesCommands(expected);
+
+    expected = makeAddRemoveCommands(false);
+    mIt.removeInterfaceIdletimer("wlan0", 12345, "hello");
+    expectIptablesCommands(expected);
+
+    mIt.removeInterfaceIdletimer("wlan0", 12345, "hello");
+    expectIptablesCommands(expected);
+}