add test for mknod

CMakeLists.txt

@@ -83,6 +83,7 @@ if(NOT(WITHOUT_TEST))
         test-src/integration/test_fsync.cpp
         test-src/integration/test_utimens.cpp
         test-src/integration/test_open.cpp
+        test-src/integration/test_mknod.cpp
     )
 
     target_include_directories(integration_tests PRIVATE test-src/integration ${GTEST_INCLUDE_DIRS} ${GMOCK_INCLUDE_DIRS})

src/webfuse/provider.cpp

@@ -91,6 +91,9 @@ public:
             case request_type::open:
                 fs_open(reader, writer);
                 break;
+            case request_type::mknod:
+                fs_mknod(reader, writer);
+                break;
             case request_type::create:
                 fs_create(reader, writer);
                 break;
@@ -236,6 +239,16 @@ private:
         } 
     }
 
+    void fs_mknod(messagereader & reader, messagewriter & writer)
+    {
+        auto const path = reader.read_str();
+        auto const mode = reader.read_mode();
+        auto const dev = reader.read_u32();
+
+        auto const result = fs_.mknod(path, mode, dev);
+        writer.write_i32(result);
+    }
+
     void fs_create(messagereader & reader, messagewriter & writer)
     {
         auto const path = reader.read_str();

test-src/integration/test_mknod.cpp

@@ -0,0 +1,52 @@
+#include "webfuse/webfuse.hpp"
+#include "webfuse/test/fixture.hpp"
+#include "webfuse/test/filesystem_mock.hpp"
+
+#include <gtest/gtest.h>
+#include <fcntl.h>
+#include <sys/sysmacros.h>
+
+using testing::_;
+using testing::Return;
+using testing::Invoke;
+using testing::AnyNumber;
+using testing::AtMost;
+
+TEST(mknod, success)
+{
+    bool file_created = false;
+
+    webfuse::filesystem_mock fs;
+    EXPECT_CALL(fs, access("/",_)).Times(AnyNumber()).WillRepeatedly(Return(0));
+    EXPECT_CALL(fs, getattr(_,_)).WillRepeatedly(Invoke([&file_created](std::string const & path, struct stat * attr){
+        memset(reinterpret_cast<void*>(attr),0, sizeof(struct stat));
+
+        if (path == "/")
+        {
+            attr->st_nlink = 1;
+            attr->st_mode = S_IFDIR | 0755;
+            return 0;
+        }
+        else if ((path == "/some_dev") && (file_created))
+        {
+            attr->st_nlink = 1;
+            attr->st_mode = S_IFIFO | 0644;
+            attr->st_size = 0;
+            return 0;
+        }
+        else
+        {
+            return -ENOENT;
+        }
+    }));
+    EXPECT_CALL(fs, mknod("/some_dev", _, _)).Times(AtMost(1)).WillOnce(Invoke([&file_created](auto const &, auto, auto ){
+        file_created = true;
+        return 0;
+    }));
+    EXPECT_CALL(fs, release("/some_dev", _)).Times(AtMost(1)).WillOnce(Return(0));
+
+    webfuse::fixture fixture(fs);
+    auto const path = fixture.get_path() + "/some_dev";
+
+    ASSERT_EQ(0, ::mkfifo(path.c_str(), 0644));
+}