add tests for mount and unmount boot root filesystem

1 files changed, 63 insertions, 0 deletions

diff --git a/kernel/src/filesystem/vfs.tests.cpp b/kernel/src/filesystem/vfs.tests.cpp
index add96aa..0f1d6d5 100644
--- a/kernel/src/filesystem/vfs.tests.cpp
+++ b/kernel/src/filesystem/vfs.tests.cpp
@@ -148,6 +148,69 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "VFS
       REQUIRE(mounted_monkey != nullptr);
     }
 
+    THEN("image can be mounted on / file opened and unmounted again")
+    {
+      auto info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 != nullptr);
+
+      REQUIRE(vfs.do_mount("/dev/ram16", "/") == kernel::filesystem::vfs::operation_result::success);
+
+      info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 == nullptr);
+
+      auto water = vfs.open("/monkey_house/infrastructure/water.txt");
+      REQUIRE(water != nullptr);
+
+      REQUIRE(vfs.unmount("/") == kernel::filesystem::vfs::operation_result::success);
+
+      info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 != nullptr);
+    }
+
+    THEN("image can be mounted on / just the boot root has /dev")
+    {
+      auto info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 != nullptr);
+
+      REQUIRE(vfs.do_mount("/dev/ram16", "/") == kernel::filesystem::vfs::operation_result::success);
+
+      info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 == nullptr);
+
+      auto water = vfs.open("/monkey_house/infrastructure/water.txt");
+      REQUIRE(water != nullptr);
+
+      auto dev_ram_16 = vfs.open("/dev/ram16");
+      REQUIRE(dev_ram_16 == nullptr);
+
+      REQUIRE(vfs.do_mount("/dev/ram32", "/") == kernel::filesystem::vfs::operation_result::non_existent_path);
+
+      REQUIRE(vfs.unmount("/") == kernel::filesystem::vfs::operation_result::success);
+
+      auto dev_ram_32 = vfs.open("/dev/ram32");
+      REQUIRE(dev_ram_32 != nullptr);
+    }
+
+    THEN("boot root can be unmounted and remounted again but /dev is not re-grafted")
+    {
+      auto info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 != nullptr);
+
+      REQUIRE(vfs.unmount("/dev") == kernel::filesystem::vfs::operation_result::success);
+      REQUIRE(vfs.unmount("/") == kernel::filesystem::vfs::operation_result::success);
+
+      info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 == nullptr);
+
+      REQUIRE(vfs.do_mount("/dev/ram0", "/") == kernel::filesystem::vfs::operation_result::success);
+
+      info_1 = vfs.open("/information/info_1.txt");
+      REQUIRE(info_1 != nullptr);
+
+      auto dev_ram_0 = vfs.open("/dev/ram0");
+      REQUIRE(dev_ram_0 == nullptr);
+    }
+
     THEN("mount with null file system fails")
     {
       REQUIRE(vfs.do_mount("/closed.txt", "/information") ==