diff options
Diffstat (limited to 'kernel/src/filesystem/mount.tests.cpp')
| -rw-r--r-- | kernel/src/filesystem/mount.tests.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/src/filesystem/mount.tests.cpp b/kernel/src/filesystem/mount.tests.cpp index 58e9bab..e7dd709 100644 --- a/kernel/src/filesystem/mount.tests.cpp +++ b/kernel/src/filesystem/mount.tests.cpp @@ -29,6 +29,7 @@ SCENARIO("Mount construction", "[filesystem][mount]") REQUIRE(mount.get_root_dentry() == root_dentry); REQUIRE(mount.get_mount_dentry() == root_dentry); REQUIRE(mount.get_mount_path() == "/"); + REQUIRE(mount.is_ready_to_unmount()); } THEN("the mount has no parent mount") @@ -47,3 +48,44 @@ SCENARIO("Mount construction", "[filesystem][mount]") } } } + +SCENARIO("Mount reference counting", "[filesystem][mount]") +{ + GIVEN("a filesystem and a root dentry") + { + auto fs = kstd::make_shared<kernel::tests::filesystem::filesystem>(); + auto root_inode = kstd::make_shared<kernel::tests::filesystem::inode>(); + auto root_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, root_inode, "/"); + + THEN("reference count can be incremented and decremented, the mount is ready to unmount when the reference " + "count == 0") + { + auto mount = kernel::filesystem::mount{root_dentry, root_dentry, fs, nullptr}; + + mount.increment_ref_count(); + REQUIRE(mount.get_ref_count() == 1); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + mount.increment_ref_count(); + REQUIRE(mount.get_ref_count() == 2); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + REQUIRE(mount.decrement_ref_count()); + REQUIRE(mount.get_ref_count() == 1); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + REQUIRE(mount.decrement_ref_count()); + REQUIRE(mount.get_ref_count() == 0); + REQUIRE(mount.is_ready_to_unmount()); + } + + THEN("decrementing reference count when it is already zero does not decrement it below zero") + { + auto mount = kernel::filesystem::mount{root_dentry, root_dentry, fs, nullptr}; + + REQUIRE_FALSE(mount.decrement_ref_count()); + REQUIRE(mount.get_ref_count() == 0); + REQUIRE(mount.is_ready_to_unmount()); + } + } +}
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