1 files changed, 20 insertions, 0 deletions
diff --git a/spec/ffi/rbx/memory_pointer_spec.rb b/spec/ffi/rbx/memory_pointer_spec.rb
index 3878973..1270c9b 100644
--- a/spec/ffi/rbx/memory_pointer_spec.rb
+++ b/spec/ffi/rbx/memory_pointer_spec.rb
@@ -104,6 +104,18 @@ describe "MemoryPointer" do
     expect(m.read FFI::Type::BOOL).to eq(false)
   end
 
+  it "allows definition of a custom typedef" do
+    FFI.typedef :uint32, :fubar_t
+    expect(FFI.find_type(:fubar_t)).to eq(FFI::Type::Builtin::UINT32)
+  end
+
+  it "allows overwriting of a default typedef" do
+    FFI.typedef :uint32, :char
+    expect(FFI.find_type(:char)).to eq(FFI::Type::Builtin::UINT32)
+  ensure
+    FFI.typedef FFI::Type::Builtin::CHAR, :char
+  end
+
   it "allows writing a custom typedef" do
     FFI.typedef :uint, :fubar_t
     FFI.typedef :size_t, :fubar2_t
@@ -189,4 +201,12 @@ describe "MemoryPointer" do
     end
     expect(block_executed).to be true
   end
+
+  it "has a memsize function", skip: RUBY_ENGINE != "ruby" do
+    base_size = ObjectSpace.memsize_of(Object.new)
+
+    pointer = FFI::MemoryPointer.from_string("FFI is Awesome")
+    size = ObjectSpace.memsize_of(pointer)
+    expect(size).to be > base_size
+  end
 end