Add spec for a function returning a function

* Used by the sassc gem.
ffi · May 16, 2019 · a097226 · a097226
1 parent c394c48
commit a097226
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/spec/ffi/callback_spec.rb b/spec/ffi/callback_spec.rb
@@ -75,6 +75,7 @@ class S8F32S32 < FFI::Struct
     attach_function :testCallbackVrS64, :testClosureVrLL, [ :cbVrS64 ], :long_long
     attach_function :testCallbackVrU64, :testClosureVrLL, [ :cbVrU64 ], :ulong_long
     attach_function :testCallbackVrP, :testClosureVrP, [ :cbVrP ], :pointer
+    attach_function :testCallbackReturningFunction, :testClosureVrP, [ :cbVrP ], :cbVrP
     attach_function :testCallbackVrY, :testClosureVrP, [ :cbVrY ], S8F32S32.ptr
     attach_function :testCallbackVrT, :testClosureVrT, [ :cbVrT ], S8F32S32.by_value
     attach_function :testCallbackTrV, :testClosureTrV, [ :cbTrV, S8F32S32.ptr ], :void
@@ -266,6 +267,12 @@ class S8F32S32 < FFI::Struct
     expect(LibTest.testCallbackVrP { p }).to eq(p)
   end
 
+  it "returning a callback function" do
+    ret = LibTest.testCallbackReturningFunction { FFI::Pointer.new(42) }
+    expect(ret).to be_kind_of(FFI::Function)
+    expect(ret.address).to eq(42)
+  end
+
   it "returning struct by value" do
     skip "Segfault on 32 bit MINGW" if RUBY_PLATFORM == 'i386-mingw32'
     s = LibTest::S8F32S32.new