1 files changed, 100 insertions, 0 deletions
diff --git a/test/fiddle/test_function.rb b/test/fiddle/test_function.rb
new file mode 100644
index 0000000000..cbf84eae9d
--- /dev/null
+++ b/test/fiddle/test_function.rb
@@ -0,0 +1,100 @@
+# frozen_string_literal: true
+begin
+  require_relative 'helper'
+rescue LoadError
+end
+
+module Fiddle
+  class TestFunction < Fiddle::TestCase
+    def setup
+      super
+      Fiddle.last_error = nil
+    end
+
+    def test_default_abi
+      func = Function.new(@libm['sin'], [TYPE_DOUBLE], TYPE_DOUBLE)
+      assert_equal Function::DEFAULT, func.abi
+    end
+
+    def test_name
+      func = Function.new(@libm['sin'], [TYPE_DOUBLE], TYPE_DOUBLE, name: 'sin')
+      assert_equal 'sin', func.name
+    end
+
+    def test_argument_errors
+      assert_raise(TypeError) do
+        Function.new(@libm['sin'], TYPE_DOUBLE, TYPE_DOUBLE)
+      end
+
+      assert_raise(TypeError) do
+        Function.new(@libm['sin'], ['foo'], TYPE_DOUBLE)
+      end
+
+      assert_raise(TypeError) do
+        Function.new(@libm['sin'], [TYPE_DOUBLE], 'foo')
+      end
+    end
+
+    def test_call
+      func = Function.new(@libm['sin'], [TYPE_DOUBLE], TYPE_DOUBLE)
+      assert_in_delta 1.0, func.call(90 * Math::PI / 180), 0.0001
+    end
+
+    def test_argument_count
+      closure = Class.new(Closure) {
+        def call one
+          10 + one
+        end
+      }.new(TYPE_INT, [TYPE_INT])
+      func = Function.new(closure, [TYPE_INT], TYPE_INT)
+
+      assert_raise(ArgumentError) do
+        func.call(1,2,3)
+      end
+      assert_raise(ArgumentError) do
+        func.call
+      end
+    end
+
+    def test_last_error
+      func = Function.new(@libc['strcpy'], [TYPE_VOIDP, TYPE_VOIDP], TYPE_VOIDP)
+
+      assert_nil Fiddle.last_error
+      func.call(+"000", "123")
+      refute_nil Fiddle.last_error
+    end
+
+    def test_strcpy
+      f = Function.new(@libc['strcpy'], [TYPE_VOIDP, TYPE_VOIDP], TYPE_VOIDP)
+      buff = +"000"
+      str = f.call(buff, "123")
+      assert_equal("123", buff)
+      assert_equal("123", str.to_s)
+    end
+
+    def test_nogvl_poll
+      begin
+        poll = @libc['poll']
+      rescue Fiddle::DLError
+        skip 'poll(2) not available'
+      end
+      f = Function.new(poll, [TYPE_VOIDP, TYPE_INT, TYPE_INT], TYPE_INT)
+
+      msec = 200
+      t0 = Process.clock_gettime(Process::CLOCK_MONOTONIC, :millisecond)
+      th = Thread.new { f.call(nil, 0, msec) }
+      n1 = f.call(nil, 0, msec)
+      n2 = th.value
+      t1 = Process.clock_gettime(Process::CLOCK_MONOTONIC, :millisecond)
+      assert_in_delta(msec, t1 - t0, 100, 'slept correct amount of time')
+      assert_equal(0, n1, 'poll(2) called correctly main-thread')
+      assert_equal(0, n2, 'poll(2) called correctly in sub-thread')
+    end
+
+    def test_no_memory_leak
+      prep = 'r = Fiddle::Function.new(Fiddle.dlopen(nil)["rb_obj_tainted"], [Fiddle::TYPE_UINTPTR_T], Fiddle::TYPE_UINTPTR_T); a = "a"'
+      code = 'begin r.call(a); rescue TypeError; end'
+      assert_no_memory_leak(%w[-W0 -rfiddle], "#{prep}\n1000.times{#{code}}", "10_000.times {#{code}}", limit: 1.2)
+    end
+  end
+end if defined?(Fiddle)