1 files changed, 26 insertions, 0 deletions
diff --git a/test/mkmf/test_convertible.rb b/test/mkmf/test_convertible.rb
new file mode 100644
index 0000000000..e8cc280eeb
--- /dev/null
+++ b/test/mkmf/test_convertible.rb
@@ -0,0 +1,26 @@
+require_relative 'base'
+
+class TestMkmf
+  class TestConvertible < TestMkmf
+    def test_typeof_builtin
+      ["", ["signed ", ""], "unsigned "].each do |signed, prefix|
+        %w[short int long].each do |type|
+          assert_equal((prefix || signed)+type,
+                       mkmf {convertible_int(signed+type)})
+        end
+      end
+    end
+
+    def test_typeof_typedef
+      ["", ["signed ", ""], "unsigned "].each do |signed, prefix|
+        %w[short int long].each do |type|
+          open("confdefs.h", "w") {|f|
+            f.puts "typedef #{signed}#{type} test1_t;"
+          }
+          assert_equal((prefix || signed)+type,
+                       mkmf {convertible_int("test1_t", "confdefs.h")})
+        end
+      end
+    end
+  end
+end