1 files changed, 35 insertions, 0 deletions
diff --git a/jni/ruby/test/mkmf/test_have_macro.rb b/jni/ruby/test/mkmf/test_have_macro.rb
new file mode 100644
index 0000000..43c4029
--- /dev/null
+++ b/jni/ruby/test/mkmf/test_have_macro.rb
@@ -0,0 +1,35 @@
+require_relative 'base'
+require 'tempfile'
+
+class TestMkmf
+  class TestHaveMacro < TestMkmf
+    MACRO_NAME = "RUBY_MKMFTEST_FOOBAR"
+
+    def test_have_macro_opt
+      assert_equal(true, have_macro(MACRO_NAME, nil, "-D#{MACRO_NAME}"), MKMFLOG)
+    end
+
+    def test_have_macro_header
+      Tempfile.create(%w"test_mkmf .h", ".") do |tmp|
+        tmp.puts("#undef #{MACRO_NAME}")
+        tmp.puts("#define #{MACRO_NAME} 1")
+        tmp.close
+        base = File.basename(tmp.path)
+        assert_equal(true, have_macro(MACRO_NAME, base, "-I."), MKMFLOG)
+      end
+    end
+
+    def test_not_have_macro_opt
+      assert_equal(false, have_macro(MACRO_NAME, nil, "-U#{MACRO_NAME}"), MKMFLOG)
+    end
+
+    def test_not_have_macro_header
+      Tempfile.create(%w"test_mkmf .h", ".") do |tmp|
+        tmp.puts("#undef #{MACRO_NAME}")
+        tmp.close
+        base = File.basename(tmp.path)
+        assert_equal(false, have_macro(MACRO_NAME, base, "-I."), MKMFLOG)
+      end
+    end
+  end
+end