1 files changed, 47 insertions, 0 deletions
diff --git a/jni/ruby/test/mkmf/test_sizeof.rb b/jni/ruby/test/mkmf/test_sizeof.rb
new file mode 100644
index 0000000..c014422
--- /dev/null
+++ b/jni/ruby/test/mkmf/test_sizeof.rb
@@ -0,0 +1,47 @@
+require_relative 'base'
+
+class TestMkmf
+  class TestSizeof < TestMkmf
+    def setup
+      super
+      @sizeof_short = config_value("SIZEOF_SHORT").to_i
+      @sizeof_int = config_value("SIZEOF_INT").to_i
+      @sizeof_long = config_value("SIZEOF_LONG").to_i
+      @sizeof_long_long = config_value("SIZEOF_LONG_LONG").to_i
+      @sizeof___int64 = config_value("SIZEOF___INT64").to_i
+    end
+
+    def test_sizeof_builtin
+      %w[char short int long float double void*].each do |type|
+        assert_kind_of(Integer, mkmf {check_sizeof(type)}, MKMFLOG)
+      end
+      assert_operator(@sizeof_short, :<=, @sizeof_int)
+      assert_operator(@sizeof_int, :<=, @sizeof_long)
+      assert_operator(@sizeof_long, :<=, @sizeof_long_long) unless @sizeof_long_long.zero?
+      assert_equal(8, @sizeof___int64) unless @sizeof___int64.zero?
+    end
+
+    def test_sizeof_struct
+      open("confdefs.h", "w") {|f|
+        f.puts "typedef struct {char x;} test1_t;"
+      }
+      assert_equal(1, mkmf {check_sizeof("test1_t", "confdefs.h")}, MKMFLOG)
+
+      open("confdefs.h", "w") {|f|
+        f.puts "typedef struct {char x, y;} test1_t;"
+      }
+      assert_equal(2, mkmf {check_sizeof("test1_t", "confdefs.h")}, MKMFLOG)
+
+      open("confdefs.h", "w") {|f|
+        f.puts "typedef struct {int x;} test1_t;"
+      }
+      assert_equal(@sizeof_int, mkmf {check_sizeof("test1_t", "confdefs.h")}, MKMFLOG)
+      open("confdefs.h", "w") {|f|
+        f.puts "typedef struct {int x, y;} test1_t;"
+      }
+      assert_equal(2 * @sizeof_int, mkmf {check_sizeof("test1_t", "confdefs.h")}, MKMFLOG)
+    ensure
+      File.unlink("confdefs.h")
+    end
+  end
+end