1 files changed, 25 insertions, 0 deletions
diff --git a/arch/i386/test_gdt.cc b/arch/i386/test_gdt.cc
new file mode 100644
index 0000000..3501ae9
--- /dev/null
+++ b/arch/i386/test_gdt.cc
@@ -0,0 +1,25 @@
+#include <gtest/gtest.h>
+
+extern "C" {
+#include "gdt.h"
+}
+
+TEST(i686GDT, KnownAccessByteValues)
+{
+  EXPECT_EQ(*(uint8_t *)&null_access, 0x00);
+  EXPECT_EQ(*(uint8_t *)&ktext_access, 0x9a);
+  EXPECT_EQ(*(uint8_t *)&kdata_access, 0x92);
+}
+
+TEST(i686GDT, NullSegmentDescriptor)
+{
+  struct SegmentDescriptor_t d;
+  SegmentDescriptor(&d, 0, 0, 0);
+  EXPECT_EQ(*(uint64_t *)&d, 0);
+}
+
+TEST(i686GDT, SegmentIndex)
+{
+  EXPECT_EQ(ktextDescriptor, 0x10);
+  EXPECT_EQ(kdataDescriptor, 0x18);
+}