From 66c98f53fb0f2221ff9862eb15f35477b5064da9 Mon Sep 17 00:00:00 2001
From: MadMaurice <madmaurice@zom.bi>
Date: Wed, 30 Aug 2023 12:56:40 +0200
Subject: [PATCH] test_cpu_simple - Add DAA example as a test

---
 tests/test_cpu_simple.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/tests/test_cpu_simple.cpp b/tests/test_cpu_simple.cpp
index 41ea4ec..9f63dcb 100644
--- a/tests/test_cpu_simple.cpp
+++ b/tests/test_cpu_simple.cpp
@@ -217,3 +217,35 @@ TEST_CASE("RST op leads to correct call")
 
   CHECK(cpu.state.PC == expected_pc);
 }
+
+TEST_CASE("DAA")
+{
+  u8 test_ram[] = {
+    0x80, // ADD A,B
+    0x27, // DAA
+    0x90, // SUB A,B
+    0x27, // DAA
+  };
+
+  RAM r(test_ram, 0x4, true);
+  Cpu cpu(&r);
+
+  cpu.state.A = 0x45;
+  cpu.state.B = 0x38;
+
+  cpu.step();
+
+  CHECK(cpu.state.A == 0x7D);
+
+  cpu.step();
+
+  CHECK(cpu.state.A == 0x83);
+
+  cpu.step();
+
+  CHECK(cpu.state.A == 0x4B);
+
+  cpu.step();
+
+  CHECK(cpu.state.A == 0x45);
+}