From 13534f8d45653fe7dff3747847f7ff03ae6459b0 Mon Sep 17 00:00:00 2001
From: Sam M W <you@example.com>
Date: Tue, 25 Apr 2023 21:51:06 +0100
Subject: [PATCH] add adc test from solid65

---
 src/cpu.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/cpu.rs b/src/cpu.rs
index 7988ed0..9f350a3 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -1138,6 +1138,20 @@ mod tests {
         assert!(cpu.registers.status.contains(Status::PS_CARRY));
     }
 
+    #[test]
+    fn solid65_adc_immediate() {
+        let mut cpu = CPU::new(Ram::new());
+
+        // Adding $FF plus carry should be the same as adding $00 and no carry, so these three
+        // instructions should leave the carry flags unaffected, i.e. set.
+        cpu.execute_instruction((Instruction::LDA, OpInput::UseImmediate(0x9c)));
+        cpu.execute_instruction((Instruction::SEC, OpInput::UseImplied));
+        cpu.execute_instruction((Instruction::ADC, OpInput::UseImmediate(0xff)));
+
+        assert_eq!(cpu.registers.accumulator, 0x9c);
+        assert!(cpu.registers.status.contains(Status::PS_CARRY));
+    }
+
     #[test]
     fn and_test() {
         let mut cpu = CPU::new(Ram::new());