more coverage

gemma/tests/unit_tests.rs

@@ -1,6 +1,7 @@
 use log::debug;
 use rand::random;
 use gemma::chip8::computer::Chip8Computer;
+use gemma::chip8::cpu_states::Chip8CpuStates::WaitingForInstruction;
 use gemma::chip8::delay_timer::DelayTimer;
 use gemma::chip8::instructions::Chip8CpuInstructions;
 use gemma::chip8::instructions::Chip8CpuInstructions::JPX;
@@ -9,6 +10,7 @@ use gemma::chip8::quirk_modes::QuirkMode::{Chip8, SChipModern, XOChip};
 use gemma::chip8::registers::Chip8Registers;
 use gemma::chip8::sound_timer::SoundTimer;
 use gemma::chip8::stack::Chip8Stack;
+use gemma::chip8::system_memory::Chip8SystemMemory;
 use gemma::chip8::util::InstructionUtil;
 use gemma::chip8::video::{Chip8Video, Chip8VideoModes};
 use gemma::constants::*;
@@ -1358,7 +1360,46 @@ fn instruction_jpx() {
     x.registers.poke(0x01, 0x04);
     // ...use (x1)+0x134
     let to_execute = JPX(0x01, 0x34);
-    // expect to set PC to 0x524
+    // expect to set PC to 0x834
     to_execute.execute(&mut x);
-    assert_eq!(x.registers.peek_pc(), 0x524);
+    assert_eq!(x.registers.peek_i(), 0x834);
+}
+
+#[test]
+fn instruction_ldrd() {
+    let mut x = Chip8Computer::new();
+    x.state = WaitingForInstruction;
+    x.delay_timer.set_timer(0x01);
+    Chip8CpuInstructions::LDRD(0x01).execute(&mut x);
+    assert_eq!(x.registers.peek(0x01), 0x01);
+    x.delay_timer.set_timer(0xff);
+    Chip8CpuInstructions::LDRD(0x0).execute(&mut x);
+    assert_eq!(x.registers.peek(0x00), 0xff);
+    x.step_system();
+    x.step_system();
+    x.step_system();
+    x.step_system();
+    Chip8CpuInstructions::LDRD(0x0).execute(&mut x);
+    assert_eq!(x.registers.peek(0x0), 0xfb);
+}
+
+#[test]
+fn video_hires_loop_check() {
+    let max_address = SCHIP_VIDE_MEMORY;
+    let x = build_checkboard_hd();
+    x.peek((max_address + 1) as u16);
+    // if we got here we didn't explode!
+    assert!(true);
+}
+
+#[test]
+fn sound_timer_default() {
+    let x = SoundTimer::default();
+    assert_eq!(x.current(), 0);
+}
+
+#[test]
+fn system_memory_new() {
+    let x = Chip8SystemMemory::new();
+    assert!(true);
 }