First commit

tests/ProgramCounterTest.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimAVRPHP\Tests;
+
+use SimAVRPHP\ProgramCounter;
+use SimAVRPHP\Exceptions\InvalidAddressException;
+
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+
+
+#[CoversClass(ProgramCounter::class)]
+class ProgramCounterTest extends TestCase
+{
+    public function testStepAndSet(): void
+    {
+        $pc = new ProgramCounter();
+        $this->assertEquals(0, $pc->get());
+
+        $pc->stepWords(1); //Step 1 word
+
+        $this->assertEquals(2, $pc->get());
+
+        $pc->jump(0x100);
+        $this->assertEquals(0x100, $pc->get());
+
+        $pc->reset();
+        $this->assertEquals(0, $pc->get());
+    }
+
+    public function testSetinvalid(): void
+    {
+        $pc = new ProgramCounter();
+        $this->expectException(InvalidAddressException::class);
+        $pc->jump(3); //Uneven address
+    }
+
+}