Strict code coverage.

tests/HashMapTest.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DNW\Skills\Tests;
+
+use DNW\Skills\HashMap;
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+
+#[CoversClass(HashMap::class)]
+class HashMapTest extends TestCase
+{
+    public function testHashmap(): void
+    {
+        $h = new HashMap();
+
+        $this->assertEquals([], $h->getAllKeys());
+        $this->assertEquals([], $h->getAllValues());
+
+
+        $o1 = new \stdClass();
+        $o2 = new \stdClass();
+
+        $h->setValue($o1, 1);
+        $h->setvalue($o2, 2);
+
+        $this->assertEquals([1, 2], $h->getAllValues());
+
+        $this->assertEquals(1, $h->getvalue($o1));
+        $this->assertEquals(2, $h->getvalue($o2));
+
+        $this->assertEquals(2, $h->count());
+    }
+}