Create test for unwrapping formatted numbers

tests/HtmlPiecesTest.php

@@ -0,0 +1,18 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use hmerritt\HtmlPieces;
+
+class HtmlPiecesTest extends TestCase {
+
+    public function test_unwrapFormattedNumber()
+    {
+        $htmlPieces = new HtmlPieces;
+
+        $this->assertEquals("1500000", $htmlPieces->unwrapFormattedNumber("1.5M"));
+        $this->assertEquals("1200", $htmlPieces->unwrapFormattedNumber("1.2K"));
+        $this->assertEquals("1.8", $htmlPieces->unwrapFormattedNumber("1.8"));
+        // $this->assertEquals($expected, $actual);
+    }
+
+}