Add test for Dimension

refs #4192

test/php/library/Icinga/Util/DimensionTest.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Tests\Icinga\Util;
+
+require_once("../../library/Icinga/Util/Dimension.php");
+use Icinga\Util\Dimension;
+
+/**
+ * Tests for the dimension class
+ *
+ */
+class DimensionTest extends \PHPUnit_Framework_TestCase {
+
+    /**
+     * Test Dimension creation from string
+     *
+     */
+    public function testStringFactoryWithValidInput()
+    {
+        $d = Dimension::fromString("200px");
+        $this->assertEquals(200, $d->getValue(), "Asserting the numeric value of px input to be correctly parsed");
+        $this->assertEquals(Dimension::UNIT_PX, $d->getUnit(), "Asserting the unit of px input to be correctly parsed");
+
+        $d = Dimension::fromString("40%");
+        $this->assertEquals(40, $d->getValue(), "Asserting the numeric value of % input to be correctly parsed");
+        $this->assertEquals(Dimension::UNIT_PERCENT, $d->getUnit(), "Asserting the unit of % input to be correctly parsed");
+
+        $d = Dimension::fromString("4044em");
+        $this->assertEquals(4044, $d->getValue(), "Asserting the numeric value of em input to be correctly parsed");
+        $this->assertEquals(Dimension::UNIT_EM, $d->getUnit(), "Asserting the unit of em input to be correctly parsed");
+
+        $d = Dimension::fromString("010pt");
+        $this->assertEquals(10, $d->getValue(), "Asserting the numeric value of pt input to be correctly parsed");
+        $this->assertEquals(Dimension::UNIT_PT, $d->getUnit(), "Asserting the unit of pt input to be correctly parsed");
+    }
+
+    /**
+     * Test string creation from Dimension
+     *
+     */
+    public function testStringCreation()
+    {
+        $d = new Dimension(1000, Dimension::UNIT_PX);
+        $this->assertEquals("1000px", (string) $d, "Asserting value-unit string creation to be correct");
+
+        $d = new Dimension(40.5, Dimension::UNIT_PT);
+        $this->assertEquals("40pt", (string) $d, "Asserting float values being truncated by now");
+    }
+
+    /**
+     *
+     */
+    public function testInvalidDimensions()
+    {
+        $d = new Dimension(-20, Dimension::UNIT_PX);
+        $this->assertFalse($d->isDefined(), "Asserting a negative dimension to be considered invalid");
+    }
+}