Add ifMore helper

src/Comparison/Helpers.php

@@ -31,6 +31,7 @@ class Helpers extends BaseHelpers
         $this->add('ifEven', new IfEvenHelper());
         $this->add('ifOdd', new IfOddHelper());
         $this->add('ifLess', new IfLessHelper());
+        $this->add('ifMore', new IfMoreHelper());
         $this->add('unlessEqual', new UnlessEqualHelper());
     }
 }

src/Comparison/IfMoreHelper.php

@@ -0,0 +1,47 @@
+<?php
+/*
+ * This file is part of Handlebars.php Helpers Set
+ *
+ * (c) Dmitriy Simushev <simushevds@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace JustBlackBird\HandlebarsHelpers\Comparison;
+
+use Handlebars\Helper as HelperInterface;
+
+/**
+ * Conditional helper that checks if one value is more than another one.
+ *
+ * By "more" strict inequality is meant. That's why in cases where two equal
+ * values are compared the result of the "more" operation is false.
+ *
+ * Example of usage:
+ * ```handlebars
+ *   {{#ifMore first second}}
+ *     The first argument is more than the second one.
+ *   {{else}}
+ *     The first argument is less or equal to the second one.
+ *   {{/ifMore}}
+ * ```
+ *
+ * @author Dmitriy Simushev <simushevds@gmail.com>
+ */
+class IfMoreHelper extends AbstractComparisonHelper implements HelperInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function evaluateCondition($args)
+    {
+        if (count($args) != 2) {
+            throw new \InvalidArgumentException(
+                '"ifMore" helper expects exactly two arguments.'
+            );
+        }
+
+        return ($args[0] > $args[1]);
+    }
+}

tests/Comparison/HelpersTest.php

@@ -43,6 +43,7 @@ class HelpersTest extends \PHPUnit_Framework_TestCase
             array('ifEven', '\\JustBlackBird\\HandlebarsHelpers\\Comparison\\IfEvenHelper'),
             array('ifOdd', '\\JustBlackBird\\HandlebarsHelpers\\Comparison\\IfOddHelper'),
             array('ifLess', '\\JustBlackBird\\HandlebarsHelpers\\Comparison\\IfLessHelper'),
+            array('ifMore', '\\JustBlackBird\\HandlebarsHelpers\\Comparison\\IfMoreHelper'),
             array('unlessEqual', '\\JustBlackBird\\HandlebarsHelpers\\Comparison\\UnlessEqualHelper'),
         );
     }

tests/Comparison/IfMoreHelperTest.php

@@ -0,0 +1,90 @@
+<?php
+/*
+ * This file is part of Handlebars.php Helpers Set
+ *
+ * (c) Dmitriy Simushev <simushevds@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace JustBlackBird\HandlebarsHelpers\Tests\Comparison;
+
+use JustBlackBird\HandlebarsHelpers\Comparison\IfMoreHelper;
+
+/**
+ * Test class for "ifMore" helper.
+ *
+ * @author Dmitriy Simushev <simushevds@gmail.com>
+ */
+class IfMoreHelperTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Tests conditions work as expected.
+     *
+     * @dataProvider conditionProvider
+     */
+    public function testCondition($value, $border, $is_less)
+    {
+        $helpers = new \Handlebars\Helpers(array('ifMore' => new IfMoreHelper()));
+        $engine = new \Handlebars\Handlebars(array('helpers' => $helpers));
+
+        $this->assertEquals(
+            $engine->render(
+                '{{#ifMore value border}}true{{else}}false{{/ifMore}}',
+                array(
+                    'value' => $value,
+                    'border' => $border,
+                )
+            ),
+            $is_less ? 'true' : 'false'
+        );
+    }
+
+    /**
+     * A data provider for testCondition method.
+     */
+    public function conditionProvider()
+    {
+        return array(
+            // Less values with different types.
+            array(3, 18, false),
+            array("42", "314", false),
+            // Equal values with different types.
+            array(0, 0, false),
+            array("42", "42", false),
+            // More values with different types.
+            array(89, 1, true),
+            array("34", "33", true),
+        );
+    }
+
+    /**
+     * Tests that exception is thrown if wrong number of arguments is used.
+     *
+     * @expectedException InvalidArgumentException
+     * @dataProvider wrongArgumentsProvider
+     */
+    public function testArgumentsCount($template)
+    {
+        $helpers = new \Handlebars\Helpers(array('ifMore' => new IfMoreHelper()));
+        $engine = new \Handlebars\Handlebars(array('helpers' => $helpers));
+
+        $engine->render($template, array());
+    }
+
+    /**
+     * A data provider for testArgumentsCount method.
+     */
+    public function wrongArgumentsProvider()
+    {
+        return array(
+            // Not enough arguments
+            array('{{#ifMore}}yes{{else}}no{{/ifMore}}'),
+            // Still not enough arguments
+            array('{{#ifMore 1}}yes{{else}}no{{/ifMore}}'),
+            // Too much arguments
+            array('{{#ifMore 1 2 3}}yes{{else}}no{{/ifMore}}'),
+        );
+    }
+}