danielebarchiesi@0: <?php
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * @file
danielebarchiesi@0:  * Contains \CtoolsMathExpressionTestCase.
danielebarchiesi@0:  */
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Tests the MathExpression library of ctools.
danielebarchiesi@0:  */
danielebarchiesi@0: class CtoolsMathExpressionTestCase extends DrupalWebTestCase {
danielebarchiesi@0:   public static function getInfo() {
danielebarchiesi@0:     return array(
danielebarchiesi@0:       'name' => 'CTools math expression tests',
danielebarchiesi@0:       'description' => 'Test the math expression library of ctools.',
danielebarchiesi@0:       'group' => 'Chaos Tools Suite',
danielebarchiesi@0:     );
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   public function setUp() {
danielebarchiesi@0:     parent::setUp('ctools', 'ctools_plugin_test');
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   /**
danielebarchiesi@0:    * Returns a random double between 0 and 1.
danielebarchiesi@0:    */
danielebarchiesi@0:   protected function rand01() {
danielebarchiesi@0:     return rand(0, PHP_INT_MAX) / PHP_INT_MAX;
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   /**
danielebarchiesi@0:    * A custom assertion with checks the values in a certain range.
danielebarchiesi@0:    */
danielebarchiesi@0:   protected function assertFloat($first, $second, $delta = 0.0000001, $message = '', $group = 'Other') {
danielebarchiesi@0:     return $this->assert(abs($first - $second) <= $delta, $message ? $message : t('Value @first is equal to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE))), $group);
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   public function testArithmetic() {
danielebarchiesi@0:     $math_expression = new ctools_math_expr();
danielebarchiesi@0: 
danielebarchiesi@0:     // Test constant expressions.
danielebarchiesi@0:     $this->assertEqual($math_expression->e('2'), 2);
danielebarchiesi@0:     $random_number = rand(0, 10);
danielebarchiesi@0:     $this->assertEqual($random_number, $math_expression->e((string) $random_number));
danielebarchiesi@0: 
danielebarchiesi@0:     // Test simple arithmetic.
danielebarchiesi@0:     $random_number_a = rand(5, 10);
danielebarchiesi@0:     $random_number_b = rand(5, 10);
danielebarchiesi@0:     $this->assertEqual($random_number_a + $random_number_b, $math_expression->e("$random_number_a + $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a - $random_number_b, $math_expression->e("$random_number_a - $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a * $random_number_b, $math_expression->e("$random_number_a * $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a / $random_number_b, $math_expression->e("$random_number_a / $random_number_b"));
danielebarchiesi@0: 
danielebarchiesi@0:     // Test Associative property.
danielebarchiesi@0:     $random_number_c = rand(5, 10);
danielebarchiesi@0:     $this->assertEqual($math_expression->e("$random_number_a + ($random_number_b + $random_number_c)"), $math_expression->e("($random_number_a + $random_number_b) + $random_number_c"));
danielebarchiesi@0:     $this->assertEqual($math_expression->e("$random_number_a * ($random_number_b * $random_number_c)"), $math_expression->e("($random_number_a * $random_number_b) * $random_number_c"));
danielebarchiesi@0: 
danielebarchiesi@0:     // Test Commutative property.
danielebarchiesi@0:     $this->assertEqual($math_expression->e("$random_number_a + $random_number_b"), $math_expression->e("$random_number_b + $random_number_a"));
danielebarchiesi@0:     $this->assertEqual($math_expression->e("$random_number_a * $random_number_b"), $math_expression->e("$random_number_b * $random_number_a"));
danielebarchiesi@0: 
danielebarchiesi@0:     // Test Distributive property.
danielebarchiesi@0:     $this->assertEqual($math_expression->e("($random_number_a + $random_number_b) * $random_number_c"), $math_expression->e("($random_number_a * $random_number_c + $random_number_b * $random_number_c)"));
danielebarchiesi@0: 
danielebarchiesi@0:     $this->assertEqual(pow($random_number_a, $random_number_b), $math_expression->e("$random_number_a ^ $random_number_b"));
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   public function testBuildInFunctions() {
danielebarchiesi@0:     $math_expression = new ctools_math_expr();
danielebarchiesi@0: 
danielebarchiesi@0:     // @todo: maybe run this code multiple times to test different values.
danielebarchiesi@0:     $random_double = $this->rand01();
danielebarchiesi@0:     $random_int = rand(5, 10);
danielebarchiesi@0:     $this->assertFloat(sin($random_double), $math_expression->e("sin($random_double)"));
danielebarchiesi@0:     $this->assertFloat(cos($random_double), $math_expression->e("cos($random_double)"));
danielebarchiesi@0:     $this->assertFloat(tan($random_double), $math_expression->e("tan($random_double)"));
danielebarchiesi@0:     $this->assertFloat(exp($random_double), $math_expression->e("exp($random_double)"));
danielebarchiesi@0:     $this->assertFloat(sqrt($random_double), $math_expression->e("sqrt($random_double)"));
danielebarchiesi@0:     $this->assertFloat(log($random_double), $math_expression->e("ln($random_double)"));
danielebarchiesi@0:     $this->assertFloat(round($random_double), $math_expression->e("round($random_double)"));
danielebarchiesi@0:     $this->assertFloat(abs($random_double + $random_int), $math_expression->e('abs(' . ($random_double + $random_int) . ')'));
danielebarchiesi@0:     $this->assertEqual(round($random_double + $random_int), $math_expression->e('round(' . ($random_double + $random_int) . ')'));
danielebarchiesi@0:     $this->assertEqual(ceil($random_double + $random_int), $math_expression->e('ceil(' . ($random_double + $random_int) . ')'));
danielebarchiesi@0:     $this->assertEqual(floor($random_double + $random_int), $math_expression->e('floor(' . ($random_double + $random_int) . ')'));
danielebarchiesi@0: 
danielebarchiesi@0:     // @fixme: you can't run time without an argument.
danielebarchiesi@0:     $this->assertFloat(time(), $math_expression->e('time(1)'));
danielebarchiesi@0: 
danielebarchiesi@0:     $random_double_a = $this->rand01();
danielebarchiesi@0:     $random_double_b = $this->rand01();
danielebarchiesi@0:     // @fixme: max/min don't work at the moment.
danielebarchiesi@0: //    $this->assertFloat(max($random_double_a, $random_double_b), $math_expression->e("max($random_double_a, $random_double_b)"));
danielebarchiesi@0: //    $this->assertFloat(min($random_double_a, $random_double_b), $math_expression->e("min($random_double_a, $random_double_b)"));
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   public function testVariables() {
danielebarchiesi@0:     $math_expression = new ctools_math_expr();
danielebarchiesi@0: 
danielebarchiesi@0:     $random_number_a = rand(5, 10);
danielebarchiesi@0:     $random_number_b = rand(5, 10);
danielebarchiesi@0: 
danielebarchiesi@0:     // Store the first random number and use it on calculations.
danielebarchiesi@0:     $math_expression->e("var = $random_number_a");
danielebarchiesi@0:     $this->assertEqual($random_number_a + $random_number_b, $math_expression->e("var + $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a * $random_number_b, $math_expression->e("var * $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a - $random_number_b, $math_expression->e("var - $random_number_b"));
danielebarchiesi@0:     $this->assertEqual($random_number_a / $random_number_b, $math_expression->e("var / $random_number_b"));
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   public function testCustomFunctions() {
danielebarchiesi@0:     $math_expression = new ctools_math_expr();
danielebarchiesi@0: 
danielebarchiesi@0:     $random_number_a = rand(5, 10);
danielebarchiesi@0:     $random_number_b = rand(5, 10);
danielebarchiesi@0: 
danielebarchiesi@0:     // Create a one-argument function.
danielebarchiesi@0:     $math_expression->e("f(x) = 2 * x");
danielebarchiesi@0:     $this->assertEqual($random_number_a * 2, $math_expression->e("f($random_number_a)"));
danielebarchiesi@0:     $this->assertEqual($random_number_b * 2, $math_expression->e("f($random_number_b)"));
danielebarchiesi@0: 
danielebarchiesi@0:     // Create a two-argument function.
danielebarchiesi@0:     $math_expression->e("g(x, y) = 2 * x + y");
danielebarchiesi@0:     $this->assertEqual($random_number_a * 2 + $random_number_b, $math_expression->e("g($random_number_a, $random_number_b)"));
danielebarchiesi@0: 
danielebarchiesi@0:     // Use a custom function in another function.
danielebarchiesi@0:     $this->assertEqual(($random_number_a * 2 + $random_number_b) * 2, $math_expression->e("f(g($random_number_a, $random_number_b))"));
danielebarchiesi@0:   }
danielebarchiesi@0: }