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