1 files changed, 155 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/tests/phpunit/Benchmark/Benchmarker.php b/www/wiki/extensions/SemanticMediaWiki/tests/phpunit/Benchmark/Benchmarker.php
new file mode 100644
index 00000000..41f4c9a0
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/tests/phpunit/Benchmark/Benchmarker.php
@@ -0,0 +1,155 @@
+<?php
+
+namespace SMW\Tests\Benchmark;
+
+/**
+ * @license GNU GPL v2+
+ * @since 2.1
+ *
+ * @author mwjames
+ */
+class Benchmarker {
+
+	/**
+	 * @var array
+	 */
+	private $container = [];
+
+	/**
+	 * @var boolean
+	 */
+	private $useAsSample = false;
+
+	/**
+	 * @var integer
+	 */
+	private $roundFactor;
+
+	/**
+	 * @since 2.1
+	 */
+	public function __construct( $roundFactor = 7 ) {
+		$this->roundFactor = $roundFactor;
+	}
+
+	/**
+	 * @since 2.1
+	 */
+	public function clear() {
+		$this->container = [];
+		return $this;
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param boalean $state false when takling about the entire population;
+	 * true when it is a sample (a selection from a population)
+	 */
+	public function useAsSample( $state = true ) {
+		$this->useAsSample = $state;
+		return $this;
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param integer $roundFactor
+	 */
+	public function roundBy( $roundFactor ) {
+		$this->roundFactor = $roundFactor;
+		return $this;
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param integer $point
+	 * @param integer $decimals
+	 */
+	public function addBenchmarkPoint( $point, $decimals = 10 ) {
+		$this->container[] = number_format( $point, $decimals );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param integer[] $poins
+	 */
+	public function addBenchmarkPoints( array $poins ) {
+		$this->container = $poins;
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @return integer
+	 */
+	public function getSum() {
+		return $this->round( array_sum( $this->container ) );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @return integer
+	 */
+	public function getMean() {
+		return $this->round( $this->getSum() / count( $this->container ) );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @return integer
+	 */
+	public function getVariance() {
+
+		$mean  = $this->getMean();
+		$count = count( $this->container );
+
+		$sumOfSquares = 0;
+
+		foreach ( $this->container as $value ) {
+			$sumOfSquares += pow( $value - $mean, 2 );
+		}
+
+		return $sumOfSquares / ( $this->useAsSample ? $count - 1 : $count );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @return integer
+	 */
+	public function getStandardDeviation() {
+		return $this->round( (float)sqrt( $this->getVariance() ) );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param integer $basis
+	 *
+	 * @return integer
+	 */
+	public function getStandardScoreBy( $basis = 0 ) {
+		return $this->round( ( $basis - $this->getMean() ) / $this->getStandardDeviation() );
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param integer $basis
+	 *
+	 * @return integer
+	 */
+	public function getNormalizedValueBy( $basis = 1 ) {
+		return $this->round( $this->getMean() / $basis );
+	}
+
+	private function round( $value ) {
+		return round( $value, $this->roundFactor );
+	}
+
+}