add tests

Author: robotomize

tests/PowerRegressionTest.php

@@ -5,6 +5,7 @@
 use PHPUnit_Framework_TestCase;
 use Regression\PowerRegression;
 use Regression\RegressionException;
+use Regression\RegressionFactory;
 use Regression\RegressionModel;
 
 /**
@@ -24,7 +25,7 @@ class PowerRegressionTest extends PHPUnit_Framework_TestCase
  */
  public function setUp()
  {
- $this->rows = [
+ $this->rows[0] = [
  [1, 10], [2, 30], [3, 68], [4, 130], [5, 222], [6, 350], [7, 520], [8, 738], [9, 1010], [10, 1342]
  ];
  /**
@@ -49,7 +50,7 @@ public function tearDown()
  public function testCalculate()
  {
  $linear = new PowerRegression();
- $linear->setSourceSequence($this->rows);
+ $linear->setSourceSequence($this->rows[0]);
  $linear->calculate();
 
  /** @var RegressionModel $regressionModel */
@@ -59,5 +60,11 @@ public function testCalculate()
  $this->assertEquals(1126, round($regressionModel->getResultSequence()[9][1]));
  $this->assertEquals(895, round($regressionModel->getResultSequence()[8][1]));
  $this->assertEquals(693, round($regressionModel->getResultSequence()[7][1]));
+
+ $regressionModel = RegressionFactory::power($this->rows[1]);
+ $this->assertEquals('y = 11.69 + x^0.11', $regressionModel->getEquation());
+ $this->assertEquals(12, round($regressionModel->getResultSequence()[0][1]));
+ $this->assertEquals(13, round($regressionModel->getResultSequence()[1][1]));
+ $this->assertEquals(13, round($regressionModel->getResultSequence()[2][1]));
  }
 }