public function testSave() { $this->manager->saveRatio("USD", 1.25); $this->assertEquals("EUR;1\nUSD;1.25\n", file_get_contents($this->fileName)); $this->manager->saveRatio("CAD", 1.5); $this->assertEquals("EUR;1\nUSD;1.25\nCAD;1.5\n", file_get_contents($this->fileName)); $this->assertEquals(array('USD' => 1.25, 'EUR' => 1.0, 'CAD' => 1.5), $this->manager->getRatioList()); }