<?php
namespace Tests\TextAnalysis\Analysis;

use TextAnalysis\Analysis\FreqDist;
/**
 * Test cases for FreqDist
 * @author yooper (yooper)
 */
class FreqDistTest extends \PHPUnit\Framework\TestCase
{
    
    public function testSimpleFreqDist()
    { 
        $freqDist = new FreqDist(array("time", "flies", "like", "an", "arrow", "time", "flies", "like", "what"));
        $this->assertTrue(count($freqDist->getHapaxes()) === 3);        
        $this->assertEquals(9, $freqDist->getTotalTokens());
        $this->assertEquals(6, $freqDist->getTotalUniqueTokens());
    }
    
    public function testEmptyHapaxesFreqDist()
    { 
        $freqDist = new FreqDist(array("time", "time", "what", "what"));
        $this->assertTrue(count($freqDist->getHapaxes()) === 0);        
        $this->assertEquals(4, $freqDist->getTotalTokens());
        $this->assertEquals(2, $freqDist->getTotalUniqueTokens());
    }
    
    public function testSingleHapaxFreqDist()
    {
        $freqDist = new FreqDist(array("time"));
        $this->assertTrue(count($freqDist->getHapaxes()) === 1);        
        $this->assertEquals(1, $freqDist->getTotalTokens());
        $this->assertEquals(1, $freqDist->getTotalUniqueTokens());        
    } 

    /**
    *  
    */    
    public function testEmptyFreqDist()
    {
        $this->expectException(\TextAnalysis\Exceptions\InvalidParameterSizeException::class);
        $freqDist = new FreqDist([]);        
    }     
}