<?php
use PHPUnit\Framework\TestCase;
require('discord-crypto-bot.php');
 
class Test_coins extends TestCase { 
 
  private $MIN_BTC_USD = 5000;
  private $MIN_BTC_CNY = 20000;
  private $MIN_SBD_USD = 0.1;
 
  public function test_isCoin() {
    $this->assertTrue(isCoin("BTC"));
    $this->assertTrue(isCoin("btc"));
    $this->assertTrue(isCoin("steem"));
    $this->assertTrue(isCoin("sTEem"));
    $this->assertTrue(isCoin("cny"));
    $this->assertTrue(isCoin("cNY"));
    $this->assertTrue(!isCoin("1234123dadf4"));
    $this->assertTrue(!isCoin(" steem "));
    $this->assertTrue(!isCoin(" steem"));
    $this->assertTrue(isCoin("steem-dollars")); 
  }   
  
  public function test_GetPrice() {
    $x = GetPrice("btc", "usd");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $y = GetPrice("BTC", "USD");
    $this->assertTrue(abs($x - $y) < 2);
    $z = GetPrice("BTC", "CNY");
    $this->assertTrue($z >= $this->MIN_BTC_CNY);    
  }
  
  public function test_GetPriceCC() {
    $x = GetPriceCC("btc", "usd");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $y = GetPriceCC("BTC", "USD");
    $this->assertTrue(abs($x - $y) < 2);
    $z = GetPriceCC("BTC", "CNY");
    $this->assertTrue($z >= $this->MIN_BTC_CNY);        
  }  
  
  public function test_getPriceOf() {
    $x = getPriceOf("btc", "usd");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $y = getPriceOf("BTC", "USD");
    $this->assertTrue(abs($x - $y) < 2);
    $z = getPriceOf("BTC", "CNY");
    $this->assertTrue($z >= $this->MIN_BTC_CNY);
    $u = getPriceOf("bitcoin", "usd");
    $this->assertTrue($u >= $this->MIN_BTC_USD);
    $v = getPriceOf("steem-dollars", "usd");
    $this->assertTrue($v >= $this->MIN_SBD_USD);                  
  }
  
  public function test_getPriceOf1BTC() {
    $x = getPriceOf1BTC("cny");
    $this->assertTrue($x >= $this->MIN_BTC_CNY);
    $y = getPriceOf1BTC("usd");
    $this->assertTrue($y >= $this->MIN_BTC_USD);
  }
  
  public function test_getPriceOfUSD() {
    $x = getPriceOfUSD("btc");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $x = getPriceOfUSD("bitcoin");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $a = getPriceOfUSD("SBD");
    $this->assertTrue($a >= $this->MIN_SBD_USD);    
    $b = getPriceOfUSD("steem-dollars");
    $this->assertTrue($b >= $this->MIN_SBD_USD);
    $this->assertTrue(abs($a - $b) <= 0.01);            
  }  
  
  public function test_ConvertCoinToCoinRate() {
    $x = ConvertCoinToCoinRate("btc", "sbd");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $y = ConvertCoinToCoinRate("sbd", "btc");
    $this->assertTrue(abs($x * $y - 1) <= 1e-3);
    $x = ConvertCoinToCoinRate("btc", "usd");
    $this->assertTrue($x >= $this->MIN_BTC_USD);
    $v = ConvertCoinToCoinRate("steem-dollars", "usd");
    $this->assertTrue($v >= $this->MIN_SBD_USD);                  
  }
 
   public function test_NGN() {
       $this->coinTest("NGN", "BTC", 0, 0);
       $this->coinTest("BTC", "NGN", 1000, 10e8);
       $this->coinTest("STEEM", "NGN", 100, 10e8);
       $this->coinTest("NGN", "STEEM", 0, 1);
       $this->coinTest("NGN", "USD", 0, 1);
       $this->coinTest("USD", "NGN", 1, 1000);
       $this->coinTest("NGN", "SBD", 0, 1);
       $this->coinTest("SBD", "NGN", 100, 1000);
   }
 
   private function assertRange($val, $left, $right) {
       $this->assertTrue(($val >= $left) && ($val <= $right), $val);
   }
 
   private function coinTest($from, $to, $left, $right) {
       $data = ConvertCoinToCoin($from, $to);
       $arr = explode(" ", $data);
       $this->assertEquals("1", $arr[0]);
       $this->assertEquals($from, $arr[1]);
       $this->assertEquals("=", $arr[2]);
       $this->assertEquals($to, $arr[4]);
       $val = (float)$arr[3];
       $this->assertTrue(($val >= $left) && ($val <= $right), $val);
   }
}