Simplified two tests

Author: castarco

tests/Decimal/DecimalFromFloatTest.php

@@ -1,6 +1,7 @@
 <?php
 
 use Litipk\BigNumbers\Decimal as Decimal;
+use Litipk\Exceptions\InvalidArgumentTypeException as InvalidArgumentTypeException;
 
 
 date_default_timezone_set('UTC');
@@ -20,27 +21,21 @@ public function testInfinites()
         $this->assertTrue($nInf->isNegative());
     }
 
+    /**
+     * @expectedException \DomainException
+     * @expectedExceptionMessage To ensure consistency, this class doesn't handle NaN objects.
+     */
     public function testNaN()
     {
-        $catched = false;
-        try {
-            Decimal::fromFloat(INF - INF);
-        } catch (\DomainException $e) {
-            $catched = true;
-        }
-        $this->assertTrue($catched);
+        Decimal::fromFloat(INF - INF);
     }
 
+    /**
+     * @expectedException Litipk\Exceptions\InvalidArgumentTypeException
+     * @expectedExceptionMessage $fltValue must be of type float
+     */
     public function testNoFloat()
     {
-        $catched = false;
-
-        try {
-            $n = Decimal::fromFloat(5);
-        } catch (Exception $e) {
-            $catched = true;
-        }
-
-        $this->assertTrue($catched);
+        Decimal::fromFloat(5);
     }
 }