Testing negative amounts.

Author: judgej

tests/Omnipay/Common/Message/AbstractRequestTest.php

@@ -87,12 +87,18 @@ public function testAmountWithEmpty()
         $this->assertSame(null, $this->request->getAmount());
     }
 
-    public function testAmountZero()
+    public function testAmountZeroFloat()
     {
         $this->assertSame($this->request, $this->request->setAmount(0.0));
         $this->assertSame('0.00', $this->request->getAmount());
     }
 
+    public function testAmountZeroString()
+    {
+        $this->assertSame($this->request, $this->request->setAmount('0.0'));
+        $this->assertSame('0.00', $this->request->getAmount());
+    }
+
     public function testGetAmountNoDecimals()
     {
         $this->assertSame($this->request, $this->request->setCurrency('JPY'));
@@ -163,6 +169,24 @@ public function testAmountInvalidFormatThrowsException()
         $this->request->getAmount();
     }
 
+    /**
+     * @expectedException Omnipay\Common\Exception\InvalidRequestException
+     */
+    public function testAmountNegativeStringThrowsException()
+    {
+        $this->assertSame($this->request, $this->request->setAmount('-123.00'));
+        $this->request->getAmount();
+    }
+
+    /**
+     * @expectedException Omnipay\Common\Exception\InvalidRequestException
+     */
+    public function testAmountNegativeFloatThrowsException()
+    {
+        $this->assertSame($this->request, $this->request->setAmount(-123.00));
+        $this->request->getAmount();
+    }
+
     public function testCurrency()
     {
         $this->assertSame($this->request, $this->request->setCurrency('USD'));