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@@ -132,13 +132,10 @@ class PHPSpec_Specification
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         }
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         // check for any predicate style matching
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-        $result = preg_match("/^((be)|(have)|(beA)|(haveA)|(haveAn)|(beAn))*/", $method, $matches);
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+        $result = preg_match("/^((?:be|have)A?n?)(.*)/", $method, $matches);
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         if ($result && empty($args) && $this instanceof PHPSpec_Specification_Object) {
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-            $predicate = $matches[0];
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-            $predicateSuffix = substr($method, strlen($predicate));
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-            if (!isset($predicateSuffix) || empty($predicateSuffix)) {
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-            	$predicateSuffix = '';
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-            }
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+            $predicate = $matches[1];
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+            $predicateSuffix = $matches[2];
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             if (strpos($predicate, 'have') !== false) {
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                 $predicateMethodPrefixes = array('has', 'hasA', 'hasAn');
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@@ -369,4 +366,4 @@ class PHPSpec_Specification
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         }
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     }
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-}
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\ No newline at end of file
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+}