Bug 54723: Support for percentage in VALUE() function

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1514799 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/ss/formula/functions/Value.java

  * properly the result is <b>#VALUE!</b> error. Blank string converts to zero.
  *
  * @author Josh Micich
+ * @author Cédric Walter
  */
 public final class Value extends Fixed1ArgFunction {
 
 		boolean foundCurrency = false;
 		boolean foundUnaryPlus = false;
 		boolean foundUnaryMinus = false;
+		boolean foundPercentage = false;
 
 		int len = strText.length();
 		int i;
 			}
 			switch (ch) {
 				case ' ':
-					String remainingText = strText.substring(i);
-					if (remainingText.trim().length() > 0) {
+					String remainingTextTrimmed = strText.substring(i).trim();
+                    // support for value[space]%
+                    if (remainingTextTrimmed.equals("%")) {
+                        foundPercentage= true;
+                        break;
+                    }
+                    if (remainingTextTrimmed.length() > 0) {
 						// intervening spaces not allowed once the digits start
 						return null;
 					}
 					sb.append(strText.substring(i));
 					i = len;
 					break;
+                case '%':
+                    foundPercentage = true;
+                    break;
 				default:
 					// all other characters are illegal
 					return null;
 			// still a problem parsing the number - probably out of range
 			return null;
 		}
-		return new Double(foundUnaryMinus ? -d : d);
+        Double result = new Double(foundUnaryMinus ? -d : d);
+        return foundPercentage ? result /100 : result;
 	}
 }

src/testcases/org/apache/poi/ss/formula/functions/TestValue.java

  * Tests for {@link Value}
  *
  * @author Josh Micich
+ * @author Cédric Walter
  */
 public final class TestValue extends TestCase {
 
 		confirmValue("1,000e2", 100000);
 		confirmValue("$10e2", 1000);
 		confirmValue("$1,000e2", 100000);
+        confirmValue("30%", 0.3);
+        confirmValue("30 %", 0.3);
 	}
 
 	public void testErrors() {