diff --git a/unitTests/PHPExcel/Calculation/FunctionsTest.php b/unitTests/PHPExcel/Calculation/FunctionsTest.php
index cde9041..e920686 100644
--- a/unitTests/PHPExcel/Calculation/FunctionsTest.php
+++ b/unitTests/PHPExcel/Calculation/FunctionsTest.php
@@ -63,4 +63,212 @@ class FunctionsTest extends PHPUnit_Framework_TestCase
 		$this->assertEquals('#VALUE!', $result);
 	}
 
+    /**
+     * @dataProvider providerIS_BLANK
+     */
+	public function testIS_BLANK()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_BLANK'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_BLANK()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_BLANK.data');
+	}
+
+    /**
+     * @dataProvider providerIS_ERR
+     */
+	public function testIS_ERR()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_ERR'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_ERR()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_ERR.data');
+	}
+
+    /**
+     * @dataProvider providerIS_ERROR
+     */
+	public function testIS_ERROR()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_ERROR'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_ERROR()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_ERROR.data');
+	}
+
+    /**
+     * @dataProvider providerERROR_TYPE
+     */
+	public function testERROR_TYPE()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','ERROR_TYPE'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerERROR_TYPE()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/ERROR_TYPE.data');
+	}
+
+    /**
+     * @dataProvider providerIS_LOGICAL
+     */
+	public function testIS_LOGICAL()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_LOGICAL'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_LOGICAL()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_LOGICAL.data');
+	}
+
+    /**
+     * @dataProvider providerIS_NA
+     */
+	public function testIS_NA()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_NA'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_NA()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_NA.data');
+	}
+
+    /**
+     * @dataProvider providerIS_NUMBER
+     */
+	public function testIS_NUMBER()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_NUMBER'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_NUMBER()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_NUMBER.data');
+	}
+
+    /**
+     * @dataProvider providerIS_TEXT
+     */
+	public function testIS_TEXT()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_TEXT'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_TEXT()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_TEXT.data');
+	}
+
+    /**
+     * @dataProvider providerIS_NONTEXT
+     */
+	public function testIS_NONTEXT()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_NONTEXT'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_NONTEXT()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_NONTEXT.data');
+	}
+
+    /**
+     * @dataProvider providerIS_EVEN
+     */
+	public function testIS_EVEN()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_EVEN'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_EVEN()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_EVEN.data');
+	}
+
+    /**
+     * @dataProvider providerIS_ODD
+     */
+	public function testIS_ODD()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','IS_ODD'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerIS_ODD()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/IS_ODD.data');
+	}
+
+    /**
+     * @dataProvider providerTYPE
+     */
+	public function testTYPE()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','TYPE'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerTYPE()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/TYPE.data');
+	}
+
+    /**
+     * @dataProvider providerN
+     */
+	public function testN()
+	{
+		$args = func_get_args();
+		$expectedResult = array_pop($args);
+		$result = call_user_func_array(array('PHPExcel_Calculation_Functions','N'),$args);
+		$this->assertEquals($expectedResult, $result, NULL, 1E-8);
+	}
+
+    public function providerN()
+    {
+    	return new testDataFileIterator('rawTestData/Calculation/Functions/N.data');
+	}
+
 }