public function testGetAttribute()
 {
     $attribute = 'grouping_used';
     $style = 'decimal';
     $locale = 'fr_CA';
     $expectedResult = 1;
     $this->formatter->expects($this->once())->method('getAttribute')->with($attribute, $style, $locale)->will($this->returnValue($expectedResult));
     $this->assertEquals($expectedResult, $this->extension->getAttribute($attribute, $style, $locale));
 }