public function testIsSubset() { $this->assertTrue(CRM_Utils_Array::isSubset(array(), array())); $this->assertTrue(CRM_Utils_Array::isSubset(array('a'), array('a'))); $this->assertTrue(CRM_Utils_Array::isSubset(array('a'), array('b', 'a', 'c'))); $this->assertTrue(CRM_Utils_Array::isSubset(array('b', 'd'), array('a', 'b', 'c', 'd'))); $this->assertFalse(CRM_Utils_Array::isSubset(array('a'), array())); $this->assertFalse(CRM_Utils_Array::isSubset(array('a'), array('b'))); $this->assertFalse(CRM_Utils_Array::isSubset(array('a'), array('b', 'c', 'd'))); }