public function testValueByIntrospect() {
		$expected = "'string'";
		$result = $this->db->value("string");
		$this->assertTrue(is_string($result));
		$this->assertEqual($expected, $result);

		$expected = "'\'this string is escaped\''";
		$result = $this->db->value("'this string is escaped'");
		$this->assertTrue(is_string($result));
		$this->assertEqual($expected, $result);

		$this->assertIdentical(1, $this->db->value(true));
		$this->assertIdentical(1, $this->db->value('1'));
		$this->assertIdentical(1.1, $this->db->value('1.1'));
	}