Test for defaultExpression with updates

ExposedDbExpression.kt

@Test
    fun testDefaultExpressions02() {
        val foo = object : IntIdTable("foo") {
            val name = text("name")
            val defaultDateTime = datetime("defaultDateTime").defaultExpression(CurrentDateTime())
        }

        val nonDefaultDate = DateTime.parse("2000-01-01")

        withTables(foo) {
            val id = foo.insertAndGetId {
                it[foo.name] = "bar"
                it[foo.defaultDateTime] = nonDefaultDate
            }

            val result = foo.select { foo.id eq id }.single()

            assertEquals("bar", result[foo.name])
            assertEquals(nonDefaultDate.millis, result[foo.defaultDateTime].withTimeAtStartOfDay().millis)

            foo.update({foo.id eq id}) {
                it[foo.name] = "baz"
            }

            val result2 = foo.select { foo.id eq id }.single()
            assertEquals("baz", result2[foo.name])
            assertEquals(nonDefaultDate, result2[foo.defaultDateTime].withTimeAtStartOfDay())
        }
    }