问题描述
我找到了一些简单的例子,但是没有用。
模型:
class Product() {
var price: Int = 0
var stock: Int = 0
def addPrice(price: Int): Int = {
this.price = price
this.price
}
def addStock(qty: Int): Int = {
this.stock += qty
this.stock
}
}
和我的考试班
classproductSpec extends AnyFlatSpec with MockFactory with OneInstancePerTest {
val m = mock[Product]
// suites (test examples)
inAnyOrder {
(m.addPrice _).expects(40).returns(40).once
inSequence {
(m.addStock _).expects(20).returns(20).once
(m.addStock _).expects(10).returns(30).once
}
}
// tests
it should "set price" in {
assert(m.addPrice(40) == 40)
}
it should "add new qty. Step 1" in {
assert(m.addStock(20) == 20)
}
it should "add new qty. Step 2" in {
assert(m.addStock(10) == 30)
}
}
每次,错误是:
Expected:
inAnyOrder {
inAnyOrder {
<mock-1> Product.addPrice(40) once (never called - UNSATISFIED)
...
}
}
(m.addPrice _).expects(40).returns(40).once
// tests
it should "set price" in {
assert(m.addPrice(40) == 40)
}
解决方法
让我们解释上面的代码。 inAnyOrder
部分为所有测试定义断言。这意味着,在套件中的每个测试中,您应该只调用一次:
-
m.addPrice(40)
-
m.addStock(20)
-
m.addStock(10)
而2必须在3之前。因此,每个测试由于缺少2个调用而失败。例如,测试:
it should "add new qty. Step 1" in {
assert(m.addStock(20) == 20)
}
失败,并显示以下消息:
Expected:
inAnyOrder {
inAnyOrder {
<mock-1> Product.addPrice(40) once (never called - UNSATISFIED)
inSequence {
<mock-1> Product.addStock(20) once (called once)
<mock-1> Product.addStock(10) once (never called - UNSATISFIED)
}
}
}
Actual:
<mock-1> Product.addStock(20)
ScalaTestFailureLocation: ProductSpec at (ProductSpec.scala:20)
org.scalatest.exceptions.TestFailedException: Unsatisfied expectation:
因为1和3不满意。
如果您尝试像这样的测试:
it should "set price" in {
assert(m.addPrice(40) == 40)
assert(m.addStock(20) == 20)
assert(m.addStock(10) == 30)
}
它将通过。 请注意,如果您更改2和3的顺序,则相同的测试将失败。