如果我没有记错的话，使用behavior-based test，您希望像here示例那样编写测试

class SetSpec extends AnyWordSpec {

  // Describe a scope for a subject, in this case: "A Set"
  "A Set" can { // All tests within these curly braces are about "A Set"

    // Can describe nested scopes that "narrow" its outer scopes
    "empty" should { // All tests within these curly braces are about "A Set (when empty)"

      "have size 0" in {    // Here, 'it' refers to "A Set (when empty)". The full name
        assert(Set.empty.size == 0) // of this test is: "A Set (when empty) should have size 0"
      }
      "produce NoSuchElementException when head is invoked" in { // Define another test
        intercept[NoSuchElementException] {
          Set.empty.head
        }
      }
      "should be empty" ignore { // To ignore a test, change 'it' to 'ignore'...
        assert(Set.empty.isEmpty)
      }
    }

    // Describe a second nested scope that narrows "A Set" in a different way
    "non-empty" should { // All tests within these curly braces are about "A Set (when non-empty)"

      "have the correct size" in { // Here, 'it' refers to "A Set (when non-empty)". This test's full
        assert(Set(1, 2, 3).size == 3)     // name is: "A Set (when non-empty) should have the correct size"
      }
      // Define a pending test by using (pending) for the body
      "return a contained value when head is invoked" is (pending)
      import tagobjects.Slow
      "be non-empty" taggedAs (Slow) in { // Tag a test by placing a tag object after the test name
        assert(Set(1, 2, 3).nonEmpty)
      }
    }
  }
}

如果这是您想要的，您将能够看到您可以使用不同的风格mix different traits来编写测试。另外，根据您选择的是哪一个，测试的输出也会不同。
scalatest还提供了一个丰富的DSL，可以让您编写接近自然语言的测试。您可以使用提供不同方法的matchers，如have、be、contains等