Inside Tests_Professional Scala-QQ阅读男生历史网

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Inside Tests

Now let's look at a simple test:

package com.packt.courseware.l1
import org.scalatest.FunSuite

class ExampleSpec extends FunSuite {

  test("example test  should pass") {
     assert(1==1)
  }

}

Here, we define a class which is inherited from scalatest FunSuite.

The test expression is called. When the FunSuite class is initialized and added to a set of tests, the test with name example test should pass and assert an expression as an argument. For now, this looks like magic, but we will show you how to build such DSLs in the next chapter.

Let's run our test with the help of sbt:

sbt test

This command will run all tests and evaluate the test expression.

Now, we'll add another test.

Add one more test to the same file: src/test/scala/com/packt/courseware/l1/ExampleSpec.scala in 2-project

We write one trivial test, which asserts the false expression:

      test("trivial")  {
            assert(false)
       }

Run the test and look at error reporting.

Invert the expression in assert so that the test passes:

      test("trivial")  {
            assert(true)
       }

Run the sbt test again to ensure that all of the tests pass.