@RunWith(JUnitPlatform::class)
class ExpressionFunctionTest : Spek({

  describe("one line function rule") {

    it("have to specify the return type") {

      val rule = ExpressionFunctionRule()
      assertThat(rule.lint(
          """
            fun add(a: Int, b: Int): Int = a + b
          """
              .trimIndent())
      ).isEqualTo(emptyList<LintError>())

      assertThat(rule.lint(
          """
            fun add(a: Int, b: Int) = a + b
          """
              .trimIndent())
      ).isEqualTo(listOf(LintError(1, 1, "one-line-function", "need return type!!!")))

    }
  }
})