Home

Welcome to the scalaKoansOnline wiki!

Q. How to validate the koans?

A. Evaluate the koan code with Twitter's eval-util. For background, see: Why Config?.

Q. What does a koan look like?

A. Included below.

package org.functionalkoans.forscala

import org.scalatest.matchers.ShouldMatchers import support.KoanSuite

// meditate on AboutAsserts to see how the Scala Koans work class AboutAsserts extends KoanSuite with ShouldMatchers {

koan("asserts can take a boolean argument") { assert(true) // should be true }

koan("asserts can include a message") { assert(true, "This should be true") }

koan("true and false values can be compared with should matchers") { true should be(true) // should be true }

koan("booleans in asserts can test equality") { val v1 = 4 val v2 = 4 assert(v1 === __) }

koan("sometimes we expect you to fill in the values") { assert(__ == 1 + 1) } }