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Scala 35 class composition with traits #99

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Merged
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Jun 3, 2020
Merged

Scala 35 class composition with traits #99

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10 changes: 8 additions & 2 deletions ...lasscompositionwithtraits/CarTraits.scala → ...lasscompositionwithtraits/CarTraits.scala
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Original file line number Diff line number Diff line change
@@ -1,7 +1,5 @@
package com.baeldung.scala.classcompositionwithtraits

import com.baeldung.scala.classcompositionwithtraits.CarTraits.{Car, Printable}

object CarTraits {

/**
Expand All @@ -22,6 +20,14 @@ object CarTraits {
/**
* Another trait to be mixed into the class
*/
trait SimpleMarshaller extends Car {
def toJson: String = s"{${"\"model\""}:$model," +
s"\n${"\"horsePower\""}:$horsePower}"
}

/**
* Another trait with self-type to be mixed into the class
*/
trait Marshaller {
self: Car =>
def toJson = s"{${"\"model\""}:$model," +
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13 changes: 10 additions & 3 deletions ...asscompositionwithtraits/TraitsTest.scala → ...compositionwithtraits/CarTraitsTest.scala
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Original file line number Diff line number Diff line change
@@ -1,14 +1,13 @@
package com.baeldung.scala.classcompositionwithtraits

import com.baeldung.scala.classcompositionwithtraits.CarTraits._
import org.scalatest.{Matchers, WordSpec}

/**
* @author Sergey Ionin
*/

class TraitsTest extends WordSpec with Matchers {

import com.baeldung.scala.classcompositionwithtraits.CarTraits._
class CarTraitsTest extends WordSpec with Matchers {

"Class that extends Car" should {
"inherit abstract class fields" in {
Expand All @@ -28,6 +27,14 @@ class TraitsTest extends WordSpec with Matchers {
}
}

"Classes that extends Car with SimpleMarshaller" should {
"inherit abstract class fields and methods" +
"and be marshallable" in {
val bmw0 = new BMW0("F15", 309) with SimpleMarshaller
bmw0.toJson shouldBe "{\"model\":F15,\n\"horsePower\":309}"
}
}

"Classes that extends Car with Marshaller" should {
"inherit abstract class fields and methods" +
"and be marshallable" in {
Expand Down