refactored Builder pattern

src/main/kotlin/design_patterns/Builder.kt

@@ -28,10 +28,9 @@ class Pony1 {
         this.city = city
     }
 
-    fun name() = name
-    fun family() = family
-    fun cutieMark() = cutieMark
-    fun city() = city
+    override fun toString(): String {
+        return "$name, $family, $cutieMark, $city"
+    }
 
     class Builder {
             private var name: String = ""
@@ -73,10 +72,9 @@ class Pony2 {
     private var cutieMark: String = ""
     private var city: String = ""
 
-    fun name() = name
-    fun family() = family
-    fun cutieMark() = cutieMark
-    fun city() = city
+    override fun toString(): String {
+        return "$name, $family, $cutieMark, $city"
+    }
 
     companion object {
         fun newBuilder() = Pony2().Builder()
@@ -117,8 +115,7 @@ class Pony3(
     private var cutieMark: String = "",
     private var city: String = ""
 ) {
-    fun name() = name
-    fun family() = family
-    fun cutieMark() = cutieMark
-    fun city() = city
+    override fun toString(): String {
+        return "$name, $family, $cutieMark, $city"
+    }
 }

src/test/kotlin/design_patterns/BuilderTest.kt

@@ -19,10 +19,7 @@ internal class BuilderTest {
             .changeFamily(family)
             .build()
 
-        assertEquals(name, pony.name())
-        assertEquals(cutieMark, pony.cutieMark())
-        assertEquals(city, pony.city())
-        assertEquals(family, pony.family())
+        assertEquals("$name, $family, $cutieMark, $city", pony.toString())
     }
 
     @Test
@@ -39,10 +36,7 @@ internal class BuilderTest {
             .changeFamily(family)
             .build()
 
-        assertEquals(name, pony.name())
-        assertEquals(cutieMark, pony.cutieMark())
-        assertEquals(city, pony.city())
-        assertEquals(family, pony.family())
+        assertEquals("$name, $family, $cutieMark, $city", pony.toString())
     }
 
     @Test
@@ -54,12 +48,7 @@ internal class BuilderTest {
 
         val pony = Pony3(name, family, city = city)
 
-        assertEquals(name, pony.name())
-        assertEquals("", pony.cutieMark())
-        assertEquals(city, pony.city())
-        assertEquals(family, pony.family())
+        assertEquals("$name, $family, , $city", pony.toString())
     }
 
-
-
 }