iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BAEL-1840 Builder Pattern in Kotlin (#4730) 

* builder pattern in kotlin

* builder pattern in kotlin new-line

* deleted Sandbox, added unit test

* add other tests

* named and default parameters builder

* Make FoodOrderNamed a data class
This commit is contained in:
freddyaott 2018-08-03 04:11:35 +02:00 committed by pauljervis
parent 3b0fef0266
commit 4aa77eb55d
4 changed files with 193 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
core-kotlin/src/main/kotlin/com/baeldung/builder/FoodOrder.kt Normal file
View File

@ -0,0 +1,39 @@
package com.baeldung.builder
class FoodOrder private constructor(builder: FoodOrder.Builder) {
val bread: String?
val condiments: String?
val meat: String?
val fish: String?
init {
this.bread = builder.bread
this.condiments = builder.condiments
this.meat = builder.meat
this.fish = builder.fish
}
class Builder {
var bread: String? = null
private set
var condiments: String? = null
private set
var meat: String? = null
private set
var fish: String? = null
private set
fun bread(bread: String) = apply { this.bread = bread }
fun condiments(condiments: String) = apply { this.condiments = condiments }
fun meat(meat: String) = apply { this.meat = meat }
fun fish(fish: String) = apply { this.fish = fish }
fun build() = FoodOrder(this)
}
}

8
core-kotlin/src/main/kotlin/com/baeldung/builder/FoodOrderApply.kt Normal file
View File

@ -0,0 +1,8 @@
package com.baeldung.builder
class FoodOrderApply {
var bread: String? = null
var condiments: String? = null
var meat: String? = null
var fish: String? = null
}

7
core-kotlin/src/main/kotlin/com/baeldung/builder/FoodOrderNamed.kt Normal file
View File

@ -0,0 +1,7 @@
package com.baeldung.builder
data class FoodOrderNamed(
val bread: String? = null,
val condiments: String? = null,
val meat: String? = null,
val fish: String? = null)

139
core-kotlin/src/test/kotlin/com/baeldung/builder/BuilderPatternUnitTest.kt Normal file
View File

@ -0,0 +1,139 @@
package com.baeldung.builder
import org.junit.jupiter.api.Assertions
import org.junit.jupiter.api.Test
internal class BuilderPatternUnitTest {
@Test
fun whenBuildingFoodOrderSettingValues_thenFieldsNotNull() {
val foodOrder = FoodOrder.Builder()
.bread("white bread")
.meat("bacon")
.fish("salmon")
.condiments("olive oil")
.build()
Assertions.assertNotNull(foodOrder.bread)
Assertions.assertNotNull(foodOrder.meat)
Assertions.assertNotNull(foodOrder.condiments)
Assertions.assertNotNull(foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderSettingValues_thenFieldsContainsValues() {
val foodOrder = FoodOrder.Builder()
.bread("white bread")
.meat("bacon")
.fish("salmon")
.condiments("olive oil")
.build()
Assertions.assertEquals("white bread", foodOrder.bread)
Assertions.assertEquals("bacon", foodOrder.meat)
Assertions.assertEquals("olive oil", foodOrder.condiments)
Assertions.assertEquals("salmon", foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderWithoutSettingValues_thenFieldsNull() {
val foodOrder = FoodOrder.Builder()
.build()
Assertions.assertNull(foodOrder.bread)
Assertions.assertNull(foodOrder.meat)
Assertions.assertNull(foodOrder.condiments)
Assertions.assertNull(foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderNamedSettingValues_thenFieldsNotNull() {
val foodOrder = FoodOrderNamed(
meat = "bacon",
fish = "salmon",
condiments = "olive oil",
bread = "white bread"
)
Assertions.assertNotNull(foodOrder.bread)
Assertions.assertNotNull(foodOrder.meat)
Assertions.assertNotNull(foodOrder.condiments)
Assertions.assertNotNull(foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderNamedSettingValues_thenFieldsContainsValues() {
val foodOrder = FoodOrderNamed(
meat = "bacon",
fish = "salmon",
condiments = "olive oil",
bread = "white bread"
)
Assertions.assertEquals("white bread", foodOrder.bread)
Assertions.assertEquals("bacon", foodOrder.meat)
Assertions.assertEquals("olive oil", foodOrder.condiments)
Assertions.assertEquals("salmon", foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderNamedWithoutSettingValues_thenFieldsNull() {
val foodOrder = FoodOrderNamed()
Assertions.assertNull(foodOrder.bread)
Assertions.assertNull(foodOrder.meat)
Assertions.assertNull(foodOrder.condiments)
Assertions.assertNull(foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderApplySettingValues_thenFieldsNotNull() {
val foodOrder = FoodOrderApply().apply {
meat = "bacon"
fish = "salmon"
condiments = "olive oil"
bread = "white bread"
}
Assertions.assertNotNull(foodOrder.bread)
Assertions.assertNotNull(foodOrder.meat)
Assertions.assertNotNull(foodOrder.condiments)
Assertions.assertNotNull(foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderApplySettingValues_thenFieldsContainsValues() {
val foodOrder = FoodOrderApply().apply {
meat = "bacon"
fish = "salmon"
condiments = "olive oil"
bread = "white bread"
}
Assertions.assertEquals("white bread", foodOrder.bread)
Assertions.assertEquals("bacon", foodOrder.meat)
Assertions.assertEquals("olive oil", foodOrder.condiments)
Assertions.assertEquals("salmon", foodOrder.fish)
}
@Test
fun whenBuildingFoodOrderApplyWithoutSettingValues_thenFieldsNull() {
val foodOrder = FoodOrderApply()
Assertions.assertNull(foodOrder.bread)
Assertions.assertNull(foodOrder.meat)
Assertions.assertNull(foodOrder.condiments)
Assertions.assertNull(foodOrder.fish)
}
}