Step1 : 코틀린 DSL 실습 (#581)

Author: bsgreentea

src/test/kotlin/DslTest.kt

@@ -0,0 +1,98 @@
+import io.kotest.matchers.collections.shouldContain
+import io.kotest.matchers.collections.shouldContainInOrder
+import io.kotest.matchers.shouldBe
+import org.junit.jupiter.api.Test
+
+class DslTest {
+    @Test
+    fun dslTest() {
+        val person = introduce {
+            name("greentea.latte")
+            company("kakao")
+            skills {
+                soft("A passion for problem solving")
+                soft("Good communication skills")
+                hard("Kotlin")
+            }
+            languages {
+                "Korean" level 5
+                "English" level 3
+            }
+        }
+
+        with(person) {
+            name shouldBe "greentea.latte"
+            company shouldBe "kakao"
+            softSkills shouldContainInOrder listOf(
+                "A passion for problem solving",
+                "Good communication skills"
+            )
+            hardSkills shouldContain "Kotlin"
+            languageLevels shouldContainInOrder listOf(
+                "Korean" to 5,
+                "English" to 3,
+            )
+        }
+    }
+
+}
+
+fun introduce(block: PersonBuilder.() -> Unit): Person {
+    return PersonBuilder().apply(block).build()
+}
+
+class PersonBuilder {
+    private lateinit var name: String
+    private lateinit var company: String
+
+    private val softSkills = mutableListOf<String>()
+    private val hardSkills = mutableListOf<String>()
+
+    private val languageLevels = mutableListOf<Pair<String, Int>>()
+
+    fun name(value: String) {
+        name = value
+    }
+
+    fun company(value: String) {
+        company = value
+    }
+
+    fun skills(block: PersonBuilder.() -> Unit): PersonBuilder {
+        return this.apply(block)
+    }
+
+    fun soft(value: String) {
+        softSkills.add(value)
+    }
+
+    fun hard(value: String) {
+        hardSkills.add(value)
+    }
+
+    fun languages(block: PersonBuilder.() -> Unit): PersonBuilder {
+        return this.apply(block)
+    }
+
+    infix fun String.level(s: Int) {
+        languageLevels.add(Pair(this, s))
+    }
+
+    fun build(): Person {
+        return Person(
+            name,
+            company,
+            softSkills,
+            hardSkills,
+            languageLevels,
+        )
+    }
+}
+
+data class Person(
+    val name: String,
+    val company: String?,
+    val softSkills: List<String>,
+    val hardSkills: List<String>,
+    val languageLevels: List<Pair<String, Int>>,
+)