From 312d400566c75248f26eb076ae50d86d24443ec2 Mon Sep 17 00:00:00 2001
From: hyunwooj <hyunwooj@toss.im>
Date: Sun, 11 Jun 2023 19:44:21 +0900
Subject: [PATCH] step1: kotlin basics

---
 src/main/kotlin/.gitkeep            |  0
 src/main/kotlin/step1/Person.kt     |  7 ++++
 src/test/kotlin/.gitkeep            |  0
 src/test/kotlin/step1/PersonTest.kt | 51 +++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+)
 delete mode 100644 src/main/kotlin/.gitkeep
 create mode 100644 src/main/kotlin/step1/Person.kt
 delete mode 100644 src/test/kotlin/.gitkeep
 create mode 100644 src/test/kotlin/step1/PersonTest.kt

diff --git a/src/main/kotlin/.gitkeep b/src/main/kotlin/.gitkeep
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/src/main/kotlin/step1/Person.kt b/src/main/kotlin/step1/Person.kt
new file mode 100644
index 0000000000..9a683953d0
--- /dev/null
+++ b/src/main/kotlin/step1/Person.kt
@@ -0,0 +1,7 @@
+package step1
+
+data class Person(
+    val name: String,
+    val age: Int? = null,
+    var nickname: String? = null,
+)
diff --git a/src/test/kotlin/.gitkeep b/src/test/kotlin/.gitkeep
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/src/test/kotlin/step1/PersonTest.kt b/src/test/kotlin/step1/PersonTest.kt
new file mode 100644
index 0000000000..ad2d3e3dd9
--- /dev/null
+++ b/src/test/kotlin/step1/PersonTest.kt
@@ -0,0 +1,51 @@
+package step1
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertAll
+
+class PersonTest {
+    val name = "김철수"
+    val age = 20
+    val nickname = "아이언워터"
+    @Test
+    internal fun `named arguments`() {
+        val people = listOf(
+            Person(name, age, nickname),
+            Person(name, age, nickname = nickname),
+            Person(name = name, nickname = nickname, age = age),
+        )
+        assertThat(people).allSatisfy {
+            assertThat(it.name).isEqualTo(name)
+            assertThat(it.age).isEqualTo(age)
+            assertThat(it.nickname).isEqualTo(nickname)
+        }
+    }
+
+    @Test
+    internal fun `nullable types`() {
+        val person = Person(name, null, null)
+        assertAll(
+            { assertThat(person.name).isEqualTo(name) },
+            { assertThat(person.age).isNull() },
+            { assertThat(person.nickname).isNull() },
+        )
+    }
+
+    @Test
+    internal fun `default arguments`() {
+        val person = Person(name)
+        assertAll(
+            { assertThat(person.name).isEqualTo(name) },
+            { assertThat(person.age).isNull() },
+            { assertThat(person.nickname).isNull() },
+        )
+    }
+
+    @Test
+    internal fun `data classes`() {
+        val person1 = Person(name, age, nickname)
+        val person2 = Person(name, age, nickname)
+        assertThat(person1).isEqualTo(person2)
+    }
+}