From 5db1c3d8f352ba308ffcab29cba8a11ce2f8e4a3 Mon Sep 17 00:00:00 2001
From: Siben Nayak <sibnayak@amazon.com>
Date: Tue, 3 Apr 2018 15:28:38 +0530
Subject: [PATCH 1/2] [BAEL-1675] Write to a File in Kotlin

---
 .../com/baeldung/filesystem/FileWriter.kt     | 19 +++++++++++
 .../com/baeldung/filesystem/FileWriterTest.kt | 33 +++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
 create mode 100644 core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt

diff --git a/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt b/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
new file mode 100644
index 0000000000..20d9c963c7
--- /dev/null
+++ b/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
@@ -0,0 +1,19 @@
+package com.baeldung.filesystem
+
+import java.io.File
+
+class FileWriter {
+
+    fun writeFileUsingPrintWriter(fileName: String, fileContent: String) =
+        File(fileName).printWriter().use { out -> out.println(fileContent) }
+
+    fun writeFileUsingBufferedWriter(fileName: String, fileContent: String) =
+        File(fileName).bufferedWriter().use { out -> out.write(fileContent) }
+
+    fun writeFileDirectly(fileName: String, fileContent: String) =
+        File(fileName).writeText(fileContent)
+
+    fun writeFileDirectlyAsBytes(fileName: String, fileContent: String) =
+            File(fileName).writeBytes(fileContent.toByteArray())
+
+}
\ No newline at end of file
diff --git a/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt b/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt
new file mode 100644
index 0000000000..43a9957de1
--- /dev/null
+++ b/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt
@@ -0,0 +1,33 @@
+package com.baeldung.filesystem
+
+import org.junit.jupiter.api.Test
+
+internal class FileWriterTest {
+
+    private val fileName = "src/test/resources/Kotlin.out"
+
+    private val fileContent = "Kotlin\nConcise, Safe, Interoperable, Tool-friendly"
+
+    private val fileWriter = FileWriter()
+
+    @Test
+    fun whenWrittenWithPrintWriter_thenCorrect() {
+        fileWriter.writeFileUsingPrintWriter(fileName, fileContent)
+    }
+
+    @Test
+    fun whenWrittenWithBufferedWriter_thenCorrect() {
+        fileWriter.writeFileUsingBufferedWriter(fileName, fileContent)
+    }
+
+    @Test
+    fun whenWrittenDirectly_thenCorrect() {
+        fileWriter.writeFileDirectly(fileName, fileContent)
+    }
+
+    @Test
+    fun whenWrittenDirectlyAsBytes_thenCorrect() {
+        fileWriter.writeFileDirectlyAsBytes(fileName, fileContent)
+    }
+
+}
\ No newline at end of file

From c2d89c8679444fa72fa8b6a00729ee5d33149e11 Mon Sep 17 00:00:00 2001
From: Siben Nayak <sibnayak@amazon.com>
Date: Sat, 5 May 2018 18:24:13 +0530
Subject: [PATCH 2/2] Fixed unit test cases and formatting

---
 .../main/kotlin/com/baeldung/filesystem/FileWriter.kt  |  6 +++---
 .../kotlin/com/baeldung/filesystem/FileWriterTest.kt   | 10 ++++++++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt b/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
index 20d9c963c7..6dc9b95f1f 100644
--- a/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
+++ b/core-kotlin/src/main/kotlin/com/baeldung/filesystem/FileWriter.kt
@@ -5,13 +5,13 @@ import java.io.File
 class FileWriter {
 
     fun writeFileUsingPrintWriter(fileName: String, fileContent: String) =
-        File(fileName).printWriter().use { out -> out.println(fileContent) }
+            File(fileName).printWriter().use { out -> out.print(fileContent) }
 
     fun writeFileUsingBufferedWriter(fileName: String, fileContent: String) =
-        File(fileName).bufferedWriter().use { out -> out.write(fileContent) }
+            File(fileName).bufferedWriter().use { out -> out.write(fileContent) }
 
     fun writeFileDirectly(fileName: String, fileContent: String) =
-        File(fileName).writeText(fileContent)
+            File(fileName).writeText(fileContent)
 
     fun writeFileDirectlyAsBytes(fileName: String, fileContent: String) =
             File(fileName).writeBytes(fileContent.toByteArray())
diff --git a/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt b/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt
index 43a9957de1..91c66a4fee 100644
--- a/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt
+++ b/core-kotlin/src/test/kotlin/com/baeldung/filesystem/FileWriterTest.kt
@@ -1,6 +1,8 @@
 package com.baeldung.filesystem
 
 import org.junit.jupiter.api.Test
+import java.io.File
+import kotlin.test.assertEquals
 
 internal class FileWriterTest {
 
@@ -13,21 +15,29 @@ internal class FileWriterTest {
     @Test
     fun whenWrittenWithPrintWriter_thenCorrect() {
         fileWriter.writeFileUsingPrintWriter(fileName, fileContent)
+
+        assertEquals(fileContent, File(fileName).readText())
     }
 
     @Test
     fun whenWrittenWithBufferedWriter_thenCorrect() {
         fileWriter.writeFileUsingBufferedWriter(fileName, fileContent)
+
+        assertEquals(fileContent, File(fileName).readText())
     }
 
     @Test
     fun whenWrittenDirectly_thenCorrect() {
         fileWriter.writeFileDirectly(fileName, fileContent)
+
+        assertEquals(fileContent, File(fileName).readText())
     }
 
     @Test
     fun whenWrittenDirectlyAsBytes_thenCorrect() {
         fileWriter.writeFileDirectlyAsBytes(fileName, fileContent)
+
+        assertEquals(fileContent, File(fileName).readText())
     }
 
 }
\ No newline at end of file