--- a/build.gradle	Wed Nov 08 16:43:53 2017 +0900
+++ b/build.gradle	Wed Nov 08 18:10:41 2017 +0900
@@ -9,42 +9,28 @@
     mavenCentral()
 }
 
-dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.12'
-}
-group 'FileWrite'
-version '1.0-SNAPSHOT'
-
-apply plugin: 'java'
-
-sourceCompatibility = 1.8
-
-repositories {
-    mavenCentral()
-}
+defaultTasks 'test'
 
 dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.12'
-}
-group 'FileWrite'
-version '1.0-SNAPSHOT'
-
-apply plugin: 'java'
-
-sourceCompatibility = 1.8
-
-repositories {
-    mavenCentral()
+    testCompile("org.junit.jupiter:junit-jupiter-api:5.0.0")
+    testRuntime("org.junit.jupiter:junit-jupiter-engine:5.0.0")
 }
 
-dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.12'
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.1'
+    }
 }
+apply plugin: 'org.junit.platform.gradle.plugin'
+
+
 compileJava {
     options.compilerArgs << "-Werror"
 }
 jar {
-    // from configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
     manifest {
         attributes  "Main-Class": "jp.ac.uryukyu.ie.e165725.FileWrite"
         attributes 'Implementation-Title': 'Gradle Quickstart', 'Implementation-Version': version

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/java/jp/ac/uryukyu/ie/e165725/FileWriteTest.java	Wed Nov 08 18:10:41 2017 +0900
@@ -0,0 +1,17 @@
+package jp.ac.uryukyu.ie.e165725;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class FileWriteTest {
+    @Test
+    void getops() {
+        FileWrite fw = new FileWrite();
+        String[] args = {"-b","--size","1234"};
+        fw.getops(args);
+        assertEquals(fw.getWriteSize(),1234);
+        assertEquals(fw.isBuffering(),true);
+        //assertEquals(fw.isBuffering(),false);   //failed
+    }
+
+}
\ No newline at end of file