Use temporary folder rule in tests rather than temporary files.

Author: raphw

byte-buddy-dep/src/main/java/net/bytebuddy/dynamic/ClassFileLocator.java

@@ -1081,7 +1081,7 @@ class ForFolder implements ClassFileLocator {
          */
         public ForFolder(File folder) throws IOException {
             this.folder = folder;
-            int current = ClassFileVersion.ofThisVm().getMajorVersion();
+            int current = ClassFileVersion.ofThisVm().getJavaVersion();
             if (current < 9) {
                 multiRelease = new int[0];
             } else {

byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineDefaultTest.java

@@ -10,7 +10,9 @@
 import net.bytebuddy.dynamic.scaffold.inline.MethodNameTransformer;
 import net.bytebuddy.implementation.LoadedTypeInitializer;
 import net.bytebuddy.matcher.ElementMatchers;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.mockito.ArgumentMatchers;
@@ -48,6 +50,9 @@ public static Collection<Object[]> data() {
         });
     }
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private final Plugin.Engine.Dispatcher.Factory dispatcherFactory;
 
     private final boolean eager;
@@ -317,7 +322,7 @@ public void testManifest() throws Exception {
 
     @Test
     public void testImplicitFileInput() throws Exception {
-        File file = File.createTempFile("foo", "bar");
+        File file = temporaryFolder.newFile();
         JarOutputStream outputStream = new JarOutputStream(new FileOutputStream(file));
         try {
             outputStream.putNextEntry(new JarEntry("dummy"));
@@ -342,9 +347,7 @@ public Plugin.Engine.Summary answer(InvocationOnMock invocationOnMock) {
 
     @Test
     public void testImplicitFolderInput() throws Exception {
-        File file = File.createTempFile("foo", "bar");
-        assertThat(file.delete(), is(true));
-        assertThat(file.mkdir(), is(true));
+        File file = temporaryFolder.newFolder();
         Plugin.Engine engine = spy(new Plugin.Engine.Default());
         doAnswer(new Answer<Plugin.Engine.Summary>() {
             public Plugin.Engine.Summary answer(InvocationOnMock invocationOnMock) {
@@ -376,8 +379,7 @@ public void testOfEntryPoint() {
 
     @Test
     public void testMain() throws Exception {
-        File source = File.createTempFile("foo", "bar"), target = File.createTempFile("qux", "baz");
-        assertThat(target.delete(), is(true));
+        File source = temporaryFolder.newFile(), target = temporaryFolder.newFile();
         JarOutputStream outputStream = new JarOutputStream(new FileOutputStream(source));
         try {
             outputStream.putNextEntry(new JarEntry("dummy"));

byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceForFolderTest.java

@@ -1,9 +1,10 @@
 package net.bytebuddy.build;
 
 import net.bytebuddy.utility.StreamDrainer;
-import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -19,18 +20,14 @@
 
 public class PluginEngineSourceForFolderTest {
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File folder;
 
     @Before
     public void setUp() throws Exception {
-        folder = File.createTempFile("foo", "bar");
-        assertThat(folder.delete(), is(true));
-        assertThat(folder.mkdir(), is(true));
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(folder.delete(), is(true));
+        folder = temporaryFolder.newFolder();
     }
 
     @Test

byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceForJarFileTest.java

@@ -3,7 +3,9 @@
 import net.bytebuddy.utility.StreamDrainer;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -16,16 +18,14 @@
 
 public class PluginEngineSourceForJarFileTest {
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File file;
 
     @Before
     public void setUp() throws Exception {
-        file = File.createTempFile("foo", "bar");
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(file.delete(), is(true));
+        file = temporaryFolder.newFile();
     }
 
     @Test

byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineTargetForFolderTest.java

@@ -3,11 +3,11 @@
 import net.bytebuddy.description.type.TypeDescription;
 import net.bytebuddy.test.utility.JavaVersionRule;
 import net.bytebuddy.utility.StreamDrainer;
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.MethodRule;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.*;
 import java.util.Collections;
@@ -26,18 +26,14 @@ public class PluginEngineTargetForFolderTest {
     @Rule
     public MethodRule javaVersionRule = new JavaVersionRule();
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File folder;
 
     @Before
     public void setUp() throws Exception {
-        folder = File.createTempFile("foo", "bar");
-        assertThat(folder.delete(), is(true));
-        assertThat(folder.mkdir(), is(true));
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(folder.delete(), is(true));
+        folder = temporaryFolder.newFolder();
     }
 
     @Test
@@ -92,7 +88,7 @@ public void testWriteResourceFromFile() throws Exception {
         Plugin.Engine.Source.Element element = mock(Plugin.Engine.Source.Element.class);
         when(element.getName()).thenReturn(FOO + "/" + BAR);
         when(element.getInputStream()).thenReturn(new ByteArrayInputStream(new byte[]{1, 2, 3}));
-        File original = File.createTempFile("qux", "baz");
+        File original = temporaryFolder.newFile();
         try {
             FileOutputStream outputStream = new FileOutputStream(original);
             try {

byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineTargetForJarFileTest.java

@@ -2,9 +2,10 @@
 
 import net.bytebuddy.description.type.TypeDescription;
 import net.bytebuddy.utility.StreamDrainer;
-import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.ByteArrayInputStream;
 import java.io.File;
@@ -25,16 +26,14 @@ public class PluginEngineTargetForJarFileTest {
 
     private static final String FOO = "foo", BAR = "bar";
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File file;
 
     @Before
     public void setUp() throws Exception {
-        file = File.createTempFile("foo", "bar");
-        assertThat(file.delete(), is(true));
-    }
-
-    @After
-    public void tearDown() throws Exception {
+        file = temporaryFolder.newFile();
         assertThat(file.delete(), is(true));
     }
 

byte-buddy-dep/src/test/java/net/bytebuddy/dynamic/ClassFileLocatorForFolderTest.java

@@ -5,6 +5,7 @@
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -24,19 +25,14 @@ public class ClassFileLocatorForFolderTest {
     @Rule
     public JavaVersionRule javaVersionRule = new JavaVersionRule();
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File folder;
 
     @Before
     public void setUp() throws Exception {
-        File file = File.createTempFile(FOO, BAR);
-        assertThat(file.delete(), is(true));
-        folder = new File(file.getParentFile(), FOO + new Random().nextInt());
-        assertThat(folder.mkdir(), is(true));
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(folder.delete(), is(true));
+        folder = temporaryFolder.newFolder();
     }
 
     @Test
@@ -56,8 +52,6 @@ public void testSuccessfulLocation() throws Exception {
         ClassFileLocator.Resolution resolution = classFileLocator.locate(FOO + "." + BAR);
         assertThat(resolution.isResolved(), is(true));
         assertThat(resolution.resolve(), is(new byte[]{VALUE, VALUE * 2}));
-        assertThat(file.delete(), is(true));
-        assertThat(packageFolder.delete(), is(true));
     }
 
     @Test
@@ -77,22 +71,17 @@ public void testClose() throws Exception {
     public void testSuccessfulVersionLocation() throws Exception {
         File metaInf = new File(folder, "META-INF");
         assertThat(metaInf.mkdir(), is(true));
-        File manifestMf = new File(metaInf, "MANIFEST.MF");
         Manifest manifest = new Manifest();
         manifest.getMainAttributes().putValue("Manifest-Version", "1.0");
         manifest.getMainAttributes().putValue("Multi-Release", "true");
-        OutputStream outputStream = new FileOutputStream(manifestMf);
+        OutputStream outputStream = new FileOutputStream(new File(metaInf, "MANIFEST.MF"));
         try {
             manifest.write(outputStream);
         } finally {
             outputStream.close();
         }
-        File versions = new File(metaInf, "versions");
-        assertThat(versions.mkdir(), is(true));
-        File version = new File(versions, "9");
-        assertThat(version.mkdir(), is(true));
-        File packageFolder = new File(version, FOO);
-        assertThat(packageFolder.mkdir(), is(true));
+        File packageFolder = new File(metaInf, "versions/9/" + FOO);
+        assertThat(packageFolder.mkdirs(), is(true));
         File file = new File(packageFolder, BAR + ".class");
         assertThat(file.createNewFile(), is(true));
         outputStream = new FileOutputStream(file);
@@ -106,11 +95,5 @@ public void testSuccessfulVersionLocation() throws Exception {
         ClassFileLocator.Resolution resolution = classFileLocator.locate(FOO + "." + BAR);
         assertThat(resolution.isResolved(), is(true));
         assertThat(resolution.resolve(), is(new byte[]{VALUE, VALUE * 2}));
-        assertThat(file.delete(), is(true));
-        assertThat(packageFolder.delete(), is(true));
-        assertThat(version.delete(), is(true));
-        assertThat(versions.delete(), is(true));
-        assertThat(manifestMf.delete(), is(true));
-        assertThat(metaInf.delete(), is(true));
     }
 }

byte-buddy-dep/src/test/java/net/bytebuddy/dynamic/ClassFileLocatorForJarFileTest.java

@@ -7,6 +7,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.MethodRule;
+import org.junit.rules.TemporaryFolder;
 import org.objectweb.asm.ClassVisitor;
 
 import java.io.File;
@@ -28,16 +29,14 @@ public class ClassFileLocatorForJarFileTest {
     @Rule
     public MethodRule javaVersionRule = new JavaVersionRule();
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File file;
 
     @Before
     public void setUp() throws Exception {
-        file = File.createTempFile(FOO, BAR);
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(file.delete(), is(true));
+        file = temporaryFolder.newFile();
     }
 
     @Test

byte-buddy-dep/src/test/java/net/bytebuddy/dynamic/ClassFileLocatorForModuleFileTest.java

@@ -1,11 +1,11 @@
 package net.bytebuddy.dynamic;
 
 import net.bytebuddy.test.utility.JavaVersionRule;
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.MethodRule;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.Closeable;
 import java.io.File;
@@ -27,16 +27,14 @@ public class ClassFileLocatorForModuleFileTest {
     @Rule
     public MethodRule javaVersionRule = new JavaVersionRule();
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File file;
 
     @Before
     public void setUp() throws Exception {
-        file = File.createTempFile(FOO, BAR);
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(file.delete(), is(true));
+        file = temporaryFolder.newFile();
     }
 
     @Test

byte-buddy-dep/src/test/java/net/bytebuddy/dynamic/ClassFileLocatorForUrlTest.java

@@ -1,11 +1,11 @@
 package net.bytebuddy.dynamic;
 
 import net.bytebuddy.test.utility.JavaVersionRule;
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.MethodRule;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.Closeable;
 import java.io.File;
@@ -28,16 +28,14 @@ public class ClassFileLocatorForUrlTest {
     @Rule
     public MethodRule javaVersionRule = new JavaVersionRule();
 
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
     private File file;
 
     @Before
     public void setUp() throws Exception {
-        file = File.createTempFile(FOO, BAR);
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        assertThat(file.delete(), is(true));
+        file = temporaryFolder.newFile();
     }
 
     @Test