Use temporary folder for tests

Author: chris-allan

src/test/java/org/janelia/saalfeldlab/n5/AbstractN5Test.java

@@ -27,10 +27,11 @@
 import java.util.Random;
 
 import org.janelia.saalfeldlab.n5.N5Reader.Version;
-import org.junit.AfterClass;
 import org.junit.Assert;
-import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 /**
  * Abstract base class for testing N5 functionality.
@@ -41,6 +42,9 @@
  */
 public abstract class AbstractN5Test {
 
+	@Rule
+	public TemporaryFolder temp = new TemporaryFolder();
+
 	static protected final String groupName = "/test/group";
 	static protected final String[] subGroupNames = new String[]{"a", "b", "c"};
 	static protected final String datasetName = "/test/group/dataset";
@@ -54,9 +58,7 @@ public abstract class AbstractN5Test {
 	static protected float[] floatBlock;
 	static protected double[] doubleBlock;
 
-	static protected N5Writer n5;
-
-	protected abstract N5Writer createN5Writer() throws IOException;
+	protected N5Writer n5;
 
 	protected Compression[] getCompressions() {
 
@@ -73,13 +75,8 @@ protected Compression[] getCompressions() {
 	/**
 	 * @throws IOException
 	 */
-	@Before
-	public void setUpOnce() throws IOException {
-
-		if (n5 != null)
-			return;
-
-		n5 = createN5Writer();
+	@BeforeClass
+	public static void setUpOnce() throws IOException {
 
 		final Random rnd = new Random();
 		byteBlock = new byte[blockSize[0] * blockSize[1] * blockSize[2]];
@@ -98,18 +95,6 @@ public void setUpOnce() throws IOException {
 		}
 	}
 
-	/**
-	 * @throws IOException
-	 */
-	@AfterClass
-	public static void rampDownAfterClass() throws IOException {
-
-		if (n5 != null) {
-			Assert.assertTrue(n5.remove());
-			n5 = null;
-		}
-	}
-
 	@Test
 	public void testCreateGroup() {
 

src/test/java/org/janelia/saalfeldlab/n5/N5FSTest.java

@@ -18,6 +18,8 @@
 
 import java.io.IOException;
 
+import org.junit.Before;
+
 /**
  * Initiates testing of the filesystem-based N5 implementation.
  *
@@ -26,14 +28,9 @@
  */
 public class N5FSTest extends AbstractN5Test {
 
-	static private String testDirPath = System.getProperty("user.home") + "/tmp/n5-test";
-
-	/**
-	 * @throws IOException
-	 */
-	@Override
-	protected N5Writer createN5Writer() throws IOException {
-
-		return new N5FSWriter(testDirPath);
+	@Before
+	public void setUp() throws IOException {
+		n5 = new N5FSWriter(temp.newFolder("n5-test").getAbsolutePath());
 	}
+
 }