Author: sebb
Date: Fri Sep 11 17:38:33 2015
New Revision: 1702521
URL: http://svn.apache.org/r1702521
Log:
Add a round-trip BCELifier test case
Modified:
commons/proper/bcel/trunk/src/test/java/org/apache/commons/bcel6/util/BCELifierTestCase.java
Modified:
commons/proper/bcel/trunk/src/test/java/org/apache/commons/bcel6/util/BCELifierTestCase.java
URL:
http://svn.apache.org/viewvc/commons/proper/bcel/trunk/src/test/java/org/apache/commons/bcel6/util/BCELifierTestCase.java?rev=1702521&r1=1702520&r2=1702521&view=diff
==============================================================================
---
commons/proper/bcel/trunk/src/test/java/org/apache/commons/bcel6/util/BCELifierTestCase.java
(original)
+++
commons/proper/bcel/trunk/src/test/java/org/apache/commons/bcel6/util/BCELifierTestCase.java
Fri Sep 11 17:38:33 2015
@@ -2,12 +2,16 @@ package org.apache.commons.bcel6.util;
import static org.junit.Assert.*;
+import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
import java.io.OutputStream;
-
import org.apache.commons.bcel6.classfile.JavaClass;
import org.junit.Test;
+
public class BCELifierTestCase {
@Test
@@ -19,4 +23,55 @@ public class BCELifierTestCase {
bcelifier.start();
}
+ /*
+ * Dump a class using "javap" and compare with the same class recreated
+ * using BCELifier, "javac", "java" and dumped with "javap"
+ * TODO: detect if JDK present and skip test if not
+ */
+ @Test
+ public void testJavapCompare() throws Exception {
+ testClassOnPath("target/test-classes/Java8Example.class");
+ }
+
+ private void testClassOnPath(String javaClass) throws Exception {
+ // Get javap of the input class
+ final String initial = exec(null, "javap", "-p", javaClass);
+
+ final File workDir = new File("target");
+ File infile = new File(javaClass);
+ JavaClass java_class =
BCELifier.getJavaClass(infile.getName().replace(".class", ""));
+ assertNotNull(java_class);
+ File outfile = new File(workDir,infile.getName().replace(".class",
"Creator.java"));
+ FileOutputStream fos = new FileOutputStream(outfile);
+ BCELifier bcelifier = new BCELifier(java_class, fos);
+ bcelifier.start();
+ fos.close();
+ exec(workDir, "javac", "-cp", "classes", outfile.getName());
+ exec(workDir, "java", "-cp", ".:classes",
outfile.getName().replace(".java", ""));
+ final String output = exec(workDir, "javap", "-p", infile.getName());
+ assertEquals(initial, output);
+ }
+
+ private String exec(File workDir, String ... args) throws Exception {
+// System.err.println(java.util.Arrays.toString(args));
+ ProcessBuilder pb = new ProcessBuilder( args );
+ pb.directory(workDir);
+ Process proc = pb.start();
+ BufferedInputStream is = new
BufferedInputStream(proc.getInputStream());
+ InputStream es = proc.getErrorStream();
+ proc.waitFor();
+ byte []buff=new byte[2048];
+ int len;
+ while((len=es.read(buff)) != -1) {
+ System.err.print(new String(buff,0,len));
+ }
+
+ StringBuilder sb = new StringBuilder();
+ while((len=is.read(buff)) != -1) {
+ sb.append(new String(buff,0,len));
+ }
+ is.close();
+ return sb.toString();
+ }
+
}
