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package org.python.antlr;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import junit.framework.TestCase;
/**
* Decorates the PythonTreeWalker class as a JUnit test case for a single .py
* file
*/
public class PythonTreeWalkerTestCase extends TestCase {
private String _path;
/**
* Constructor called from rerun menu point in eclipse
*
* @param name The name of the test.
*/
public PythonTreeWalkerTestCase(String name) {
super(name);
setPath(name);
}
/**
* Create a test case which walks <code>pyFile</code>.
*
* @param pyFile The *.py file
*/
public PythonTreeWalkerTestCase(File pyFile) {
this(pyFile.getAbsolutePath());
}
@Override
protected void runTest() throws Throwable {
String path = getPath();
File file = new File(path);
assertTrue("file " + path + " not found", file.exists());
PythonTreeWalker treeWalker = new PythonTreeWalker();
treeWalker.setTolerant(false);
treeWalker.setParseOnly(false);
PythonTree tree = treeWalker.parse(new String[] { path });
if (tree == null) {
if (!isEmpty(file)) {
assertNotNull("no tree generated for file ".concat(path), tree);
}
}
}
@Override
public int countTestCases() {
return 1;
}
private void setPath(String path) {
_path = path;
}
private String getPath() {
return _path;
}
/**
* 'empty' check for a .py file
*
* @param file The file to check
* @return <code>true</code> if the file is really empty, or only contains
* comments
* @throws IOException
*/
private boolean isEmpty(File file) throws IOException {
boolean isEmpty = true;
assertTrue("file " + file.getAbsolutePath() + " is not readable", file.canRead());
BufferedReader reader = new BufferedReader(new FileReader(file));
try {
String line = reader.readLine();
while (line != null && isEmpty) {
line = line.trim();
if (line.length() > 0 && !line.startsWith("#")) {
isEmpty = false;
}
line = reader.readLine();
}
} finally {
reader.close();
}
return isEmpty;
}
}
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