package org.codehaus.groovy.ast;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;

import junit.framework.TestSuite;

/**
 * Tests the LineColumn information in file specified in TEST_FILE_PATH
 * 
 * The file in the specified path should look like:
 * 
 * ###<testname>:::
 * <source code from which the AST will be built>
 * :::<expected AST output>
 * 
 * The section above can be repeated for every new TestCase
 * 
 * The AST output from the visitor is quite big. Also for small source code snippets. Therefore
 * it is possible to only specify the nodes that you wan't to check and separate them with a semicolon.
 * A semicolon is also needed when you begin with a new line.
 * Bsp: 
 * [TryCatchStatement,(1:1),(9:2)][BlockStatement,(1:5),(3:3)];
 * [CatchStatement,(3:3),(5:3)][BlockStatement,(3:12),(5:3)];
 * [CatchStatement,(5:3),(7:3)][BlockStatement,(5:12),(7:3)];
 * [BlockStatement,(7:3),(9:2)][BlockStatement,(7:11),(9:2)]
 * 
 * [<NodeType>,(<line>:<column>),(<lastLine>:<lastColumn>)]
 * 
 * @author <a href="mailto:martin.kempf@gmail.com">Martin Kempf</a>
 *
 */
public class LineColumnCheckTestSuite extends TestSuite {

    public static final String TEST_FILE_PATH = "./src/test/org/codehaus/groovy/ast/LineColumnCheck.txt";

    public static TestSuite suite() {
        TestSuite ts = new TestSuite("LineColumnCheckTestSuite");
        String content;
        try {
            content = getContent(new FileReader(TEST_FILE_PATH));
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
        String[] tests = content.split("###");
        String testName = "";
        String source = "";
        String expected;
        for (String test : tests) {
            String[] slicedTests = test.split(":::");
            for (int ii = 0; ii < slicedTests.length; ii++) {
                if (ii % 3 == 0) {
                    testName = slicedTests[ii];
                } else if (ii % 3 == 1) {
                    source = slicedTests[ii].trim();
                } else if (ii % 3 == 2) {
                    expected = slicedTests[ii].trim();
                    ts.addTest(new LineColumnChecker(testName, source, expected));
                }
            }
        }
        return ts;
    }

    private static String getContent(Reader reader) {
        int character;
        StringBuffer content = new StringBuffer();
        try {
            while ((character = reader.read()) != -1) {
                content.append((char) character);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return content.toString();
    }

}