/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.tools.ant.taskdefs.optional;

import java.io.File;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.BuildFileRule;
import org.apache.tools.ant.taskdefs.optional.jsp.Jasper41Mangler;
import org.apache.tools.ant.taskdefs.optional.jsp.JspMangler;
import org.apache.tools.ant.taskdefs.optional.jsp.JspNameMangler;
import org.apache.tools.ant.taskdefs.optional.jsp.compilers.JspCompilerAdapter;
import org.apache.tools.ant.taskdefs.optional.jsp.compilers.JspCompilerAdapterFactory;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import static org.hamcrest.Matchers.instanceOf;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;

/**
 * Tests the Jspc task.
 * <p>
 * created 07 March 2002
 * </p>
 * @since Ant 1.5
 */
public class JspcTest {

    @Rule
    public ExpectedException thrown = ExpectedException.none();

    @Rule
    public BuildFileRule buildRule = new BuildFileRule();

    @Before
    public void setUp() {
        buildRule.configureProject("src/etc/testcases/taskdefs/optional/jspc.xml");
     }

    @Test
    public void testSimple() {
        executeJspCompile("testSimple", "simple_jsp.java");
    }

    @Test
    public void testUriroot() {
        executeJspCompile("testUriroot", "uriroot_jsp.java");
    }

    @Test
    public void testXml() {
        executeJspCompile("testXml", "xml_jsp.java");
    }

    /**
     * try a keyword in a file
     */
    @Test
    public void testKeyword() {
        executeJspCompile("testKeyword", "default_jsp.java");
    }

    /**
     * what happens to 1nvalid-classname
     */
    @Test
    public void testInvalidClassname() {
        executeJspCompile("testInvalidClassname",
                "_1nvalid_0002dclassname_jsp.java");
    }

    @Test
    public void testNoTld() {
        thrown.expect(BuildException.class);
        thrown.expectMessage("Java returned: 9");
        buildRule.executeTarget("testNoTld");
    }

    @Test
    public void testNotAJspFile() {
        buildRule.executeTarget("testNotAJspFile");
    }

    /**
     * webapp test is currently broken, because it picks up
     * on the missing_tld file, and bails.
     */
    @Ignore("picks up on the missing_tld file, and incorrectly bails")
    @Test
    public void testWebapp() {
        buildRule.executeTarget("testWebapp");
    }

    /**
     * run a target then verify the named file gets created
     *
     * @param target Description of Parameter
     * @param javafile Description of Parameter
     */
    protected void executeJspCompile(String target, String javafile) {
        buildRule.executeTarget(target);
        assertJavaFileCreated(javafile);
    }

    /**
     * verify that a named file was created
     *
     * @param filename Description of Parameter
     */
    protected void assertJavaFileCreated(String filename) {
        File file = getOutputFile(filename);
        assertTrue("file " + filename + " not found", file.exists());
        assertNotEquals("file " + filename + " is empty", 0, file.length());
    }

    /**
     * Gets the OutputFile attribute of the JspcTest object
     *
     * @param subpath Description of Parameter
     * @return The OutputFile value
     */
    protected File getOutputFile(String subpath) {
        return new File(buildRule.getProject().getProperty("output"), subpath);
    }

    /**
     * verify that we select the appropriate mangler
     */
    @Test
    public void testJasperNameManglerSelection() {
        JspCompilerAdapter adapter =
                JspCompilerAdapterFactory.getCompiler("jasper", null, null);
        JspMangler mangler = adapter.createMangler();
        assertThat(mangler, instanceOf(JspNameMangler.class));
        adapter = JspCompilerAdapterFactory.getCompiler("jasper41", null, null);
        mangler = adapter.createMangler();
        assertThat(mangler, instanceOf(Jasper41Mangler.class));
    }

    @Test
    public void testJasper41() {
        JspMangler mangler = new Jasper41Mangler();
        //java keywords are not special
        assertMapped(mangler, "for.jsp", "for_jsp");
        //underscores go in front of invalid start chars
        assertMapped(mangler, "0.jsp", "_0_jsp");
        //underscores at the front get an underscore too
        assertMapped(mangler, "_.jsp", "___jsp");
        //non java char at start => underscore then the the _hex value
        assertMapped(mangler, "-.jsp", "__0002d_jsp");
        //and paths are stripped
        char s = File.separatorChar;
        assertMapped(mangler, "" + s + s + "somewhere" + s + "file" + s + "index.jsp", "index_jsp");
    }

    /**
     * assert our mapping rules
     * @param mangler JspMangler
     * @param filename String
     * @param classname String
     */
    protected void assertMapped(JspMangler mangler, String filename, String classname) {
        String mappedname = mangler.mapJspToJavaName(new File(filename));
        assertEquals(filename + " should have mapped to " + classname
                + " but instead mapped to " + mappedname, classname, mappedname);
    }

}
