/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
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 * implied. See the License for the specific language governing
 * rights and limitations under the License.
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 * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
 * Copyright (C) 2005 Kiel Hodges <jruby-devel@selfsosoft.com>
 * 
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package org.jruby.test;

import java.util.ArrayList;

import org.jruby.Ruby;
import org.jruby.RubyException;
import org.jruby.RubyFixnum;
import org.jruby.RubyObject;
import org.jruby.exceptions.RaiseException;
import org.jruby.runtime.builtin.IRubyObject;

/**
 * Unit test for the kernel class.
 **/
public class TestKernel extends TestRubyBase {

    public TestKernel(String name) {
        super(name);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        runtime = Ruby.newInstance();
        runtime.getLoadService().init(new ArrayList());
    }

    public void testLoad() throws Exception {
        //load should work several times in a row
        assertEquals("0", eval("load 'test/loadTest.rb'"));
        assertEquals("load did not load the same file several times", "1", eval("load 'test/loadTest.rb'"));
    }

    public void testRequire() throws Exception {
        //reset the $loadTestvar
        eval("$loadTest = nil");
        assertEquals("failed to load the file test/loadTest", "0", eval("require 'test/loadTest'"));
        assertEquals("incorrectly reloaded the file test/loadTest", "", eval("require 'test/loadTest'"));

        assertEquals("incorrect value for $\" variable", "test/loadTest.rb", eval("print $\"[-1]"));
    }

    public void testPrintf() throws Exception {
        assertEquals("hello", eval("printf(\"%s\", \"hello\")"));
        assertEquals("", eval("printf(\"%s\", nil)"));
    }

    public void testExit() throws Exception {
        verifyExit(RubyFixnum.zero(runtime),   "true");
        verifyExit(RubyFixnum.one(runtime),    "false");
        verifyExit(RubyFixnum.one(runtime),    "");
        verifyExit(new RubyFixnum(runtime, 7), "7");
    }
        
    private void verifyExit(RubyObject expectedStatus, String argument) throws Exception {
        try {
            eval("exit " + argument);
            fail("Expected a SystemExit to be thrown by calling exit.");
        } catch (RaiseException re) {
        	RubyException raisedException = re.getException();
        	if (runtime.getClass("SystemExit").isInstance(raisedException)) {
	            IRubyObject status = raisedException.callMethod(runtime.getCurrentContext(), "status");
	            assertEquals(expectedStatus, status);
        	} else {
        		throw re;
        	}
        }
    }
}
