///////////////////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code and other text files for adherence to a set of rules.
// Copyright (C) 2001-2023 the original author or authors.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
///////////////////////////////////////////////////////////////////////////////////////////////

package com.puppycrawl.tools.checkstyle;

import static com.google.common.truth.Truth.assertWithMessage;

import java.util.Properties;

import org.junit.jupiter.api.Test;

public class PropertiesExpanderTest {

    @Test
    public void testCtorException() {
        try {
            final Object test = new PropertiesExpander(null);
            assertWithMessage("exception expected but got " + test).fail();
        }
        catch (IllegalArgumentException ex) {
            assertWithMessage("Invalid exception message")
                    .that(ex.getMessage())
                    .isEqualTo("cannot pass null");
        }
    }

    @Test
    public void testDefaultProperties() {
        final Properties properties = new Properties(System.getProperties());
        properties.setProperty("test", "checkstyle");
        final String propertiesUserHome = properties.getProperty("user.home");
        assertWithMessage("Invalid user.home property")
                .that(propertiesUserHome)
                .isEqualTo(System.getProperty("user.home"));
        assertWithMessage("Invalid checkstyle property")
                .that(properties.getProperty("test"))
                .isEqualTo("checkstyle");

        final PropertiesExpander expander = new PropertiesExpander(properties);
        final String expanderUserHome = expander.resolve("user.home");
        assertWithMessage("Invalid user.home property")
                .that(expanderUserHome)
                .isEqualTo(System.getProperty("user.home"));
        assertWithMessage("Invalid checkstyle property")
                .that(expander.resolve("test"))
                .isEqualTo("checkstyle");
    }

}
