src/test/java/org/apache/commons/codec/AbstractStringEncoderTest.java

/*
 * 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
 *
 *      https://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.commons.codec;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.fail;

import java.util.Locale;

import org.junit.jupiter.api.Test;

/**
 */
public abstract class AbstractStringEncoderTest<T extends StringEncoder> {

    protected T stringEncoder = createStringEncoder();

    public void checkEncoding(final String expected, final String source) throws EncoderException {
        assertEquals(expected, getStringEncoder().encode(source), "Source: " + source);
    }

    protected void checkEncodings(final String[][] data) throws EncoderException {
        for (final String[] element : data) {
            checkEncoding(element[1], element[0]);
        }
    }

    protected void checkEncodingVariations(final String expected, final String... data) throws EncoderException {
        for (final String element : data) {
            checkEncoding(expected, element);
        }
    }

    protected abstract T createStringEncoder();

    public T getStringEncoder() {
        return stringEncoder;
    }

    @Test
    void testEncodeEmpty() throws Exception {
        final Encoder encoder = getStringEncoder();
        encoder.encode("");
        encoder.encode(" ");
        encoder.encode("\t");
    }

    @Test
    void testEncodeNull() throws EncoderException {
        final StringEncoder encoder = getStringEncoder();
        encoder.encode(null);
    }

    @Test
    void testEncodeWithInvalidObject() throws Exception {
        final StringEncoder encoder = getStringEncoder();
        assertThrows(EncoderException.class, () -> encoder.encode(Float.valueOf(3.4f)), "An exception was not thrown when we tried to encode a Float object");
    }

    @Test
    void testLocaleIndependence() throws Exception {
        final StringEncoder encoder = getStringEncoder();
        final String[] data = { "I", "i" };
        final Locale orig = Locale.getDefault();
        final Locale[] locales = { Locale.ENGLISH, new Locale("tr"), Locale.getDefault() };
        try {
            for (final String element : data) {
                String ref = null;
                for (int j = 0; j < locales.length; j++) {
                    Locale.setDefault(locales[j]);
                    if (j <= 0) {
                        ref = encoder.encode(element);
                    } else {
                        String cur = null;
                        try {
                            cur = encoder.encode(element);
                        } catch (final Exception e) {
                            fail(Locale.getDefault().toString() + ": " + e.getMessage());
                        }
                        assertEquals(ref, cur, Locale.getDefault().toString() + ": ");
                    }
                }
            }
        } finally {
            Locale.setDefault(orig);
        }
    }
}