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Java example source code file (StringUtilsStartsEndsWithTest.java)

This example Java source code file (StringUtilsStartsEndsWithTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

abcdef, abcxyz, bar, charsequence, foo, foobar, strbuilder, string, stringbuffer, stringbuilder, stringutilsstartsendswithtest, test, xyz

The StringUtilsStartsEndsWithTest.java Java example source code

/*
 * 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.commons.lang3;

import org.junit.Test;
import static org.junit.Assert.*;
import org.apache.commons.lang3.text.StrBuilder;

/**
 * Unit tests {@link org.apache.commons.lang3.StringUtils} - StartsWith/EndsWith methods
 */
public class StringUtilsStartsEndsWithTest {
    private static final String foo    = "foo";
    private static final String bar    = "bar";
    private static final String foobar = "foobar";
    private static final String FOO    = "FOO";
    private static final String BAR    = "BAR";
    private static final String FOOBAR = "FOOBAR";

    //-----------------------------------------------------------------------

    /**
     * Test StringUtils.startsWith()
     */
    @Test
    public void testStartsWith() {
        assertTrue("startsWith(null, null)", StringUtils.startsWith(null, (String)null));
        assertFalse("startsWith(FOOBAR, null)", StringUtils.startsWith(FOOBAR, (String)null));
        assertFalse("startsWith(null, FOO)",    StringUtils.startsWith(null, FOO));
        assertTrue("startsWith(FOOBAR, \"\")",  StringUtils.startsWith(FOOBAR, ""));

        assertTrue("startsWith(foobar, foo)",  StringUtils.startsWith(foobar, foo));
        assertTrue("startsWith(FOOBAR, FOO)",  StringUtils.startsWith(FOOBAR, FOO));
        assertFalse("startsWith(foobar, FOO)", StringUtils.startsWith(foobar, FOO));
        assertFalse("startsWith(FOOBAR, foo)", StringUtils.startsWith(FOOBAR, foo));

        assertFalse("startsWith(foo, foobar)", StringUtils.startsWith(foo, foobar));
        assertFalse("startsWith(foo, foobar)", StringUtils.startsWith(bar, foobar));

        assertFalse("startsWith(foobar, bar)", StringUtils.startsWith(foobar, bar));
        assertFalse("startsWith(FOOBAR, BAR)", StringUtils.startsWith(FOOBAR, BAR));
        assertFalse("startsWith(foobar, BAR)", StringUtils.startsWith(foobar, BAR));
        assertFalse("startsWith(FOOBAR, bar)", StringUtils.startsWith(FOOBAR, bar));
    }

    /**
     * Test StringUtils.testStartsWithIgnoreCase()
     */
    @Test
    public void testStartsWithIgnoreCase() {
        assertTrue("startsWithIgnoreCase(null, null)",    StringUtils.startsWithIgnoreCase(null, (String)null));
        assertFalse("startsWithIgnoreCase(FOOBAR, null)", StringUtils.startsWithIgnoreCase(FOOBAR, (String)null));
        assertFalse("startsWithIgnoreCase(null, FOO)",    StringUtils.startsWithIgnoreCase(null, FOO));
        assertTrue("startsWithIgnoreCase(FOOBAR, \"\")",  StringUtils.startsWithIgnoreCase(FOOBAR, ""));

        assertTrue("startsWithIgnoreCase(foobar, foo)", StringUtils.startsWithIgnoreCase(foobar, foo));
        assertTrue("startsWithIgnoreCase(FOOBAR, FOO)", StringUtils.startsWithIgnoreCase(FOOBAR, FOO));
        assertTrue("startsWithIgnoreCase(foobar, FOO)", StringUtils.startsWithIgnoreCase(foobar, FOO));
        assertTrue("startsWithIgnoreCase(FOOBAR, foo)", StringUtils.startsWithIgnoreCase(FOOBAR, foo));

        assertFalse("startsWithIgnoreCase(foo, foobar)", StringUtils.startsWithIgnoreCase(foo, foobar));
        assertFalse("startsWithIgnoreCase(foo, foobar)", StringUtils.startsWithIgnoreCase(bar, foobar));

        assertFalse("startsWithIgnoreCase(foobar, bar)", StringUtils.startsWithIgnoreCase(foobar, bar));
        assertFalse("startsWithIgnoreCase(FOOBAR, BAR)", StringUtils.startsWithIgnoreCase(FOOBAR, BAR));
        assertFalse("startsWithIgnoreCase(foobar, BAR)", StringUtils.startsWithIgnoreCase(foobar, BAR));
        assertFalse("startsWithIgnoreCase(FOOBAR, bar)", StringUtils.startsWithIgnoreCase(FOOBAR, bar));
    }

    @Test
    public void testStartsWithAny() {
        assertFalse(StringUtils.startsWithAny(null, (String[])null));
        assertFalse(StringUtils.startsWithAny(null, "abc"));
        assertFalse(StringUtils.startsWithAny("abcxyz", (String[])null));
        assertFalse(StringUtils.startsWithAny("abcxyz"));
        assertTrue(StringUtils.startsWithAny("abcxyz", "abc"));
        assertTrue(StringUtils.startsWithAny("abcxyz", null, "xyz", "abc"));
        assertFalse(StringUtils.startsWithAny("abcxyz", null, "xyz", "abcd"));
        assertTrue(StringUtils.startsWithAny("abcxyz", new String[]{""}));
        assertFalse(StringUtils.startsWithAny("abcxyz", null, "xyz", "ABCX"));
        assertFalse(StringUtils.startsWithAny("ABCXYZ", null, "xyz", "abc"));

        assertTrue("StringUtils.startsWithAny(abcxyz, StringBuilder(xyz), StringBuffer(abc))", StringUtils.startsWithAny("abcxyz", new StringBuilder("xyz"), new StringBuffer("abc")));
        assertTrue("StringUtils.startsWithAny( StrBuilder(abcxyz), StringBuilder(xyz), StringBuffer(abc))", StringUtils.startsWithAny( new StrBuilder("abcxyz"), new StringBuilder("xyz"), new StringBuffer("abc")));
    }
 

    /**
     * Test StringUtils.endsWith()
     */
    @Test
    public void testEndsWith() {
        assertTrue("endsWith(null, null)",    StringUtils.endsWith(null, (String)null));
        assertFalse("endsWith(FOOBAR, null)", StringUtils.endsWith(FOOBAR, (String)null));
        assertFalse("endsWith(null, FOO)",    StringUtils.endsWith(null, FOO));
        assertTrue("endsWith(FOOBAR, \"\")",  StringUtils.endsWith(FOOBAR, ""));

        assertFalse("endsWith(foobar, foo)", StringUtils.endsWith(foobar, foo));
        assertFalse("endsWith(FOOBAR, FOO)", StringUtils.endsWith(FOOBAR, FOO));
        assertFalse("endsWith(foobar, FOO)", StringUtils.endsWith(foobar, FOO));
        assertFalse("endsWith(FOOBAR, foo)", StringUtils.endsWith(FOOBAR, foo));

        assertFalse("endsWith(foo, foobar)", StringUtils.endsWith(foo, foobar));
        assertFalse("endsWith(foo, foobar)", StringUtils.endsWith(bar, foobar));

        assertTrue("endsWith(foobar, bar)",  StringUtils.endsWith(foobar, bar));
        assertTrue("endsWith(FOOBAR, BAR)",  StringUtils.endsWith(FOOBAR, BAR));
        assertFalse("endsWith(foobar, BAR)", StringUtils.endsWith(foobar, BAR));
        assertFalse("endsWith(FOOBAR, bar)", StringUtils.endsWith(FOOBAR, bar));

        // "alpha,beta,gamma,delta".endsWith("delta")
        assertTrue("endsWith(\u03B1\u03B2\u03B3\u03B4, \u03B4)",
                StringUtils.endsWith("\u03B1\u03B2\u03B3\u03B4", "\u03B4"));
        // "alpha,beta,gamma,delta".endsWith("gamma,DELTA")
        assertFalse("endsWith(\u03B1\u03B2\u03B3\u03B4, \u03B3\u0394)",
                StringUtils.endsWith("\u03B1\u03B2\u03B3\u03B4", "\u03B3\u0394"));
    }

    /**
     * Test StringUtils.endsWithIgnoreCase()
     */
    @Test
    public void testEndsWithIgnoreCase() {
        assertTrue("endsWithIgnoreCase(null, null)",    StringUtils.endsWithIgnoreCase(null, (String)null));
        assertFalse("endsWithIgnoreCase(FOOBAR, null)", StringUtils.endsWithIgnoreCase(FOOBAR, (String)null));
        assertFalse("endsWithIgnoreCase(null, FOO)",    StringUtils.endsWithIgnoreCase(null, FOO));
        assertTrue("endsWithIgnoreCase(FOOBAR, \"\")",  StringUtils.endsWithIgnoreCase(FOOBAR, ""));

        assertFalse("endsWithIgnoreCase(foobar, foo)", StringUtils.endsWithIgnoreCase(foobar, foo));
        assertFalse("endsWithIgnoreCase(FOOBAR, FOO)", StringUtils.endsWithIgnoreCase(FOOBAR, FOO));
        assertFalse("endsWithIgnoreCase(foobar, FOO)", StringUtils.endsWithIgnoreCase(foobar, FOO));
        assertFalse("endsWithIgnoreCase(FOOBAR, foo)", StringUtils.endsWithIgnoreCase(FOOBAR, foo));

        assertFalse("endsWithIgnoreCase(foo, foobar)", StringUtils.endsWithIgnoreCase(foo, foobar));
        assertFalse("endsWithIgnoreCase(foo, foobar)", StringUtils.endsWithIgnoreCase(bar, foobar));

        assertTrue("endsWithIgnoreCase(foobar, bar)", StringUtils.endsWithIgnoreCase(foobar, bar));
        assertTrue("endsWithIgnoreCase(FOOBAR, BAR)", StringUtils.endsWithIgnoreCase(FOOBAR, BAR));
        assertTrue("endsWithIgnoreCase(foobar, BAR)", StringUtils.endsWithIgnoreCase(foobar, BAR));
        assertTrue("endsWithIgnoreCase(FOOBAR, bar)", StringUtils.endsWithIgnoreCase(FOOBAR, bar));

        // javadoc
        assertTrue(StringUtils.endsWithIgnoreCase("abcdef", "def"));
        assertTrue(StringUtils.endsWithIgnoreCase("ABCDEF", "def"));
        assertFalse(StringUtils.endsWithIgnoreCase("ABCDEF", "cde"));

        // "alpha,beta,gamma,delta".endsWith("DELTA")
        assertTrue("endsWith(\u03B1\u03B2\u03B3\u03B4, \u0394)",
                StringUtils.endsWithIgnoreCase("\u03B1\u03B2\u03B3\u03B4", "\u0394"));
        // "alpha,beta,gamma,delta".endsWith("GAMMA")
        assertFalse("endsWith(\u03B1\u03B2\u03B3\u03B4, \u0393)",
                StringUtils.endsWithIgnoreCase("\u03B1\u03B2\u03B3\u03B4", "\u0393"));
    }

    @Test
    public void testEndsWithAny() {
        assertFalse("StringUtils.endsWithAny(null, null)", StringUtils.endsWithAny(null, (String)null));
        assertFalse("StringUtils.endsWithAny(null, new String[] {abc})", StringUtils.endsWithAny(null, new String[] {"abc"}));
        assertFalse("StringUtils.endsWithAny(abcxyz, null)", StringUtils.endsWithAny("abcxyz", (String)null));
        assertTrue("StringUtils.endsWithAny(abcxyz, new String[] {\"\"})", StringUtils.endsWithAny("abcxyz", new String[] {""}));
        assertTrue("StringUtils.endsWithAny(abcxyz, new String[] {xyz})", StringUtils.endsWithAny("abcxyz", new String[] {"xyz"}));
        assertTrue("StringUtils.endsWithAny(abcxyz, new String[] {null, xyz, abc})", StringUtils.endsWithAny("abcxyz", new String[] {null, "xyz", "abc"}));
        assertFalse("StringUtils.endsWithAny(defg, new String[] {null, xyz, abc})", StringUtils.endsWithAny("defg", new String[] {null, "xyz", "abc"}));
        assertTrue(StringUtils.endsWithAny("abcXYZ", "def", "XYZ"));
        assertFalse(StringUtils.endsWithAny("abcXYZ", "def", "xyz"));
        assertTrue(StringUtils.endsWithAny("abcXYZ", "def", "YZ"));

        /*
         * Type null of the last argument to method endsWithAny(CharSequence, CharSequence...)
         * doesn't exactly match the vararg parameter type. 
         * Cast to CharSequence[] to confirm the non-varargs invocation,
         * or pass individual arguments of type CharSequence for a varargs invocation.
         *
         * assertFalse(StringUtils.endsWithAny("abcXYZ", null)); // replace with specific types to avoid warning
         */
        assertFalse(StringUtils.endsWithAny("abcXYZ", (CharSequence) null));
        assertFalse(StringUtils.endsWithAny("abcXYZ", (CharSequence[]) null));
        assertTrue(StringUtils.endsWithAny("abcXYZ", ""));

        assertTrue("StringUtils.endsWithAny(abcxyz, StringBuilder(abc), StringBuffer(xyz))", StringUtils.endsWithAny("abcxyz", new StringBuilder("abc"), new StringBuffer("xyz")));
        assertTrue("StringUtils.endsWithAny( StrBuilder(abcxyz), StringBuilder(abc), StringBuffer(xyz))", StringUtils.endsWithAny( new StrBuilder("abcxyz"), new StringBuilder("abc"), new StringBuffer("xyz")));
    }


}

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