LatinIME/tests/src/com/android/inputmethod/latin/StringUtilsTests.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed 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 com.android.inputmethod.latin;

import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;

import java.util.Locale;

@SmallTest
public class StringUtilsTests extends AndroidTestCase {
    public void testContainsInArray() {
        assertFalse("empty array", StringUtils.containsInArray("key", new String[0]));
        assertFalse("not in 1 element", StringUtils.containsInArray("key", new String[] {
                "key1"
        }));
        assertFalse("not in 2 elements", StringUtils.containsInArray("key", new String[] {
                "key1", "key2"
        }));

        assertTrue("in 1 element", StringUtils.containsInArray("key", new String[] {
                "key"
        }));
        assertTrue("in 2 elements", StringUtils.containsInArray("key", new String[] {
                "key1", "key"
        }));
    }

    public void testContainsInCsv() {
        assertFalse("null", StringUtils.containsInCsv("key", null));
        assertFalse("empty", StringUtils.containsInCsv("key", ""));
        assertFalse("not in 1 element", StringUtils.containsInCsv("key", "key1"));
        assertFalse("not in 2 elements", StringUtils.containsInCsv("key", "key1,key2"));

        assertTrue("in 1 element", StringUtils.containsInCsv("key", "key"));
        assertTrue("in 2 elements", StringUtils.containsInCsv("key", "key1,key"));
    }

    public void testAppendToCsvIfNotExists() {
        assertEquals("null", "key", StringUtils.appendToCsvIfNotExists("key", null));
        assertEquals("empty", "key", StringUtils.appendToCsvIfNotExists("key", ""));

        assertEquals("not in 1 element", "key1,key",
                StringUtils.appendToCsvIfNotExists("key", "key1"));
        assertEquals("not in 2 elements", "key1,key2,key",
                StringUtils.appendToCsvIfNotExists("key", "key1,key2"));

        assertEquals("in 1 element", "key",
                StringUtils.appendToCsvIfNotExists("key", "key"));
        assertEquals("in 2 elements at position 1", "key,key2",
                StringUtils.appendToCsvIfNotExists("key", "key,key2"));
        assertEquals("in 2 elements at position 2", "key1,key",
                StringUtils.appendToCsvIfNotExists("key", "key1,key"));
        assertEquals("in 3 elements at position 2", "key1,key,key3",
                StringUtils.appendToCsvIfNotExists("key", "key1,key,key3"));
    }

    public void testRemoveFromCsvIfExists() {
        assertEquals("null", "", StringUtils.removeFromCsvIfExists("key", null));
        assertEquals("empty", "", StringUtils.removeFromCsvIfExists("key", ""));

        assertEquals("not in 1 element", "key1",
                StringUtils.removeFromCsvIfExists("key", "key1"));
        assertEquals("not in 2 elements", "key1,key2",
                StringUtils.removeFromCsvIfExists("key", "key1,key2"));

        assertEquals("in 1 element", "",
                StringUtils.removeFromCsvIfExists("key", "key"));
        assertEquals("in 2 elements at position 1", "key2",
                StringUtils.removeFromCsvIfExists("key", "key,key2"));
        assertEquals("in 2 elements at position 2", "key1",
                StringUtils.removeFromCsvIfExists("key", "key1,key"));
        assertEquals("in 3 elements at position 2", "key1,key3",
                StringUtils.removeFromCsvIfExists("key", "key1,key,key3"));

        assertEquals("in 3 elements at position 1,2,3", "",
                StringUtils.removeFromCsvIfExists("key", "key,key,key"));
        assertEquals("in 5 elements at position 2,4", "key1,key3,key5",
                StringUtils.removeFromCsvIfExists("key", "key1,key,key3,key,key5"));
    }

    public void testToTitleCase() {
        assertEquals("SSaa",
                StringUtils.toTitleCase("ßaa", Locale.GERMAN));
        assertEquals("Aßa",
                StringUtils.toTitleCase("aßa", Locale.GERMAN));
        assertEquals("Iab",
                StringUtils.toTitleCase("iab", Locale.ENGLISH));
        assertEquals("Camelcase",
                StringUtils.toTitleCase("cAmElCaSe", Locale.ENGLISH));
        assertEquals("İab",
                StringUtils.toTitleCase("iab", new Locale("tr")));
        assertEquals("Aib",
                StringUtils.toTitleCase("AİB", new Locale("tr")));
        // For one character, toTitleCase returns the string as is. Not sure what the motivation
        // is, but that's how it works now.
        assertEquals("a",
                StringUtils.toTitleCase("a", Locale.ENGLISH));
        assertEquals("A",
                StringUtils.toTitleCase("A", Locale.ENGLISH));
    }

    public void testGetCapitalizationType() {
        assertEquals(StringUtils.CAPITALIZE_NONE,
                StringUtils.getCapitalizationType("capitalize"));
        assertEquals(StringUtils.CAPITALIZE_NONE,
                StringUtils.getCapitalizationType("cApITalize"));
        assertEquals(StringUtils.CAPITALIZE_NONE,
                StringUtils.getCapitalizationType("capitalizE"));
        assertEquals(StringUtils.CAPITALIZE_NONE,
                StringUtils.getCapitalizationType("__c a piu$@tali56ze"));
        assertEquals(StringUtils.CAPITALIZE_FIRST,
                StringUtils.getCapitalizationType("A__c a piu$@tali56ze"));
        assertEquals(StringUtils.CAPITALIZE_FIRST,
                StringUtils.getCapitalizationType("Capitalize"));
        assertEquals(StringUtils.CAPITALIZE_FIRST,
                StringUtils.getCapitalizationType("     Capitalize"));
        assertEquals(StringUtils.CAPITALIZE_ALL,
                StringUtils.getCapitalizationType("CAPITALIZE"));
        assertEquals(StringUtils.CAPITALIZE_ALL,
                StringUtils.getCapitalizationType("  PI26LIE"));
        assertEquals(StringUtils.CAPITALIZE_NONE,
                StringUtils.getCapitalizationType(""));
    }
}