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;

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 testHasUpperCase() {
        assertTrue("single upper-case string", StringUtils.hasUpperCase("String"));
        assertTrue("multi upper-case string", StringUtils.hasUpperCase("stRInG"));
        assertTrue("all upper-case string", StringUtils.hasUpperCase("STRING"));
        assertTrue("upper-case string with non-letters", StringUtils.hasUpperCase("He's"));

        assertFalse("empty string", StringUtils.hasUpperCase(""));
        assertFalse("lower-case string", StringUtils.hasUpperCase("string"));
        assertFalse("lower-case string with non-letters", StringUtils.hasUpperCase("he's"));
    }
}