package com.puppycrawl.tools.checkstyle.api;

import static org.junit.Assert.*;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.commons.beanutils.ConversionException;
import org.junit.Test;

public class TestUtils {
	@Test
	public void test() throws IOException{
		assertNotNull(Utils.getExceptionLogger());
		
		//whitespaceBefore()
		String testString1 = "   hello  ";
		assertTrue(Utils.whitespaceBefore(0, testString1));
		assertTrue(Utils.whitespaceBefore(2, testString1));
		assertTrue(Utils.whitespaceBefore(3, testString1));
		assertFalse(Utils.whitespaceBefore(4, testString1));
		assertFalse(Utils.whitespaceBefore(8, testString1));
		assertFalse(Utils.whitespaceBefore(9, testString1));

		String testString2 = "h  ello  ";
		assertTrue(Utils.whitespaceBefore(0, testString2));
		assertFalse(Utils.whitespaceBefore(1, testString2));
		
		//lengthMinusTrailingWhitespace()
		assertEquals(8, Utils.lengthMinusTrailingWhitespace(testString1));
		assertEquals(7, Utils.lengthMinusTrailingWhitespace(testString2));

		String testString3 = "hello  b\t\t\n\r\r\n";
		assertEquals(8, Utils.lengthMinusTrailingWhitespace(testString3));
		
		//lengthExpandedTabs()
		String testString4 = "hello\ttest";
		assertEquals(8, Utils.lengthExpandedTabs(testString4, 6, 4));
		assertEquals(12, Utils.lengthExpandedTabs(testString4, 10, 4));

		String testString5 = "hell\ttest";
		assertEquals(12, Utils.lengthExpandedTabs(testString5, 9, 4));
		
		String testString6 = "";
		assertEquals(0, Utils.lengthExpandedTabs(testString6, 0, 4));

		String testString7 = "\t";
		assertEquals(4, Utils.lengthExpandedTabs(testString7, 1, 4));
		
		
		//getPattern()
		assertNotNull(Utils.getPattern(""));
		assertTrue(Utils.getPattern("a.*bc.+test").matcher("axyzdebcytest").matches());
		assertNotNull(Utils.getPattern("a.*bc.+test.*", 0));
		assertNotNull(Utils.getPattern("a.*bc.+test.*", 5));
		
		//getLines()
		assertEquals(6, Utils.getLines("./test.txt").length);

		try{
			Utils.getLines("./test.txt", "somefunkynon-existingencoding");
			fail();
		}catch(UnsupportedEncodingException ex){}
		
		
		//createPattern()
		assertNotNull(Utils.createPattern("abc.*"));
		
		try{
			Utils.createPattern("invalidPattern.(");
			fail();
		}catch(ConversionException ce){}
		
		
		//baseClassname()
		assertEquals(Utils.baseClassname("org.fruit.alayer.Finder"), "Finder");
		assertEquals(Utils.baseClassname("Finder"), "Finder");
		assertEquals(Utils.baseClassname("F"), "F");
		assertEquals(Utils.baseClassname(""), "");
		
		//getStrippedFileName
		assertEquals("/usr/bin/sh", Utils.getStrippedFileName(null, "/usr/bin/sh"));
		assertEquals("/usr/bin/sh", Utils.getStrippedFileName("differentPrefix", "/usr/bin/sh"));
		assertEquals("sh", Utils.getStrippedFileName("/usr/bin/", "/usr/bin/sh"));
		assertEquals("sh", Utils.getStrippedFileName("/usr/bin", "/usr/bin/sh"));
		assertFalse("sh".equals(Utils.getStrippedFileName("/uxr/bin/", "/usr/bin/sh"))) ;
		
		
		//closeQuietly
        Utils.closeQuietly(null);
        Utils.closeQuietly(new FileInputStream("./test.txt"));
	}
}