package Blatt18;

import java.io.*;

import org.junit.Test;

import static org.junit.Assert.*;

public class ToUpperCaseWriterTest {

	public void test(char c, char result) {

		try(ByteArrayOutputStream baos = new ByteArrayOutputStream();
				OutputStreamWriter osw = new OutputStreamWriter(baos);
				ToUpperCaseWriter writer = new ToUpperCaseWriter(osw);) {



				writer.write(c);
				writer.flush();
				String upperCase = baos.toString();
				assertEquals(result, upperCase);
		}
		catch(IOException e){
			fail("IOException" + e.getMessage());
		}
	}
	@Test
	public void writeCharTest() {
		test('a', 'A');
	}
	@Test
	public void writeCharTestWithNoChar() {
		test('1', '1');
	}
	@Test
	public void asciiCode() {
		char[] ca = new char[128];
		for(int i = 0; i < ca.length; i++){
			ca[i] = (char) i;
		}
		for(int i = 0; i < ca.length; i++) {
			if(i < 97 || i > 122) {
				test(ca[i], ca[i]);
			}
			else{
				char temp = Character.toUpperCase(ca[i]);
				test(ca[i], temp);
			}
		}
	}
}