android-platform-libcore/luni/src/test/java/tests/api/java/io/PrintWriterTest.java

/*
 *  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 tests.api.java.io;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.util.Locale;

import tests.support.Support_StringReader;
import tests.support.Support_StringWriter;

public class PrintWriterTest extends junit.framework.TestCase {

	static class Bogus {
		public String toString() {
			return "Bogus";
		}
	}

    /**
     * @since 1.6
     */
    static class MockPrintWriter extends PrintWriter {

        public MockPrintWriter(OutputStream out, boolean autoflush) {
            super(out, autoflush);
        }

        @Override
        public void clearError() {
            super.clearError();
        }

    }

	PrintWriter pw;

	ByteArrayOutputStream bao;

	ByteArrayInputStream bai;

	BufferedReader br;

	/**
	 * @tests java.io.PrintWriter#PrintWriter(java.io.OutputStream)
	 */
	public void test_ConstructorLjava_io_OutputStream() {
		// Test for method java.io.PrintWriter(java.io.OutputStream)
		String s;
		pw.println("Random Chars");
		pw.write("Hello World");
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			assertTrue("Incorrect string written/read: " + s, s
					.equals("Random Chars"));
			s = br.readLine();
			assertTrue("Incorrect string written/read: " + s, s
					.equals("Hello World"));
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
	}

	/**
	 * @tests java.io.PrintWriter#PrintWriter(java.io.OutputStream, boolean)
	 */
	public void test_ConstructorLjava_io_OutputStreamZ() {
		// Test for method java.io.PrintWriter(java.io.OutputStream, boolean)
		String s;
		pw = new PrintWriter(bao, true);
		pw.println("Random Chars");
		pw.write("Hello World");
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			assertTrue("Incorrect string written/read: " + s, s
					.equals("Random Chars"));
			pw.flush();
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			assertTrue("Incorrect string written/read: " + s, s
					.equals("Random Chars"));
			s = br.readLine();
			assertTrue("Incorrect string written/read: " + s, s
					.equals("Hello World"));
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
	}

	/**
	 * @tests java.io.PrintWriter#PrintWriter(java.io.Writer)
	 */
	public void test_ConstructorLjava_io_Writer() {
		// Test for method java.io.PrintWriter(java.io.Writer)
		Support_StringWriter sw;
		pw = new PrintWriter(sw = new Support_StringWriter());
		pw.print("Hello");
		pw.flush();
		assertEquals("Failed to construct proper writer",
				"Hello", sw.toString());
	}

	/**
	 * @tests java.io.PrintWriter#PrintWriter(java.io.Writer, boolean)
	 */
	public void test_ConstructorLjava_io_WriterZ() {
		// Test for method java.io.PrintWriter(java.io.Writer, boolean)
		Support_StringWriter sw;
		pw = new PrintWriter(sw = new Support_StringWriter(), true);
		pw.print("Hello");
		// Auto-flush should have happened
		assertEquals("Failed to construct proper writer",
				"Hello", sw.toString());
	}

    /**
     * @tests java.io.PrintWriter#PrintWriter(java.io.File)
     */
    public void test_ConstructorLjava_io_File() throws Exception {
        File file = File.createTempFile(getClass().getName(), null);
        try {
            PrintWriter writer = new PrintWriter(file);
            writer.close();
        } finally {
            file.delete();
        }
    }

    /**
     * @tests java.io.PrintWriter#PrintWriter(java.io.File, java.lang.String)
     */
    public void test_ConstructorLjava_io_File_Ljava_lang_String() throws Exception {
        File file = File.createTempFile(getClass().getName(), null);
        try {
            PrintWriter writer = new PrintWriter(file,
                    Charset.defaultCharset().name());
            writer.close();
        } finally {
            file.delete();
        }
    }

    /**
     * @tests java.io.PrintWriter#PrintWriter(java.lang.String)
     */
    public void test_ConstructorLjava_lang_String() throws Exception {
        File file = File.createTempFile(getClass().getName(), null);
        try {
            PrintWriter writer = new PrintWriter(file.getPath());
            writer.close();
        } finally {
            file.delete();
        }
    }

    /**
     * @tests java.io.PrintWriter#PrintWriter(java.lang.String, java.lang.String)
     */
    public void test_ConstructorLjava_lang_String_Ljava_lang_String() throws Exception {
        File file = File.createTempFile(getClass().getName(), null);
        try {
            PrintWriter writer = new PrintWriter(file.getPath(),
                    Charset.defaultCharset().name());
            writer.close();
        } finally {
            file.delete();
        }
    }

	/**
	 * @tests java.io.PrintWriter#checkError()
	 */
	public void test_checkError() {
		// Test for method boolean java.io.PrintWriter.checkError()
		pw.close();
		pw.print(490000000000.08765);
		assertTrue("Failed to return error", pw.checkError());
	}

    /**
     * @tests java.io.PrintWriter#clearError()
     * @since 1.6
     */
    public void test_clearError() {
        // Test for method boolean java.io.PrintWriter.clearError()
        MockPrintWriter mpw = new MockPrintWriter(new ByteArrayOutputStream(), false);
        mpw.close();
        mpw.print(490000000000.08765);
        assertTrue("Failed to return error", mpw.checkError());
        mpw.clearError();
        assertFalse("Internal error state has not be cleared", mpw.checkError());
    }

	/**
	 * @tests java.io.PrintWriter#close()
	 */
	public void test_close() {
		// Test for method void java.io.PrintWriter.close()
		pw.close();
		pw.println("l");
		assertTrue("Write on closed stream failed to generate error", pw
				.checkError());
	}

	/**
	 * @tests java.io.PrintWriter#flush()
	 */
	public void test_flush() {
		// Test for method void java.io.PrintWriter.flush()
		final double dub = 490000000000.08765;
		pw.print(dub);
		pw.flush();
		assertTrue("Failed to flush", new String(bao.toByteArray())
				.equals(String.valueOf(dub)));
	}

	/**
	 * @tests java.io.PrintWriter#print(char[])
	 */
	public void test_print$C() {
		// Test for method void java.io.PrintWriter.print(char [])
		String s = null;
		char[] schars = new char[11];
		"Hello World".getChars(0, 11, schars, 0);
		pw.print(schars);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s
				.equals("Hello World"));
		int r = 0;
		try {
			pw.print((char[]) null);
		} catch (NullPointerException e) {
			r = 1;
		}
		assertEquals("null pointer exception for printing null char[] is not caught",
				1, r);
	}

	/**
	 * @tests java.io.PrintWriter#print(char)
	 */
	public void test_printC() {
		// Test for method void java.io.PrintWriter.print(char)
		pw.print('c');
		pw.flush();
		assertEquals("Wrote incorrect char string", "c", new String(bao.toByteArray())
				);
	}

	/**
	 * @tests java.io.PrintWriter#print(double)
	 */
	public void test_printD() {
		// Test for method void java.io.PrintWriter.print(double)
		final double dub = 490000000000.08765;
		pw.print(dub);
		pw.flush();
		assertTrue("Wrote incorrect double string", new String(bao
				.toByteArray()).equals(String.valueOf(dub)));
	}

	/**
	 * @tests java.io.PrintWriter#print(float)
	 */
	public void test_printF() {
		// Test for method void java.io.PrintWriter.print(float)
		final float flo = 49.08765f;
		pw.print(flo);
		pw.flush();
		assertTrue("Wrote incorrect float string",
				new String(bao.toByteArray()).equals(String.valueOf(flo)));
	}

	/**
	 * @tests java.io.PrintWriter#print(int)
	 */
	public void test_printI() {
		// Test for method void java.io.PrintWriter.print(int)
		pw.print(4908765);
		pw.flush();
		assertEquals("Wrote incorrect int string", "4908765", new String(bao.toByteArray())
				);
	}

	/**
	 * @tests java.io.PrintWriter#print(long)
	 */
	public void test_printJ() {
		// Test for method void java.io.PrintWriter.print(long)
		pw.print(49087650000L);
		pw.flush();
		assertEquals("Wrote incorrect long string", "49087650000", new String(bao.toByteArray())
				);
	}

	/**
	 * @tests java.io.PrintWriter#print(java.lang.Object)
	 */
	public void test_printLjava_lang_Object() {
		// Test for method void java.io.PrintWriter.print(java.lang.Object)
		pw.print((Object) null);
		pw.flush();
		assertEquals("Did not write null", "null", new String(bao.toByteArray())
				);
		bao.reset();

		pw.print(new Bogus());
		pw.flush();
		assertEquals("Wrote in incorrect Object string", "Bogus", new String(bao
				.toByteArray()));
	}

	/**
	 * @tests java.io.PrintWriter#print(java.lang.String)
	 */
	public void test_printLjava_lang_String() {
		// Test for method void java.io.PrintWriter.print(java.lang.String)
		pw.print((String) null);
		pw.flush();
		assertEquals("did not write null", "null", new String(bao.toByteArray())
				);
		bao.reset();

		pw.print("Hello World");
		pw.flush();
		assertEquals("Wrote incorrect  string", "Hello World", new String(bao.toByteArray())
				);
	}

	/**
	 * @tests java.io.PrintWriter#print(boolean)
	 */
	public void test_printZ() {
		// Test for method void java.io.PrintWriter.print(boolean)
		pw.print(true);
		pw.flush();
		assertEquals("Wrote in incorrect boolean string", "true", new String(bao
				.toByteArray()));
	}

	/**
	 * @tests java.io.PrintWriter#println()
	 */
	public void test_println() {
		// Test for method void java.io.PrintWriter.println()
		String s;
		pw.println("Blarg");
		pw.println();
		pw.println("Bleep");
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			assertTrue("Wrote incorrect line: " + s, s.equals("Blarg"));
			s = br.readLine();
			assertTrue("Wrote incorrect line: " + s, s.equals(""));
			s = br.readLine();
			assertTrue("Wrote incorrect line: " + s, s.equals("Bleep"));
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
	}

	/**
	 * @tests java.io.PrintWriter#println(char[])
	 */
	public void test_println$C() {
		// Test for method void java.io.PrintWriter.println(char [])
		String s = null;
		char[] schars = new char[11];
		"Hello World".getChars(0, 11, schars, 0);
		pw.println("Random Chars");
		pw.println(schars);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s
				.equals("Hello World"));
	}

	/**
	 * @tests java.io.PrintWriter#println(char)
	 */
	public void test_printlnC() {
		// Test for method void java.io.PrintWriter.println(char)
		String s = null;
		pw.println("Random Chars");
		pw.println('c');
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			s = br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char string: " + s, s.equals("c"));
	}

	/**
	 * @tests java.io.PrintWriter#println(double)
	 */
	public void test_printlnD() {
		// Test for method void java.io.PrintWriter.println(double)
		String s = null;
		final double dub = 4000000000000000.657483;
		pw.println("Random Chars");
		pw.println(dub);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect double string: " + s, s.equals(String
				.valueOf(dub)));
	}

	/**
	 * @tests java.io.PrintWriter#println(float)
	 */
	public void test_printlnF() {
		// Test for method void java.io.PrintWriter.println(float)
		String s;
		final float flo = 40.4646464f;
		pw.println("Random Chars");
		pw.println(flo);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
			assertTrue("Wrote incorrect float string: " + s + " wanted: "
					+ String.valueOf(flo), s.equals(String.valueOf(flo)));
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}

	}

	/**
	 * @tests java.io.PrintWriter#println(int)
	 */
	public void test_printlnI() {
		// Test for method void java.io.PrintWriter.println(int)
		String s = null;
		pw.println("Random Chars");
		pw.println(400000);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect int string: " + s, s.equals("400000"));
	}

	/**
	 * @tests java.io.PrintWriter#println(long)
	 */
	public void test_printlnJ() {
		// Test for method void java.io.PrintWriter.println(long)
		String s = null;
		pw.println("Random Chars");
		pw.println(4000000000000L);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect long string: " + s, s
				.equals("4000000000000"));
	}

	/**
	 * @tests java.io.PrintWriter#println(java.lang.Object)
	 */
	public void test_printlnLjava_lang_Object() {
		// Test for method void java.io.PrintWriter.println(java.lang.Object)
		String s = null;
		pw.println("Random Chars");
		pw.println(new Bogus());
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect Object string: " + s, s.equals("Bogus"));
	}

	/**
	 * @tests java.io.PrintWriter#println(java.lang.String)
	 */
	public void test_printlnLjava_lang_String() {
		// Test for method void java.io.PrintWriter.println(java.lang.String)
		String s = null;
		pw.println("Random Chars");
		pw.println("Hello World");
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect string: " + s, s.equals("Hello World"));
	}

	/**
	 * @tests java.io.PrintWriter#println(boolean)
	 */
	public void test_printlnZ() {
		// Test for method void java.io.PrintWriter.println(boolean)
		String s = null;
		pw.println("Random Chars");
		pw.println(false);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect boolean string: " + s, s.equals("false"));
	}

	/**
	 * @tests java.io.PrintWriter#write(char[])
	 */
	public void test_write$C() {
		// Test for method void java.io.PrintWriter.write(char [])
		String s = null;
		char[] schars = new char[11];
		"Hello World".getChars(0, 11, schars, 0);
		pw.println("Random Chars");
		pw.write(schars);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test: " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s
				.equals("Hello World"));
	}

	/**
	 * @tests java.io.PrintWriter#write(char[], int, int)
	 */
	public void test_write$CII() {
		// Test for method void java.io.PrintWriter.write(char [], int, int)
		String s = null;
		char[] schars = new char[11];
		"Hello World".getChars(0, 11, schars, 0);
		pw.println("Random Chars");
		pw.write(schars, 6, 5);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s.equals("World"));
	}

	/**
	 * @tests java.io.PrintWriter#write(int)
	 */
	public void test_writeI() throws IOException {
		// Test for method void java.io.PrintWriter.write(int)
		char[] cab = new char[3];
		pw.write('a');
		pw.write('b');
		pw.write('c');
		pw.flush();
		InputStreamReader isr = new InputStreamReader(new ByteArrayInputStream(bao.toByteArray()));
		cab[0] = (char) isr.read();
		cab[1] = (char) isr.read();
		cab[2] = (char) isr.read();
		assertTrue("Wrote incorrect ints", cab[0] == 'a' && cab[1] == 'b'
				&& cab[2] == 'c');

	}

	/**
	 * @tests java.io.PrintWriter#write(java.lang.String)
	 */
	public void test_writeLjava_lang_String() {
		// Test for method void java.io.PrintWriter.write(java.lang.String)
		String s = null;
		pw.println("Random Chars");
		pw.write("Hello World");
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s
				.equals("Hello World"));
	}

	/**
	 * @tests java.io.PrintWriter#write(java.lang.String, int, int)
	 */
	public void test_writeLjava_lang_StringII() {
		// Test for method void java.io.PrintWriter.write(java.lang.String, int,
		// int)
		String s = null;
		pw.println("Random Chars");
		pw.write("Hello World", 6, 5);
		pw.flush();
		try {
			br = new BufferedReader(new Support_StringReader(bao.toString()));
			br.readLine();
			s = br.readLine();
		} catch (IOException e) {
			fail("IOException during test : " + e.getMessage());
		}
		assertTrue("Wrote incorrect char[] string: " + s, s.equals("World"));
	}
	
	/**
	 * @tests java.io.PrintWriter#append(char)
	 */
	public void test_appendChar() {
	char testChar = ' ';
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	PrintWriter printWriter = new PrintWriter(out);
	printWriter.append(testChar);
	printWriter.flush();
	assertEquals(String.valueOf(testChar),out.toString());
	printWriter.close();
	}
	/**
	 * @tests java.io.PrintWriter#append(CharSequence)
	 */
	public void test_appendCharSequence() {
		
		String testString = "My Test String";
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		PrintWriter printWriter = new PrintWriter(out);
		printWriter.append(testString);
		printWriter.flush();
		assertEquals(testString, out.toString());
		printWriter.close();	

	}

	/**
	 *  @tests java.io.PrintWriter#append(CharSequence, int, int)
	 */
	public void test_appendCharSequenceIntInt() {
		String testString = "My Test String";
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		PrintWriter printWriter = new PrintWriter(out);
		printWriter.append(testString, 1, 3);
		printWriter.flush();
		assertEquals(testString.substring(1, 3), out.toString());
		printWriter.close();

	}

    /**
     * @tests java.io.PrintWriter#format(java.lang.String, java.lang.Object...)
     */
    public void test_formatLjava_lang_String$Ljava_lang_Object() {
        pw.format("%s %s", "Hello", "World");
        pw.flush();
        assertEquals("Wrote incorrect string", "Hello World",
                new String(bao.toByteArray()));
    }

    /**
     * @tests java.io.PrintWriter#format(java.util.Locale, java.lang.String, java.lang.Object...)
     */
    public void test_formatLjava_util_Locale_Ljava_lang_String_$Ljava_lang_Object() {
        pw.format(Locale.US, "%s %s", "Hello", "World");
        pw.flush();
        assertEquals("Wrote incorrect string", "Hello World",
                new String(bao.toByteArray()));
    }

    /**
     * @tests java.io.PrintWriter#printf(java.lang.String, java.lang.Object...)
     */
    public void test_printfLjava_lang_String$Ljava_lang_Object() {
        pw.printf("%s %s", "Hello", "World");
        pw.flush();
        assertEquals("Wrote incorrect string", "Hello World",
                new String(bao.toByteArray()));
    }

    /**
     * @tests java.io.PrintWriter#printf(java.util.Locale, java.lang.String, java.lang.Object...)
     */
    public void test_printfLjava_util_Locale_Ljava_lang_String_$Ljava_lang_Object() {
        pw.printf(Locale.US, "%s %s", "Hello", "World");
        pw.flush();
        assertEquals("Wrote incorrect string", "Hello World",
                new String(bao.toByteArray()));
    }

	/**
	 * Sets up the fixture, for example, open a network connection. This method
	 * is called before a test is executed.
	 */
	protected void setUp() {
		bao = new ByteArrayOutputStream();
		pw = new PrintWriter(bao, false);

	}

	/**
	 * Tears down the fixture, for example, close a network connection. This
	 * method is called after a test is executed.
	 */
	protected void tearDown() {
		try {
			pw.close();
		} catch (Exception e) {
		}
	}
}