ioutilswritetestcase.java

java 的io 操作类 java 的io 操作类

    public void testWrite_charArrayToOutputStream() throws Exception {
        String str = new String(inData, "US-ASCII");
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);

        IOUtils.write(str.toCharArray(), out);
        out.off();
        out.flush();

        assertEquals("Sizes differ", inData.length, baout.size());
        assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
    }

    public void testWrite_charArrayToOutputStream_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        
        IOUtils.write((char[]) null, out);
        out.off();
        out.flush();

        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWrite_charArrayToOutputStream_nullStream() throws Exception {
        String str = new String(inData, "US-ASCII");
        try {
            IOUtils.write(str.toCharArray(), (OutputStream) null);
            fail();
        } catch (NullPointerException ex) {}
    }

    //-----------------------------------------------------------------------
    public void testWrite_charArrayToOutputStream_Encoding() throws Exception {
        String str = new String(inData, "US-ASCII");
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);

        IOUtils.write(str.toCharArray(), out, "UTF16");
        out.off();
        out.flush();
        
        byte[] bytes = baout.toByteArray();
        bytes = new String(bytes, "UTF16").getBytes("US-ASCII");
        assertTrue("Content differs", Arrays.equals(inData, bytes));
    }

    public void testWrite_charArrayToOutputStream_Encoding_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        
        IOUtils.write((char[]) null, out);
        out.off();
        out.flush();

        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWrite_charArrayToOutputStream_Encoding_nullStream() throws Exception {
        String str = new String(inData, "US-ASCII");
        try {
            IOUtils.write(str.toCharArray(), (OutputStream) null);
            fail();
        } catch (NullPointerException ex) {}
    }

    public void testWrite_charArrayToOutputStream_nullEncoding() throws Exception {
        String str = new String(inData, "US-ASCII");
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);

        IOUtils.write(str.toCharArray(), out, null);
        out.off();
        out.flush();

        assertEquals("Sizes differ", inData.length, baout.size());
        assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
    }

    //-----------------------------------------------------------------------
    public void testWrite_charArrayToWriter() throws Exception {
        String str = new String(inData, "US-ASCII");

        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        Writer writer = new OutputStreamWriter(baout, "US-ASCII");

        IOUtils.write(str.toCharArray(), writer);
        out.off();
        writer.flush();

        assertEquals("Sizes differ", inData.length, baout.size());
        assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
    }

    public void testWrite_charArrayToWriter_Encoding_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        Writer writer = new OutputStreamWriter(baout, "US-ASCII");
        
        IOUtils.write((char[]) null, writer);
        out.off();
        writer.flush();

        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWrite_charArrayToWriter_Encoding_nullStream() throws Exception {
        String str = new String(inData, "US-ASCII");
        try {
            IOUtils.write(str.toCharArray(), (Writer) null);
            fail();
        } catch (NullPointerException ex) {}
    }

    //-----------------------------------------------------------------------
    public void testWriteLines_OutputStream() throws Exception {
        Object[] data = new Object[] {
            "hello", new StringBuffer("world"), "", "this is", null, "some text"};
        List list = Arrays.asList(data);
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines(list, "*", out);
        
        out.off();
        out.flush();
        
        String expected = "hello*world**this is**some text*";
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    public void testWriteLines_OutputStream_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines((List) null, "*", out);
        out.off();
        out.flush();
        
        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWriteLines_OutputStream_nullSeparator() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
            
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines(list, (String) null, out);
        out.off();
        out.flush();
        
        String expected = "hello" + IOUtils.LINE_SEPARATOR + "world" + IOUtils.LINE_SEPARATOR;
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    public void testWriteLines_OutputStream_nullStream() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
        try {
            IOUtils.writeLines(list, "*", (OutputStream) null);
            fail();
        } catch (NullPointerException ex) {}
    }

    //-----------------------------------------------------------------------
    public void testWriteLines_OutputStream_Encoding() throws Exception {
        Object[] data = new Object[] {
            "hello\u8364", new StringBuffer("world"), "", "this is", null, "some text"};
        List list = Arrays.asList(data);
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines(list, "*", out, "UTF-8");
        
        out.off();
        out.flush();
        
        String expected = "hello\u8364*world**this is**some text*";
        String actual = baout.toString("UTF-8");
        assertEquals(expected, actual);
    }

    public void testWriteLines_OutputStream_Encoding_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines((List) null, "*", out, "US-ASCII");
        out.off();
        out.flush();
        
        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWriteLines_OutputStream_Encoding_nullSeparator() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
            
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines(list, (String) null, out, "US-ASCII");
        out.off();
        out.flush();
        
        String expected = "hello" + IOUtils.LINE_SEPARATOR + "world" + IOUtils.LINE_SEPARATOR;
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    public void testWriteLines_OutputStream_Encoding_nullStream() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
        try {
            IOUtils.writeLines(list, "*", (OutputStream) null, "US-ASCII");
            fail();
        } catch (NullPointerException ex) {}
    }

    public void testWriteLines_OutputStream_Encoding_nullEncoding() throws Exception {
        Object[] data = new Object[] {
            "hello", new StringBuffer("world"), "", "this is", null, "some text"};
        List list = Arrays.asList(data);
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
        
        IOUtils.writeLines(list, "*", out, null);
        
        out.off();
        out.flush();
        
        String expected = "hello*world**this is**some text*";
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    //-----------------------------------------------------------------------
    public void testWriteLines_Writer() throws Exception {
        Object[] data = new Object[] {
            "hello", new StringBuffer("world"), "", "this is", null, "some text"};
        List list = Arrays.asList(data);
        
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        Writer writer = new OutputStreamWriter(baout, "US-ASCII");
        
        IOUtils.writeLines(list, "*", writer);
        
        out.off();
        writer.flush();
        
        String expected = "hello*world**this is**some text*";
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    public void testWriteLines_Writer_nullData() throws Exception {
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        Writer writer = new OutputStreamWriter(baout, "US-ASCII");
        
        IOUtils.writeLines((List) null, "*", writer);
        out.off();
        writer.flush();
        
        assertEquals("Sizes differ", 0, baout.size());
    }

    public void testWriteLines_Writer_nullSeparator() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
            
        ByteArrayOutputStream baout = new ByteArrayOutputStream();
        YellOnFlushAndCloseOutputStream out = new YellOnFlushAndCloseOutputStream(baout, true, true);
        Writer writer = new OutputStreamWriter(baout, "US-ASCII");
        
        IOUtils.writeLines(list, (String) null, writer);
        out.off();
        writer.flush();
        
        String expected = "hello" + IOUtils.LINE_SEPARATOR + "world" + IOUtils.LINE_SEPARATOR;
        String actual = baout.toString();
        assertEquals(expected, actual);
    }

    public void testWriteLines_Writer_nullStream() throws Exception {
        Object[] data = new Object[] {"hello", "world"};
        List list = Arrays.asList(data);
        try {
            IOUtils.writeLines(list, "*", (Writer) null);
            fail();
        } catch (NullPointerException ex) {}
    }

}