WiretapInputStream.java

/*-
 * #%L
 * io.earcam.instrumental.io
 * %%
 * Copyright (C) 2018 earcam
 * %%
 * SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
 * 
 * You <b>must</b> choose to accept, in full - any individual or combination of 
 * the following licenses:
 * <ul>
 * 	<li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
 * 	<li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
 * 	<li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
 * 	<li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
 * </ul>
 * #L%
 */
package io.earcam.utilitarian.io;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class WiretapInputStream extends InputStream {

	private InputStream tapped;
	private ByteArrayOutputStream tap;
	private boolean tapping;
	private boolean marked;
	private int mark;


	public WiretapInputStream(InputStream tapped, boolean tapOn)
	{
		this.tapping = tapOn;
		this.tapped = tapped;
		this.tap = new ByteArrayOutputStream();
	}


	@Override
	public synchronized void mark(int readlimit)
	{
		marked = true;
		mark = 0;
		tapped.mark(readlimit);
	}


	@Override
	public synchronized void reset() throws IOException
	{
		marked = false;
		tapped.reset();
	}


	@Override
	public long skip(long n) throws IOException
	{
		if(tapping) {
			int i = 0;
			int b;
			while(i++ < n && (b = tapped.read()) != -1) {
				tap.write(b);
			}
			return i;
		}
		return super.skip(n);
	}


	@Override
	public void close() throws IOException
	{
		tapped.close();
	}


	@Override
	public int read() throws IOException
	{
		int read = tapped.read();
		if(marked) {
			++mark;
			if(tapping) {
				tap.write(read);
			}
		} else if(mark > 0) {
			--mark;
		} else if(tapping) {
			tap.write(read);
		}
		return read;
	}


	public byte[] toByteArray()
	{
		return tap.toByteArray();
	}


	public boolean tapping()
	{
		return tapping;
	}


	public void tapping(boolean tapOn)
	{
		tapping = tapOn;
	}


	public void tapOn()
	{
		tapping(true);
	}


	public void tapOff()
	{
		tapping(false);
	}
}























Active mutators

INCREMENTS_MUTATOR
VOID_METHOD_CALL_MUTATOR
RETURN_VALS_MUTATOR
MATH_MUTATOR
NEGATE_CONDITIONALS_MUTATOR
INVERT_NEGS_MUTATOR
CONDITIONALS_BOUNDARY_MUTATOR

Tests examined

io.earcam.utilitarian.io.WiretapInputStreamTest.tappingMayCommenceAfterMarkAndReset() (3 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.readOneByteWhenTapped() (5 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.endOfStreamIsHonoured() (3 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.readOneByteWhenNotTapped() (2 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.constructorArgumentDeterminesTapIsOff() (2 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.bytesSkippedWhenTapOffAreNotStored() (3 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytesToEndOfStream() (3 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.constructorArgumentDeterminesTapIsOn() (2 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.underlyingIsClosed() (2 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.onlyStoresWhenTapOn() (3 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() (2 ms)
io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() (2 ms)

Report generated by PIT 1.4.3

1		/*-
2		* #%L
3		* io.earcam.instrumental.io
4		* %%
5		* Copyright (C) 2018 earcam
6		* %%
7		* SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
8		*
9		* You <b>must</b> choose to accept, in full - any individual or combination of
10		* the following licenses:
11		* <ul>
12		* <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
13		* <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
14		* <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
15		* <li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
16		* </ul>
17		* #L%
18		*/
19		package io.earcam.utilitarian.io;
20
21		import java.io.ByteArrayOutputStream;
22		import java.io.IOException;
23		import java.io.InputStream;
24
25		public class WiretapInputStream extends InputStream {
26
27		private InputStream tapped;
28		private ByteArrayOutputStream tap;
29		private boolean tapping;
30		private boolean marked;
31		private int mark;
32
33
34		public WiretapInputStream(InputStream tapped, boolean tapOn)
35		{
36		this.tapping = tapOn;
37		this.tapped = tapped;
38		this.tap = new ByteArrayOutputStream();
39		}
40
41
42		@Override
43		public synchronized void mark(int readlimit)
44		{
45		marked = true;
46		mark = 0;
47	1 1. mark : removed call to java/io/InputStream::mark → KILLED	tapped.mark(readlimit);
48		}
49
50
51		@Override
52		public synchronized void reset() throws IOException
53		{
54		marked = false;
55	1 1. reset : removed call to java/io/InputStream::reset → KILLED	tapped.reset();
56		}
57
58
59		@Override
60		public long skip(long n) throws IOException
61		{
62	1 1. skip : negated conditional → KILLED	if(tapping) {
63		int i = 0;
64		int b;
65	4 1. skip : changed conditional boundary → KILLED 2. skip : Changed increment from 1 to -1 → KILLED 3. skip : negated conditional → KILLED 4. skip : negated conditional → KILLED	while(i++ < n && (b = tapped.read()) != -1) {
66	1 1. skip : removed call to java/io/ByteArrayOutputStream::write → KILLED	tap.write(b);
67		}
68	1 1. skip : replaced return of long value with value + 1 for io/earcam/utilitarian/io/WiretapInputStream::skip → SURVIVED	return i;
69		}
70	1 1. skip : replaced return of long value with value + 1 for io/earcam/utilitarian/io/WiretapInputStream::skip → SURVIVED	return super.skip(n);
71		}
72
73
74		@Override
75		public void close() throws IOException
76		{
77	1 1. close : removed call to java/io/InputStream::close → KILLED	tapped.close();
78		}
79
80
81		@Override
82		public int read() throws IOException
83		{
84		int read = tapped.read();
85	1 1. read : negated conditional → KILLED	if(marked) {
86	1 1. read : Replaced integer addition with subtraction → KILLED	++mark;
87	1 1. read : negated conditional → KILLED	if(tapping) {
88	1 1. read : removed call to java/io/ByteArrayOutputStream::write → KILLED	tap.write(read);
89		}
90	2 1. read : changed conditional boundary → KILLED 2. read : negated conditional → KILLED	} else if(mark > 0) {
91	1 1. read : Replaced integer subtraction with addition → KILLED	--mark;
92	1 1. read : negated conditional → KILLED	} else if(tapping) {
93	1 1. read : removed call to java/io/ByteArrayOutputStream::write → KILLED	tap.write(read);
94		}
95	1 1. read : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return read;
96		}
97
98
99		public byte[] toByteArray()
100		{
101	1 1. toByteArray : mutated return of Object value for io/earcam/utilitarian/io/WiretapInputStream::toByteArray to ( if (x != null) null else throw new RuntimeException ) → KILLED	return tap.toByteArray();
102		}
103
104
105		public boolean tapping()
106		{
107	1 1. tapping : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return tapping;
108		}
109
110
111		public void tapping(boolean tapOn)
112		{
113		tapping = tapOn;
114		}
115
116
117		public void tapOn()
118		{
119	1 1. tapOn : removed call to io/earcam/utilitarian/io/WiretapInputStream::tapping → KILLED	tapping(true);
120		}
121
122
123		public void tapOff()
124		{
125	1 1. tapOff : removed call to io/earcam/utilitarian/io/WiretapInputStream::tapping → KILLED	tapping(false);
126		}
127		}
		Mutations
47		1.1 Location : mark Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() removed call to java/io/InputStream::mark → KILLED
55		1.1 Location : reset Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() removed call to java/io/InputStream::reset → KILLED
62		1.1 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.bytesSkippedWhenTapOffAreNotStored() negated conditional → KILLED
65		1.1 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() changed conditional boundary → KILLED 2.2 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() Changed increment from 1 to -1 → KILLED 3.3 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() negated conditional → KILLED 4.4 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() negated conditional → KILLED
66		1.1 Location : skip Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapsSkippedBytes() removed call to java/io/ByteArrayOutputStream::write → KILLED
68		1.1 Location : skip Killed by : none replaced return of long value with value + 1 for io/earcam/utilitarian/io/WiretapInputStream::skip → SURVIVED
70		1.1 Location : skip Killed by : none replaced return of long value with value + 1 for io/earcam/utilitarian/io/WiretapInputStream::skip → SURVIVED
77		1.1 Location : close Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.underlyingIsClosed() removed call to java/io/InputStream::close → KILLED
85		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() negated conditional → KILLED
86		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() Replaced integer addition with subtraction → KILLED
87		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() negated conditional → KILLED
88		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() removed call to java/io/ByteArrayOutputStream::write → KILLED
90		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() changed conditional boundary → KILLED 2.2 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() negated conditional → KILLED
91		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() Replaced integer subtraction with addition → KILLED
92		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.readOneByteWhenNotTapped() negated conditional → KILLED
93		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.tapNotAffectedByMarkAndReset() removed call to java/io/ByteArrayOutputStream::write → KILLED
95		1.1 Location : read Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.readOneByteWhenNotTapped() replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
101		1.1 Location : toByteArray Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.readOneByteWhenNotTapped() mutated return of Object value for io/earcam/utilitarian/io/WiretapInputStream::toByteArray to ( if (x != null) null else throw new RuntimeException ) → KILLED
107		1.1 Location : tapping Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.constructorArgumentDeterminesTapIsOff() replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
119		1.1 Location : tapOn Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.bytesSkippedWhenTapOffAreNotStored() removed call to io/earcam/utilitarian/io/WiretapInputStream::tapping → KILLED
125		1.1 Location : tapOff Killed by : io.earcam.utilitarian.io.WiretapInputStreamTest.onlyStoresWhenTapOn() removed call to io/earcam/utilitarian/io/WiretapInputStream::tapping → KILLED

WiretapInputStream.java

Mutations

Active mutators

Tests examined