EqualsHashCodeCheck.java

////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2018 the original author or authors.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

package com.puppycrawl.tools.checkstyle.checks.coding;

import java.util.HashMap;
import java.util.Map;

import antlr.collections.AST;
import com.puppycrawl.tools.checkstyle.FileStatefulCheck;
import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.FullIdent;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
import com.puppycrawl.tools.checkstyle.utils.CheckUtils;

/**
 * <p>
 * Checks that classes that either override {@code equals()} or {@code hashCode()} also
 * overrides the other.
 * This checks only verifies that the method declarations match {@link Object#equals(Object)} and
 * {@link Object#hashCode()} exactly to be considered an override. This check does not verify
 * invalid method names, parameters other than {@code Object}, or anything else.
 * </p>
 * <p>
 * Rationale: The contract of equals() and hashCode() requires that
 * equal objects have the same hashCode. Hence, whenever you override
 * equals() you must override hashCode() to ensure that your class can
 * be used in collections that are hash based.
 * </p>
 * <p>
 * An example of how to configure the check is:
 * </p>
 * <pre>
 * &lt;module name="EqualsHashCode"/&gt;
 * </pre>
 * @author lkuehne
 */
@FileStatefulCheck
public class EqualsHashCodeCheck
        extends AbstractCheck {

    // implementation note: we have to use the following members to
    // keep track of definitions in different inner classes

    /**
     * A key is pointing to the warning message text in "messages.properties"
     * file.
     */
    public static final String MSG_KEY_HASHCODE = "equals.noHashCode";

    /**
     * A key is pointing to the warning message text in "messages.properties"
     * file.
     */
    public static final String MSG_KEY_EQUALS = "equals.noEquals";

    /** Maps OBJ_BLOCK to the method definition of equals(). */
    private final Map<DetailAST, DetailAST> objBlockWithEquals = new HashMap<>();

    /** Maps OBJ_BLOCKs to the method definition of hashCode(). */
    private final Map<DetailAST, DetailAST> objBlockWithHashCode = new HashMap<>();

    @Override
    public int[] getDefaultTokens() {
        return getRequiredTokens();
    }

    @Override
    public int[] getAcceptableTokens() {
        return getRequiredTokens();
    }

    @Override
    public int[] getRequiredTokens() {
        return new int[] {TokenTypes.METHOD_DEF};
    }

    @Override
    public void beginTree(DetailAST rootAST) {
        objBlockWithEquals.clear();
        objBlockWithHashCode.clear();
    }

    @Override
    public void visitToken(DetailAST ast) {
        if (isEqualsMethod(ast)) {
            objBlockWithEquals.put(ast.getParent(), ast);
        }
        else if (isHashCodeMethod(ast)) {
            objBlockWithHashCode.put(ast.getParent(), ast);
        }
    }

    /**
     * Determines if an AST is a valid Equals method implementation.
     *
     * @param ast the AST to check
     * @return true if the {code ast} is a Equals method.
     */
    private static boolean isEqualsMethod(DetailAST ast) {
        final DetailAST modifiers = ast.getFirstChild();
        final DetailAST parameters = ast.findFirstToken(TokenTypes.PARAMETERS);

        return CheckUtils.isEqualsMethod(ast)
                && modifiers.findFirstToken(TokenTypes.LITERAL_PUBLIC) != null
                && isObjectParam(parameters.getFirstChild())
                && (ast.findFirstToken(TokenTypes.SLIST) != null
                        || modifiers.findFirstToken(TokenTypes.LITERAL_NATIVE) != null);
    }

    /**
     * Determines if an AST is a valid HashCode method implementation.
     *
     * @param ast the AST to check
     * @return true if the {code ast} is a HashCode method.
     */
    private static boolean isHashCodeMethod(DetailAST ast) {
        final DetailAST modifiers = ast.getFirstChild();
        final AST type = ast.findFirstToken(TokenTypes.TYPE);
        final AST methodName = ast.findFirstToken(TokenTypes.IDENT);
        final DetailAST parameters = ast.findFirstToken(TokenTypes.PARAMETERS);

        return type.getFirstChild().getType() == TokenTypes.LITERAL_INT
                && "hashCode".equals(methodName.getText())
                && modifiers.findFirstToken(TokenTypes.LITERAL_PUBLIC) != null
                && modifiers.findFirstToken(TokenTypes.LITERAL_STATIC) == null
                && parameters.getFirstChild() == null
                && (ast.findFirstToken(TokenTypes.SLIST) != null
                        || modifiers.findFirstToken(TokenTypes.LITERAL_NATIVE) != null);
    }

    /**
     * Determines if an AST is a formal param of type Object.
     * @param paramNode the AST to check
     * @return true if firstChild is a parameter of an Object type.
     */
    private static boolean isObjectParam(DetailAST paramNode) {
        final DetailAST typeNode = paramNode.findFirstToken(TokenTypes.TYPE);
        final FullIdent fullIdent = FullIdent.createFullIdentBelow(typeNode);
        final String name = fullIdent.getText();
        return "Object".equals(name) || "java.lang.Object".equals(name);
    }

    @Override
    public void finishTree(DetailAST rootAST) {
        objBlockWithEquals
            .entrySet().stream().filter(detailASTDetailASTEntry -> {
                return objBlockWithHashCode.remove(detailASTDetailASTEntry.getKey()) == null;
            }).forEach(detailASTDetailASTEntry -> {
                final DetailAST equalsAST = detailASTDetailASTEntry.getValue();
                log(equalsAST.getLineNo(), equalsAST.getColumnNo(), MSG_KEY_HASHCODE);
            });
        objBlockWithHashCode.forEach((key, equalsAST) -> {
            log(equalsAST.getLineNo(), equalsAST.getColumnNo(), MSG_KEY_EQUALS);
        });
    }

}



























Active mutators

INCREMENTS_MUTATOR
VOID_METHOD_CALL_MUTATOR
RETURN_VALS_MUTATOR
MATH_MUTATOR
NEGATE_CONDITIONALS_MUTATOR
INVERT_NEGS_MUTATOR
CONDITIONALS_BOUNDARY_MUTATOR

Tests examined

com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (12 ms)
com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testMultipleInputs(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (29 ms)
com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testBooleanMethods(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (15 ms)
com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testTokensNotNull(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (1 ms)
com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (8 ms)
com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testEqualsParameter(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) (13 ms)

Report generated by PIT 1.3.1

1		////////////////////////////////////////////////////////////////////////////////
2		// checkstyle: Checks Java source code for adherence to a set of rules.
3		// Copyright (C) 2001-2018 the original author or authors.
4		//
5		// This library is free software; you can redistribute it and/or
6		// modify it under the terms of the GNU Lesser General Public
7		// License as published by the Free Software Foundation; either
8		// version 2.1 of the License, or (at your option) any later version.
9		//
10		// This library is distributed in the hope that it will be useful,
11		// but WITHOUT ANY WARRANTY; without even the implied warranty of
12		// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13		// Lesser General Public License for more details.
14		//
15		// You should have received a copy of the GNU Lesser General Public
16		// License along with this library; if not, write to the Free Software
17		// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18		////////////////////////////////////////////////////////////////////////////////
19
20		package com.puppycrawl.tools.checkstyle.checks.coding;
21
22		import java.util.HashMap;
23		import java.util.Map;
24
25		import antlr.collections.AST;
26		import com.puppycrawl.tools.checkstyle.FileStatefulCheck;
27		import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
28		import com.puppycrawl.tools.checkstyle.api.DetailAST;
29		import com.puppycrawl.tools.checkstyle.api.FullIdent;
30		import com.puppycrawl.tools.checkstyle.api.TokenTypes;
31		import com.puppycrawl.tools.checkstyle.utils.CheckUtils;
32
33		/**
34		* <p>
35		* Checks that classes that either override {@code equals()} or {@code hashCode()} also
36		* overrides the other.
37		* This checks only verifies that the method declarations match {@link Object#equals(Object)} and
38		* {@link Object#hashCode()} exactly to be considered an override. This check does not verify
39		* invalid method names, parameters other than {@code Object}, or anything else.
40		* </p>
41		* <p>
42		* Rationale: The contract of equals() and hashCode() requires that
43		* equal objects have the same hashCode. Hence, whenever you override
44		* equals() you must override hashCode() to ensure that your class can
45		* be used in collections that are hash based.
46		* </p>
47		* <p>
48		* An example of how to configure the check is:
49		* </p>
50		* <pre>
51		* <module name="EqualsHashCode"/>
52		* </pre>
53		* @author lkuehne
54		*/
55		@FileStatefulCheck
56		public class EqualsHashCodeCheck
57		extends AbstractCheck {
58
59		// implementation note: we have to use the following members to
60		// keep track of definitions in different inner classes
61
62		/**
63		* A key is pointing to the warning message text in "messages.properties"
64		* file.
65		*/
66		public static final String MSG_KEY_HASHCODE = "equals.noHashCode";
67
68		/**
69		* A key is pointing to the warning message text in "messages.properties"
70		* file.
71		*/
72		public static final String MSG_KEY_EQUALS = "equals.noEquals";
73
74		/** Maps OBJ_BLOCK to the method definition of equals(). */
75		private final Map<DetailAST, DetailAST> objBlockWithEquals = new HashMap<>();
76
77		/** Maps OBJ_BLOCKs to the method definition of hashCode(). */
78		private final Map<DetailAST, DetailAST> objBlockWithHashCode = new HashMap<>();
79
80		@Override
81		public int[] getDefaultTokens() {
82	1 1. getDefaultTokens : mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getDefaultTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED	return getRequiredTokens();
83		}
84
85		@Override
86		public int[] getAcceptableTokens() {
87	1 1. getAcceptableTokens : mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getAcceptableTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED	return getRequiredTokens();
88		}
89
90		@Override
91		public int[] getRequiredTokens() {
92	1 1. getRequiredTokens : mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getRequiredTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED	return new int[] {TokenTypes.METHOD_DEF};
93		}
94
95		@Override
96		public void beginTree(DetailAST rootAST) {
97	1 1. beginTree : removed call to java/util/Map::clear → KILLED	objBlockWithEquals.clear();
98	1 1. beginTree : removed call to java/util/Map::clear → KILLED	objBlockWithHashCode.clear();
99		}
100
101		@Override
102		public void visitToken(DetailAST ast) {
103	1 1. visitToken : negated conditional → KILLED	if (isEqualsMethod(ast)) {
104		objBlockWithEquals.put(ast.getParent(), ast);
105		}
106	1 1. visitToken : negated conditional → KILLED	else if (isHashCodeMethod(ast)) {
107		objBlockWithHashCode.put(ast.getParent(), ast);
108		}
109		}
110
111		/**
112		* Determines if an AST is a valid Equals method implementation.
113		*
114		* @param ast the AST to check
115		* @return true if the {code ast} is a Equals method.
116		*/
117		private static boolean isEqualsMethod(DetailAST ast) {
118		final DetailAST modifiers = ast.getFirstChild();
119		final DetailAST parameters = ast.findFirstToken(TokenTypes.PARAMETERS);
120
121	2 1. isEqualsMethod : negated conditional → KILLED 2. isEqualsMethod : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return CheckUtils.isEqualsMethod(ast)
122	1 1. isEqualsMethod : negated conditional → KILLED	&& modifiers.findFirstToken(TokenTypes.LITERAL_PUBLIC) != null
123	1 1. isEqualsMethod : negated conditional → KILLED	&& isObjectParam(parameters.getFirstChild())
124	1 1. isEqualsMethod : negated conditional → KILLED	&& (ast.findFirstToken(TokenTypes.SLIST) != null
125	1 1. isEqualsMethod : negated conditional → KILLED	\|\| modifiers.findFirstToken(TokenTypes.LITERAL_NATIVE) != null);
126		}
127
128		/**
129		* Determines if an AST is a valid HashCode method implementation.
130		*
131		* @param ast the AST to check
132		* @return true if the {code ast} is a HashCode method.
133		*/
134		private static boolean isHashCodeMethod(DetailAST ast) {
135		final DetailAST modifiers = ast.getFirstChild();
136		final AST type = ast.findFirstToken(TokenTypes.TYPE);
137		final AST methodName = ast.findFirstToken(TokenTypes.IDENT);
138		final DetailAST parameters = ast.findFirstToken(TokenTypes.PARAMETERS);
139
140	2 1. isHashCodeMethod : negated conditional → KILLED 2. isHashCodeMethod : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return type.getFirstChild().getType() == TokenTypes.LITERAL_INT
141	1 1. isHashCodeMethod : negated conditional → KILLED	&& "hashCode".equals(methodName.getText())
142	1 1. isHashCodeMethod : negated conditional → KILLED	&& modifiers.findFirstToken(TokenTypes.LITERAL_PUBLIC) != null
143	1 1. isHashCodeMethod : negated conditional → KILLED	&& modifiers.findFirstToken(TokenTypes.LITERAL_STATIC) == null
144	1 1. isHashCodeMethod : negated conditional → KILLED	&& parameters.getFirstChild() == null
145	1 1. isHashCodeMethod : negated conditional → KILLED	&& (ast.findFirstToken(TokenTypes.SLIST) != null
146	1 1. isHashCodeMethod : negated conditional → KILLED	\|\| modifiers.findFirstToken(TokenTypes.LITERAL_NATIVE) != null);
147		}
148
149		/**
150		* Determines if an AST is a formal param of type Object.
151		* @param paramNode the AST to check
152		* @return true if firstChild is a parameter of an Object type.
153		*/
154		private static boolean isObjectParam(DetailAST paramNode) {
155		final DetailAST typeNode = paramNode.findFirstToken(TokenTypes.TYPE);
156		final FullIdent fullIdent = FullIdent.createFullIdentBelow(typeNode);
157		final String name = fullIdent.getText();
158	3 1. isObjectParam : negated conditional → KILLED 2. isObjectParam : negated conditional → KILLED 3. isObjectParam : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return "Object".equals(name) \|\| "java.lang.Object".equals(name);
159		}
160
161		@Override
162		public void finishTree(DetailAST rootAST) {
163		objBlockWithEquals
164		.entrySet().stream().filter(detailASTDetailASTEntry -> {
165	2 1. lambda$finishTree$0 : negated conditional → KILLED 2. lambda$finishTree$0 : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED	return objBlockWithHashCode.remove(detailASTDetailASTEntry.getKey()) == null;
166	1 1. finishTree : removed call to java/util/stream/Stream::forEach → KILLED	}).forEach(detailASTDetailASTEntry -> {
167		final DetailAST equalsAST = detailASTDetailASTEntry.getValue();
168	1 1. lambda$finishTree$1 : removed call to com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::log → KILLED	log(equalsAST.getLineNo(), equalsAST.getColumnNo(), MSG_KEY_HASHCODE);
169		});
170	1 1. finishTree : removed call to java/util/Map::forEach → KILLED	objBlockWithHashCode.forEach((key, equalsAST) -> {
171	1 1. lambda$finishTree$2 : removed call to com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::log → KILLED	log(equalsAST.getLineNo(), equalsAST.getColumnNo(), MSG_KEY_EQUALS);
172		});
173		}
174
175		}
		Mutations
82		1.1 Location : getDefaultTokens Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testTokensNotNull(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getDefaultTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED
87		1.1 Location : getAcceptableTokens Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testTokensNotNull(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getAcceptableTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED
92		1.1 Location : getRequiredTokens Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testTokensNotNull(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) mutated return of Object value for com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::getRequiredTokens to ( if (x != null) null else throw new RuntimeException ) → KILLED
97		1.1 Location : beginTree Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testMultipleInputs(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to java/util/Map::clear → KILLED
98		1.1 Location : beginTree Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testMultipleInputs(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to java/util/Map::clear → KILLED
103		1.1 Location : visitToken Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
106		1.1 Location : visitToken Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
121		1.1 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED 2.2 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
122		1.1 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
123		1.1 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
124		1.1 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
125		1.1 Location : isEqualsMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testEqualsParameter(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
140		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED 2.2 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
141		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
142		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
143		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
144		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
145		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
146		1.1 Location : isHashCodeMethod Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testEqualsParameter(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED
158		1.1 Location : isObjectParam Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED 2.2 Location : isObjectParam Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED 3.3 Location : isObjectParam Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
165		1.1 Location : lambda$finishTree$0 Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) negated conditional → KILLED 2.2 Location : lambda$finishTree$0 Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
166		1.1 Location : finishTree Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to java/util/stream/Stream::forEach → KILLED
168		1.1 Location : lambda$finishTree$1 Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testSemantic(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::log → KILLED
170		1.1 Location : finishTree Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to java/util/Map::forEach → KILLED
171		1.1 Location : lambda$finishTree$2 Killed by : com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest.testNoEquals(com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheckTest) removed call to com/puppycrawl/tools/checkstyle/checks/coding/EqualsHashCodeCheck::log → KILLED

EqualsHashCodeCheck.java

Mutations

Active mutators

Tests examined