LogUtil.java

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package com.reallifedeveloper.common.domain;
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import org.checkerframework.checker.nullness.qual.Nullable;
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import lombok.experimental.UtilityClass;
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/**
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 * A utility class to simplify working with logs.
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 *
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 * @author RealLifeDeveloper
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 */
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@UtilityClass
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public class LogUtil {
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    /**
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     * Removes all occurrences of carriage return ({@code \r}) and linefeed ({@code \n}) from a string.
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     * <p>
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     * This is useful when logging something that originates from a user, in order to avoid CRLF injection. See
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     * <a href="https://www.invicti.com/learn/crlf-injection/">https://www.invicti.com/learn/crlf-injection/</a>.
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     * <p>
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     * The method is null-safe and returns {@code null} if the input string is {@code null}.
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     *
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     * @param s the string from which to remove CRLF
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     *
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     * @return {@code s} with all occurrences of CR and LF removed
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     */
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    @SuppressWarnings({ "checkstyle:noReturnNull" })
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    public static @Nullable String removeCRLF(@Nullable String s) {
29 1 1. removeCRLF : negated conditional → KILLED
 
        if (s == null) {
30 1 1. removeCRLF : replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED
 
            return null;
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        } else {
32 1 1. removeCRLF : replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED
 
            return s.replaceAll("[\r\n]", "");
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        }
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    }
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    /**
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     * Given a non-null object, calls the {@code toString} method on the object and returns the result of calling
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     * {@link #removeCRLF(String)} on the string representation of the object.
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     * <p>
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     * For {@code null} simply returns {@code null}.
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     *
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     * @param o the object for which to remove CRLF from its string representation
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     *
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     * @return {@code o.toString()} with all occurrences of CR and LF removed, or {@code null} if {@code o} is {@code null}
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     */
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    @SuppressWarnings({ "checkstyle:noReturnNull" })
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    public static @Nullable String removeCRLF(@Nullable Object o) {
48 1 1. removeCRLF : negated conditional → KILLED
 
        if (o == null) {
49 1 1. removeCRLF : replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED
 
            return null;
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        } else {
51 1 1. removeCRLF : replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED
 
            return removeCRLF(o.toString());
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        }
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    }
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}

Mutations

29

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFRemovesSingleCarriageReturn()] negated conditional → KILLED

30

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFIsNullSafe()] replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED

32

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFRemovesSingleCarriageReturn()] replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED

48

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFNullObjectDoesNotThrowException()] negated conditional → KILLED

49

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFNullObjectDoesNotThrowException()] replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED

51

1.1
Location : removeCRLF
Killed by : com.reallifedeveloper.common.domain.LogUtilTest.[engine:junit-jupiter]/[class:com.reallifedeveloper.common.domain.LogUtilTest]/[method:removeCRLFCallsToStringOnNonNullObject()] replaced return value with "" for com/reallifedeveloper/common/domain/LogUtil::removeCRLF → KILLED

Active mutators

Tests examined


Report generated by PIT 1.20.2