Package org.junit

Class Assert

  • public class Assert
extends java.lang.Object
    A set of assertion methods useful for writing tests. Only failed assertions are recorded. These methods can be used directly: Assert.assertEquals(...), however, they read better if they are referenced through static import: 
     import static org.junit.Assert.*;
    ...
    assertEquals(...);
    Since:
    4.0
    See Also:
    AssertionError

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected Assert()
      Protect constructor since it is a static only class

    • Method Summary

      All Methods Static Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      static void assertArrayEquals​(boolean[] expecteds, boolean[] actuals)
      Asserts that two boolean arrays are equal.
      static void assertArrayEquals​(byte[] expecteds, byte[] actuals)
      Asserts that two byte arrays are equal.
      static void assertArrayEquals​(char[] expecteds, char[] actuals)
      Asserts that two char arrays are equal.
      static void assertArrayEquals​(double[] expecteds, double[] actuals, double delta)
      Asserts that two double arrays are equal.
      static void assertArrayEquals​(float[] expecteds, float[] actuals, float delta)
      Asserts that two float arrays are equal.
      static void assertArrayEquals​(int[] expecteds, int[] actuals)
      Asserts that two int arrays are equal.
      static void assertArrayEquals​(long[] expecteds, long[] actuals)
      Asserts that two long arrays are equal.
      static void assertArrayEquals​(short[] expecteds, short[] actuals)
      Asserts that two short arrays are equal.
      static void assertArrayEquals​(java.lang.Object[] expecteds, java.lang.Object[] actuals)
      Asserts that two object arrays are equal.
      static void assertArrayEquals​(java.lang.String message, boolean[] expecteds, boolean[] actuals)
      Asserts that two boolean arrays are equal.
      static void assertArrayEquals​(java.lang.String message, byte[] expecteds, byte[] actuals)
      Asserts that two byte arrays are equal.
      static void assertArrayEquals​(java.lang.String message, char[] expecteds, char[] actuals)
      Asserts that two char arrays are equal.
      static void assertArrayEquals​(java.lang.String message, double[] expecteds, double[] actuals, double delta)
      Asserts that two double arrays are equal.
      static void assertArrayEquals​(java.lang.String message, float[] expecteds, float[] actuals, float delta)
      Asserts that two float arrays are equal.
      static void assertArrayEquals​(java.lang.String message, int[] expecteds, int[] actuals)
      Asserts that two int arrays are equal.
      static void assertArrayEquals​(java.lang.String message, long[] expecteds, long[] actuals)
      Asserts that two long arrays are equal.
      static void assertArrayEquals​(java.lang.String message, short[] expecteds, short[] actuals)
      Asserts that two short arrays are equal.
      static void assertArrayEquals​(java.lang.String message, java.lang.Object[] expecteds, java.lang.Object[] actuals)
      Asserts that two object arrays are equal.
      static void assertEquals​(double expected, double actual)
      Deprecated.
      Use assertEquals(double expected, double actual, double delta) instead
      static void assertEquals​(double expected, double actual, double delta)
      Asserts that two doubles are equal to within a positive delta.
      static void assertEquals​(float expected, float actual, float delta)
      Asserts that two floats are equal to within a positive delta.
      static void assertEquals​(long expected, long actual)
      Asserts that two longs are equal.
      static void assertEquals​(java.lang.Object[] expecteds, java.lang.Object[] actuals)
      Deprecated.
      use assertArrayEquals
      static void assertEquals​(java.lang.Object expected, java.lang.Object actual)
      Asserts that two objects are equal.
      static void assertEquals​(java.lang.String message, double expected, double actual)
      Deprecated.
      Use assertEquals(String message, double expected, double actual, double delta) instead
      static void assertEquals​(java.lang.String message, double expected, double actual, double delta)
      Asserts that two doubles are equal to within a positive delta.
      static void assertEquals​(java.lang.String message, float expected, float actual, float delta)
      Asserts that two floats are equal to within a positive delta.
      static void assertEquals​(java.lang.String message, long expected, long actual)
      Asserts that two longs are equal.
      static void assertEquals​(java.lang.String message, java.lang.Object[] expecteds, java.lang.Object[] actuals)
      Deprecated.
      use assertArrayEquals
      static void assertEquals​(java.lang.String message, java.lang.Object expected, java.lang.Object actual)
      Asserts that two objects are equal.
      static void assertFalse​(boolean condition)
      Asserts that a condition is false.
      static void assertFalse​(java.lang.String message, boolean condition)
      Asserts that a condition is false.
      static void assertNotEquals​(double unexpected, double actual, double delta)
      Asserts that two doubles are not equal to within a positive delta.
      static void assertNotEquals​(float unexpected, float actual, float delta)
      Asserts that two floats are not equal to within a positive delta.
      static void assertNotEquals​(long unexpected, long actual)
      Asserts that two longs are not equals.
      static void assertNotEquals​(java.lang.Object unexpected, java.lang.Object actual)
      Asserts that two objects are not equals.
      static void assertNotEquals​(java.lang.String message, double unexpected, double actual, double delta)
      Asserts that two doubles are not equal to within a positive delta.
      static void assertNotEquals​(java.lang.String message, float unexpected, float actual, float delta)
      Asserts that two floats are not equal to within a positive delta.
      static void assertNotEquals​(java.lang.String message, long unexpected, long actual)
      Asserts that two longs are not equals.
      static void assertNotEquals​(java.lang.String message, java.lang.Object unexpected, java.lang.Object actual)
      Asserts that two objects are not equals.
      static void assertNotNull​(java.lang.Object object)
      Asserts that an object isn't null.
      static void assertNotNull​(java.lang.String message, java.lang.Object object)
      Asserts that an object isn't null.
      static void assertNotSame​(java.lang.Object unexpected, java.lang.Object actual)
      Asserts that two objects do not refer to the same object.
      static void assertNotSame​(java.lang.String message, java.lang.Object unexpected, java.lang.Object actual)
      Asserts that two objects do not refer to the same object.
      static void assertNull​(java.lang.Object object)
      Asserts that an object is null.
      static void assertNull​(java.lang.String message, java.lang.Object object)
      Asserts that an object is null.
      static void assertSame​(java.lang.Object expected, java.lang.Object actual)
      Asserts that two objects refer to the same object.
      static void assertSame​(java.lang.String message, java.lang.Object expected, java.lang.Object actual)
      Asserts that two objects refer to the same object.
      static <T> void assertThat​(java.lang.String reason, T actual, org.hamcrest.Matcher<? super T> matcher)
      Deprecated.
      use org.hamcrest.MatcherAssert.assertThat()
      static <T> void assertThat​(T actual, org.hamcrest.Matcher<? super T> matcher)
      Deprecated.
      use org.hamcrest.MatcherAssert.assertThat()
      static <T extends java.lang.Throwable>
      T      		 assertThrows​(java.lang.Class<T> expectedThrowable, ThrowingRunnable runnable)
      Asserts that runnable throws an exception of type expectedThrowable when executed.
      static <T extends java.lang.Throwable>
      T      		 assertThrows​(java.lang.String message, java.lang.Class<T> expectedThrowable, ThrowingRunnable runnable)
      Asserts that runnable throws an exception of type expectedThrowable when executed.
      static void assertTrue​(boolean condition)
      Asserts that a condition is true.
      static void assertTrue​(java.lang.String message, boolean condition)
      Asserts that a condition is true.
      private static java.lang.String buildPrefix​(java.lang.String message)  
      private static boolean doubleIsDifferent​(double d1, double d2, double delta)  
      private static boolean equalsRegardingNull​(java.lang.Object expected, java.lang.Object actual)  
      static void fail()
      Fails a test with no message.
      static void fail​(java.lang.String message)
      Fails a test with the given message.
      private static void failEquals​(java.lang.String message, java.lang.Object actual)  
      private static void failNotEquals​(java.lang.String message, java.lang.Object expected, java.lang.Object actual)  
      private static void failNotNull​(java.lang.String message, java.lang.Object actual)  
      private static void failNotSame​(java.lang.String message, java.lang.Object expected, java.lang.Object actual)  
      private static void failSame​(java.lang.String message)  
      private static boolean floatIsDifferent​(float f1, float f2, float delta)  
      (package private) static java.lang.String format​(java.lang.String message, java.lang.Object expected, java.lang.Object actual)  
      private static java.lang.String formatClass​(java.lang.Class<?> value)  
      private static java.lang.String formatClassAndValue​(java.lang.Object value, java.lang.String valueString)  
      private static void internalArrayEquals​(java.lang.String message, java.lang.Object expecteds, java.lang.Object actuals)
      Asserts that two object arrays are equal.
      private static boolean isEquals​(java.lang.Object expected, java.lang.Object actual)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Assert

        protected Assert()
        Protect constructor since it is a static only class

    • Method Detail

      • assertTrue

        public static void assertTrue​(java.lang.String message,
                              boolean condition)
        Asserts that a condition is true. If it isn't it throws an AssertionError with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        condition - condition to be checked

      • assertTrue

        public static void assertTrue​(boolean condition)
        Asserts that a condition is true. If it isn't it throws an AssertionError without a message.
        Parameters:
        condition - condition to be checked

      • assertFalse

        public static void assertFalse​(java.lang.String message,
                               boolean condition)
        Asserts that a condition is false. If it isn't it throws an AssertionError with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        condition - condition to be checked

      • assertFalse

        public static void assertFalse​(boolean condition)
        Asserts that a condition is false. If it isn't it throws an AssertionError without a message.
        Parameters:
        condition - condition to be checked

      • fail

        public static void fail​(java.lang.String message)
        Fails a test with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        See Also:
        AssertionError

      • fail

        public static void fail()
        Fails a test with no message.

      • assertEquals

        public static void assertEquals​(java.lang.String message,
                                java.lang.Object expected,
                                java.lang.Object actual)
        Asserts that two objects are equal. If they are not, an AssertionError is thrown with the given message. If expected and actual are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expected - expected value
        actual - actual value

      • equalsRegardingNull

        private static boolean equalsRegardingNull​(java.lang.Object expected,
                                           java.lang.Object actual)

      • isEquals

        private static boolean isEquals​(java.lang.Object expected,
                                java.lang.Object actual)

      • assertEquals

        public static void assertEquals​(java.lang.Object expected,
                                java.lang.Object actual)
        Asserts that two objects are equal. If they are not, an AssertionError without a message is thrown. If expected and actual are null, they are considered equal.
        Parameters:
        expected - expected value
        actual - the value to check against expected

      • assertNotEquals

        public static void assertNotEquals​(java.lang.String message,
                                   java.lang.Object unexpected,
                                   java.lang.Object actual)
        Asserts that two objects are not equals. If they are, an AssertionError is thrown with the given message. If unexpected and actual are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        unexpected - unexpected value to check
        actual - the value to check against unexpected

      • assertNotEquals

        public static void assertNotEquals​(java.lang.Object unexpected,
                                   java.lang.Object actual)
        Asserts that two objects are not equals. If they are, an AssertionError without a message is thrown. If unexpected and actual are null, they are considered equal.
        Parameters:
        unexpected - unexpected value to check
        actual - the value to check against unexpected

      • failEquals

        private static void failEquals​(java.lang.String message,
                               java.lang.Object actual)

      • assertNotEquals

        public static void assertNotEquals​(java.lang.String message,
                                   long unexpected,
                                   long actual)
        Asserts that two longs are not equals. If they are, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        unexpected - unexpected value to check
        actual - the value to check against unexpected

      • assertNotEquals

        public static void assertNotEquals​(long unexpected,
                                   long actual)
        Asserts that two longs are not equals. If they are, an AssertionError without a message is thrown.
        Parameters:
        unexpected - unexpected value to check
        actual - the value to check against unexpected

      • assertNotEquals

        public static void assertNotEquals​(java.lang.String message,
                                   double unexpected,
                                   double actual,
                                   double delta)
        Asserts that two doubles are not equal to within a positive delta. If they are, an AssertionError is thrown with the given message. If the unexpected value is infinity then the delta value is ignored. NaNs are considered equal: assertNotEquals(Double.NaN, Double.NaN, *) fails
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        unexpected - unexpected value
        actual - the value to check against unexpected
        delta - the maximum delta between unexpected and actual for which both numbers are still considered equal.

      • assertNotEquals

        public static void assertNotEquals​(double unexpected,
                                   double actual,
                                   double delta)
        Asserts that two doubles are not equal to within a positive delta. If they are, an AssertionError is thrown. If the unexpected value is infinity then the delta value is ignored.NaNs are considered equal: assertNotEquals(Double.NaN, Double.NaN, *) fails
        Parameters:
        unexpected - unexpected value
        actual - the value to check against unexpected
        delta - the maximum delta between unexpected and actual for which both numbers are still considered equal.

      • assertNotEquals

        public static void assertNotEquals​(float unexpected,
                                   float actual,
                                   float delta)
        Asserts that two floats are not equal to within a positive delta. If they are, an AssertionError is thrown. If the unexpected value is infinity then the delta value is ignored.NaNs are considered equal: assertNotEquals(Float.NaN, Float.NaN, *) fails
        Parameters:
        unexpected - unexpected value
        actual - the value to check against unexpected
        delta - the maximum delta between unexpected and actual for which both numbers are still considered equal.

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     java.lang.Object[] expecteds,
                                     java.lang.Object[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two object arrays are equal. If they are not, an AssertionError is thrown with the given message. If expecteds and actuals are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - Object array or array of arrays (multi-dimensional array) with expected values.
        actuals - Object array or array of arrays (multi-dimensional array) with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.Object[] expecteds,
                                     java.lang.Object[] actuals)
        Asserts that two object arrays are equal. If they are not, an AssertionError is thrown. If expected and actual are null, they are considered equal.
        Parameters:
        expecteds - Object array or array of arrays (multi-dimensional array) with expected values
        actuals - Object array or array of arrays (multi-dimensional array) with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     boolean[] expecteds,
                                     boolean[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two boolean arrays are equal. If they are not, an AssertionError is thrown with the given message. If expecteds and actuals are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - boolean array with expected values.
        actuals - boolean array with expected values.
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(boolean[] expecteds,
                                     boolean[] actuals)
        Asserts that two boolean arrays are equal. If they are not, an AssertionError is thrown. If expected and actual are null, they are considered equal.
        Parameters:
        expecteds - boolean array with expected values.
        actuals - boolean array with expected values.

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     byte[] expecteds,
                                     byte[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two byte arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - byte array with expected values.
        actuals - byte array with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(byte[] expecteds,
                                     byte[] actuals)
        Asserts that two byte arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - byte array with expected values.
        actuals - byte array with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     char[] expecteds,
                                     char[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two char arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - char array with expected values.
        actuals - char array with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(char[] expecteds,
                                     char[] actuals)
        Asserts that two char arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - char array with expected values.
        actuals - char array with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     short[] expecteds,
                                     short[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two short arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - short array with expected values.
        actuals - short array with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(short[] expecteds,
                                     short[] actuals)
        Asserts that two short arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - short array with expected values.
        actuals - short array with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     int[] expecteds,
                                     int[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two int arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - int array with expected values.
        actuals - int array with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(int[] expecteds,
                                     int[] actuals)
        Asserts that two int arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - int array with expected values.
        actuals - int array with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     long[] expecteds,
                                     long[] actuals)
                              throws ArrayComparisonFailure
        Asserts that two long arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - long array with expected values.
        actuals - long array with actual values
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(long[] expecteds,
                                     long[] actuals)
        Asserts that two long arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - long array with expected values.
        actuals - long array with actual values

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     double[] expecteds,
                                     double[] actuals,
                                     double delta)
                              throws ArrayComparisonFailure
        Asserts that two double arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - double array with expected values.
        actuals - double array with actual values
        delta - the maximum delta between expecteds[i] and actuals[i] for which both numbers are still considered equal.
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(double[] expecteds,
                                     double[] actuals,
                                     double delta)
        Asserts that two double arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - double array with expected values.
        actuals - double array with actual values
        delta - the maximum delta between expecteds[i] and actuals[i] for which both numbers are still considered equal.

      • assertArrayEquals

        public static void assertArrayEquals​(java.lang.String message,
                                     float[] expecteds,
                                     float[] actuals,
                                     float delta)
                              throws ArrayComparisonFailure
        Asserts that two float arrays are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - float array with expected values.
        actuals - float array with actual values
        delta - the maximum delta between expecteds[i] and actuals[i] for which both numbers are still considered equal.
        Throws:
        ArrayComparisonFailure

      • assertArrayEquals

        public static void assertArrayEquals​(float[] expecteds,
                                     float[] actuals,
                                     float delta)
        Asserts that two float arrays are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expecteds - float array with expected values.
        actuals - float array with actual values
        delta - the maximum delta between expecteds[i] and actuals[i] for which both numbers are still considered equal.

      • internalArrayEquals

        private static void internalArrayEquals​(java.lang.String message,
                                        java.lang.Object expecteds,
                                        java.lang.Object actuals)
                                 throws ArrayComparisonFailure
        Asserts that two object arrays are equal. If they are not, an AssertionError is thrown with the given message. If expecteds and actuals are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - Object array or array of arrays (multi-dimensional array) with expected values.
        actuals - Object array or array of arrays (multi-dimensional array) with actual values
        Throws:
        ArrayComparisonFailure

      • assertEquals

        public static void assertEquals​(java.lang.String message,
                                double expected,
                                double actual,
                                double delta)
        Asserts that two doubles are equal to within a positive delta. If they are not, an AssertionError is thrown with the given message. If the expected value is infinity then the delta value is ignored. NaNs are considered equal: assertEquals(Double.NaN, Double.NaN, *) passes
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expected - expected value
        actual - the value to check against expected
        delta - the maximum delta between expected and actual for which both numbers are still considered equal.

      • assertEquals

        public static void assertEquals​(java.lang.String message,
                                float expected,
                                float actual,
                                float delta)
        Asserts that two floats are equal to within a positive delta. If they are not, an AssertionError is thrown with the given message. If the expected value is infinity then the delta value is ignored. NaNs are considered equal: assertEquals(Float.NaN, Float.NaN, *) passes
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expected - expected value
        actual - the value to check against expected
        delta - the maximum delta between expected and actual for which both numbers are still considered equal.

      • assertNotEquals

        public static void assertNotEquals​(java.lang.String message,
                                   float unexpected,
                                   float actual,
                                   float delta)
        Asserts that two floats are not equal to within a positive delta. If they are, an AssertionError is thrown with the given message. If the unexpected value is infinity then the delta value is ignored. NaNs are considered equal: assertNotEquals(Float.NaN, Float.NaN, *) fails
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        unexpected - unexpected value
        actual - the value to check against unexpected
        delta - the maximum delta between unexpected and actual for which both numbers are still considered equal.

      • doubleIsDifferent

        private static boolean doubleIsDifferent​(double d1,
                                         double d2,
                                         double delta)

      • floatIsDifferent

        private static boolean floatIsDifferent​(float f1,
                                        float f2,
                                        float delta)

      • assertEquals

        public static void assertEquals​(long expected,
                                long actual)
        Asserts that two longs are equal. If they are not, an AssertionError is thrown.
        Parameters:
        expected - expected long value.
        actual - actual long value

      • assertEquals

        public static void assertEquals​(java.lang.String message,
                                long expected,
                                long actual)
        Asserts that two longs are equal. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expected - long expected value.
        actual - long actual value

      • assertEquals

        @Deprecated
public static void assertEquals​(double expected,
                                double actual)
        Deprecated.
        Use assertEquals(double expected, double actual, double delta) instead

      • assertEquals

        @Deprecated
public static void assertEquals​(java.lang.String message,
                                double expected,
                                double actual)
        Deprecated.
        Use assertEquals(String message, double expected, double actual, double delta) instead

      • assertEquals

        public static void assertEquals​(double expected,
                                double actual,
                                double delta)
        Asserts that two doubles are equal to within a positive delta. If they are not, an AssertionError is thrown. If the expected value is infinity then the delta value is ignored.NaNs are considered equal: assertEquals(Double.NaN, Double.NaN, *) passes
        Parameters:
        expected - expected value
        actual - the value to check against expected
        delta - the maximum delta between expected and actual for which both numbers are still considered equal.

      • assertEquals

        public static void assertEquals​(float expected,
                                float actual,
                                float delta)
        Asserts that two floats are equal to within a positive delta. If they are not, an AssertionError is thrown. If the expected value is infinity then the delta value is ignored. NaNs are considered equal: assertEquals(Float.NaN, Float.NaN, *) passes
        Parameters:
        expected - expected value
        actual - the value to check against expected
        delta - the maximum delta between expected and actual for which both numbers are still considered equal.

      • assertNotNull

        public static void assertNotNull​(java.lang.String message,
                                 java.lang.Object object)
        Asserts that an object isn't null. If it is an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        object - Object to check or null

      • assertNotNull

        public static void assertNotNull​(java.lang.Object object)
        Asserts that an object isn't null. If it is an AssertionError is thrown.
        Parameters:
        object - Object to check or null

      • assertNull

        public static void assertNull​(java.lang.String message,
                              java.lang.Object object)
        Asserts that an object is null. If it is not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        object - Object to check or null

      • assertNull

        public static void assertNull​(java.lang.Object object)
        Asserts that an object is null. If it isn't an AssertionError is thrown.
        Parameters:
        object - Object to check or null

      • failNotNull

        private static void failNotNull​(java.lang.String message,
                                java.lang.Object actual)

      • assertSame

        public static void assertSame​(java.lang.String message,
                              java.lang.Object expected,
                              java.lang.Object actual)
        Asserts that two objects refer to the same object. If they are not, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expected - the expected object
        actual - the object to compare to expected

      • assertSame

        public static void assertSame​(java.lang.Object expected,
                              java.lang.Object actual)
        Asserts that two objects refer to the same object. If they are not the same, an AssertionError without a message is thrown.
        Parameters:
        expected - the expected object
        actual - the object to compare to expected

      • assertNotSame

        public static void assertNotSame​(java.lang.String message,
                                 java.lang.Object unexpected,
                                 java.lang.Object actual)
        Asserts that two objects do not refer to the same object. If they do refer to the same object, an AssertionError is thrown with the given message.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        unexpected - the object you don't expect
        actual - the object to compare to unexpected

      • assertNotSame

        public static void assertNotSame​(java.lang.Object unexpected,
                                 java.lang.Object actual)
        Asserts that two objects do not refer to the same object. If they do refer to the same object, an AssertionError without a message is thrown.
        Parameters:
        unexpected - the object you don't expect
        actual - the object to compare to unexpected

      • failSame

        private static void failSame​(java.lang.String message)

      • failNotSame

        private static void failNotSame​(java.lang.String message,
                                java.lang.Object expected,
                                java.lang.Object actual)

      • failNotEquals

        private static void failNotEquals​(java.lang.String message,
                                  java.lang.Object expected,
                                  java.lang.Object actual)

      • format

        static java.lang.String format​(java.lang.String message,
                               java.lang.Object expected,
                               java.lang.Object actual)

      • formatClass

        private static java.lang.String formatClass​(java.lang.Class<?> value)

      • formatClassAndValue

        private static java.lang.String formatClassAndValue​(java.lang.Object value,
                                                    java.lang.String valueString)

      • assertEquals

        @Deprecated
public static void assertEquals​(java.lang.String message,
                                java.lang.Object[] expecteds,
                                java.lang.Object[] actuals)
        Deprecated.
        use assertArrayEquals
        Asserts that two object arrays are equal. If they are not, an AssertionError is thrown with the given message. If expecteds and actuals are null, they are considered equal.
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expecteds - Object array or array of arrays (multi-dimensional array) with expected values.
        actuals - Object array or array of arrays (multi-dimensional array) with actual values

      • assertEquals

        @Deprecated
public static void assertEquals​(java.lang.Object[] expecteds,
                                java.lang.Object[] actuals)
        Deprecated.
        use assertArrayEquals
        Asserts that two object arrays are equal. If they are not, an AssertionError is thrown. If expected and actual are null, they are considered equal.
        Parameters:
        expecteds - Object array or array of arrays (multi-dimensional array) with expected values
        actuals - Object array or array of arrays (multi-dimensional array) with actual values

      • assertThat

        @Deprecated
public static <T> void assertThat​(T actual,
                                  org.hamcrest.Matcher<? super T> matcher)
        Deprecated.
        use org.hamcrest.MatcherAssert.assertThat()
        Asserts that actual satisfies the condition specified by matcher. If not, an AssertionError is thrown with information about the matcher and failing value. Example: 
           assertThat(0, is(1)); // fails:
     // failure message:
     // expected: is <1>
     // got value: <0>
   assertThat(0, is(not(1))) // passes
        org.hamcrest.Matcher does not currently document the meaning of its type parameter T. This method assumes that a matcher typed as Matcher<T> can be meaningfully applied only to values that could be assigned to a variable of type T.
        Type Parameters:
        T - the static type accepted by the matcher (this can flag obvious compile-time problems such as assertThat(1, is("a"))
        Parameters:
        actual - the computed value being compared
        matcher - an expression, built of Matchers, specifying allowed values
        See Also:
        CoreMatchers

      • assertThat

        @Deprecated
public static <T> void assertThat​(java.lang.String reason,
                                  T actual,
                                  org.hamcrest.Matcher<? super T> matcher)
        Deprecated.
        use org.hamcrest.MatcherAssert.assertThat()
        Asserts that actual satisfies the condition specified by matcher. If not, an AssertionError is thrown with the reason and information about the matcher and failing value. Example: 
           assertThat("Help! Integers don't work", 0, is(1)); // fails:
     // failure message:
     // Help! Integers don't work
     // expected: is <1>
     // got value: <0>
   assertThat("Zero is one", 0, is(not(1))) // passes
        org.hamcrest.Matcher does not currently document the meaning of its type parameter T. This method assumes that a matcher typed as Matcher<T> can be meaningfully applied only to values that could be assigned to a variable of type T.
        Type Parameters:
        T - the static type accepted by the matcher (this can flag obvious compile-time problems such as assertThat(1, is("a"))
        Parameters:
        reason - additional information about the error
        actual - the computed value being compared
        matcher - an expression, built of Matchers, specifying allowed values
        See Also:
        CoreMatchers

      • assertThrows

        public static <T extends java.lang.Throwable> T assertThrows​(java.lang.Class<T> expectedThrowable,
                                                             ThrowingRunnable runnable)
        Asserts that runnable throws an exception of type expectedThrowable when executed. If it does, the exception object is returned. If it does not throw an exception, an AssertionError is thrown. If it throws the wrong type of exception, an AssertionError is thrown describing the mismatch; the exception that was actually thrown can be obtained by calling Throwable.getCause().
        Parameters:
        expectedThrowable - the expected type of the exception
        runnable - a function that is expected to throw an exception when executed
        Returns:
        the exception thrown by runnable
        Since:
        4.13

      • assertThrows

        public static <T extends java.lang.Throwable> T assertThrows​(java.lang.String message,
                                                             java.lang.Class<T> expectedThrowable,
                                                             ThrowingRunnable runnable)
        Asserts that runnable throws an exception of type expectedThrowable when executed. If it does, the exception object is returned. If it does not throw an exception, an AssertionError is thrown. If it throws the wrong type of exception, an AssertionError is thrown describing the mismatch; the exception that was actually thrown can be obtained by calling Throwable.getCause().
        Parameters:
        message - the identifying message for the AssertionError (null okay)
        expectedThrowable - the expected type of the exception
        runnable - a function that is expected to throw an exception when executed
        Returns:
        the exception thrown by runnable
        Since:
        4.13

      • buildPrefix

        private static java.lang.String buildPrefix​(java.lang.String message)