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How to use smartErrorMessage method of org.assertj.core.error.ShouldBeEqual class

Best Assertj code snippet using org.assertj.core.error.ShouldBeEqual.smartErrorMessage

Source:ShouldBeEqual.java

...103   * @return the created {@code AssertionError}.104   */105  @Override106  public AssertionError newAssertionError(Description description, Representation representation) {107    String message = smartErrorMessage(description, representation);108    // only use JUnit error message if the comparison strategy used was standard, otherwise we need to mention109    // comparison strategy in the assertion error message to make it clear to the user it was used.110    if (comparisonStrategy.isStandard() && !actualAndExpectedHaveSameStringRepresentation()) {111      // comparison strategy is standard -> try to build an AssertionFailedError used in JUnit 5 that is nicely displayed in IDEs112      AssertionError assertionFailedError = assertionFailedError(message, representation);113      // assertionFailedError != null means that JUnit 5 and opentest4j are in the classpath114      if (assertionFailedError != null) return assertionFailedError;115      // Junit5 was not used, try to build a JUnit 4 ComparisonFailure that is nicely displayed in IDEs116      AssertionError error = comparisonFailure(description);117      // error != null means that JUnit 4 was in the classpath and we build a ComparisonFailure.118      if (error != null) return error;119    }120    AssertionError assertionFailedError = assertionFailedError(message, representation);121    // assertionFailedError != null means that JUnit 5 and opentest4j was in the classpath122    if (assertionFailedError != null) return assertionFailedError;123    // No JUnit in the classpath => fall back to default error message124    return Failures.instance().failure(message);125  }126  protected boolean actualAndExpectedHaveSameStringRepresentation() {127    return Objects.equals(representation.toStringOf(actual), representation.toStringOf(expected));128  }129  /**130   * Builds and returns an error message from the given description using {@link #expected} and {@link #actual} basic131   * representation if their description differ otherwise use132   * {@link #defaultDetailedErrorMessage(Description, Representation)} to represent them differently.133   *134   * @param description the {@link Description} used to build the returned error message135   * @param representation the {@link org.assertj.core.presentation.Representation} used to build String representation136   *          of object137   * @return the error message from description using {@link #expected} and {@link #actual} "smart" representation.138   */139  protected String smartErrorMessage(Description description, Representation representation) {140    if (actualAndExpectedHaveSameStringRepresentation()) {141      // This happens for example when actual = 42f and expected = 42d, which will give this error:142      // actual : "42" and expected : "42".143      // JUnit 4 manages this case even worst, it will output something like :144      // "java.lang.String expected:java.lang.String<42.0> but was: java.lang.String<42.0>"145      // which makes things even more confusing since we lost the fact that 42 was a float or a double.146      // It is therefore better to built our own description without using ComparisonFailure, the147      // only drawback is that it won't look nice in IDEs.148      return defaultDetailedErrorMessage(description, representation);149    }150    return comparisonStrategy.isStandard()151        ? messageFormatter.format(description, representation, EXPECTED_BUT_WAS_MESSAGE, actual, expected)152        : messageFormatter.format(description, representation, EXPECTED_BUT_WAS_MESSAGE_USING_COMPARATOR,153                                  actual, expected, comparisonStrategy);...

smartErrorMessage

Using AI Code Generation

1  Object actual = 1;2  Object expected = 2;3  AssertionError assertionError = expectAssertionError(() -> assertThat(actual).isEqualTo(expected));4  String errorMessage = smartErrorMessage(assertionError);5  assertThat(errorMessage).isEqualTo("expected:<2> but was:<1>");6  Object actual = 1;7  Object expected = 2;8  AssertionError assertionError = expectAssertionError(() -> assertThat(actual).isEqualTo(expected));9  String errorMessage = smartErrorMessage(assertionError);10  assertThat(errorMessage).isEqualTo("expected:<2> but was:<1>");

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