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Introduce AssertionFailureBuilder (#2972)
Resolves #2967.
1 parent 08b102c commit e91e5dc

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‎documentation/src/docs/asciidoc/release-notes/index.adoc‎

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@@ -16,6 +16,8 @@ authors as well as build tool and IDE vendors.
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include::{includedir}/link-attributes.adoc[]
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include::{basedir}/release-notes-5.9.0.adoc[]
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include::{basedir}/release-notes-5.9.0-RC1.adoc[]
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include::{basedir}/release-notes-5.9.0-M1.adoc[]

‎documentation/src/docs/asciidoc/release-notes/release-notes-5.9.0.adoc‎

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[[release-notes-5.9.0]]
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== 5.9.0
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*Date of Release:* ❓
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*Scope:* ❓
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For a complete list of all _closed_ issues and pull requests for this release, consult the
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link:{junit5-repo}+/milestone/62?closed=1+[5.9.0] milestone page in the JUnit repository on
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GitHub.
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[[release-notes-5.9.0-junit-platform]]
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=== JUnit Platform
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==== Bug Fixes
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* ❓
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==== Deprecations and Breaking Changes
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* ❓
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==== New Features and Improvements
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* ❓
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[[release-notes-5.9.0-junit-jupiter]]
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=== JUnit Jupiter
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==== Bug Fixes
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* ❓
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==== Deprecations and Breaking Changes
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* ❓
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==== New Features and Improvements
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* `AssertionFailureBuilder` allows reusing Jupiter's logic for creating failure messages
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to assist in writing custom assertion methods.
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[[release-notes-5.9.0-junit-vintage]]
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=== JUnit Vintage
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==== Bug Fixes
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* ❓
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==== Deprecations and Breaking Changes
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* ❓
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==== New Features and Improvements
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* ❓

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertArrayEquals.java‎

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@@ -10,11 +10,8 @@
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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
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import static org.junit.jupiter.api.AssertionUtils.fail;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import static org.junit.jupiter.api.AssertionUtils.formatIndexes;
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import static org.junit.jupiter.api.AssertionUtils.formatValues;
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import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
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import static org.junit.platform.commons.util.ReflectionUtils.isArray;
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import java.util.ArrayDeque;
@@ -406,30 +403,41 @@ private static void assertArraysNotNull(Object expected, Object actual, Deque<In
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}
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private static void failExpectedArrayIsNull(Deque<Integer> indexes, Object messageOrSupplier) {
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fail(buildPrefix(nullSafeGet(messageOrSupplier)) + "expected array was <null>" + formatIndexes(indexes));
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assertionFailure() //
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.message(messageOrSupplier) //
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.reason("expected array was <null>" + formatIndexes(indexes)) //
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.buildAndThrow();
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}
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private static void failActualArrayIsNull(Deque<Integer> indexes, Object messageOrSupplier) {
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fail(buildPrefix(nullSafeGet(messageOrSupplier)) + "actual array was <null>" + formatIndexes(indexes));
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assertionFailure() //
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.message(messageOrSupplier) //
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.reason("actual array was <null>" + formatIndexes(indexes)) //
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.buildAndThrow();
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}
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private static void assertArraysHaveSameLength(int expected, int actual, Deque<Integer> indexes,
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Object messageOrSupplier) {
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if (expected != actual) {
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String prefix = buildPrefix(nullSafeGet(messageOrSupplier));
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String message = "array lengths differ" + formatIndexes(indexes) + ", expected: <" + expected
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+ "> but was: <" + actual + ">";
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fail(prefix + message);
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assertionFailure() //
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.message(messageOrSupplier) //
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.reason("array lengths differ" + formatIndexes(indexes)) //
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.expected(expected) //
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.actual(actual) //
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.buildAndThrow();
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}
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}
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private static void failArraysNotEqual(Object expected, Object actual, Deque<Integer> indexes,
428433
Object messageOrSupplier) {
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430-
String prefix = buildPrefix(nullSafeGet(messageOrSupplier));
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String message = "array contents differ" + formatIndexes(indexes) + ", " + formatValues(expected, actual);
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fail(prefix + message);
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assertionFailure() //
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.message(messageOrSupplier) //
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.reason("array contents differ" + formatIndexes(indexes)) //
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.expected(expected) //
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.actual(actual) //
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.buildAndThrow();
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}
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private static Deque<Integer> nullSafeIndexes(Deque<Integer> indexes, int newIndex) {

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertDoesNotThrow.java‎

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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
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import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import java.util.function.Supplier;
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@@ -78,9 +77,11 @@ private static <T> T assertDoesNotThrow(ThrowingSupplier<T> supplier, Object mes
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}
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private static AssertionFailedError createAssertionFailedError(Object messageOrSupplier, Throwable t) {
81-
String message = buildPrefix(nullSafeGet(messageOrSupplier)) + "Unexpected exception thrown: "
82-
+ t.getClass().getName() + buildSuffix(t.getMessage());
83-
return new AssertionFailedError(message, t);
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return assertionFailure() //
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.message(messageOrSupplier) //
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.reason("Unexpected exception thrown: " + t.getClass().getName() + buildSuffix(t.getMessage())) //
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.cause(t) //
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.build();
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}
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private static String buildSuffix(String message) {

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertEquals.java‎

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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import static org.junit.jupiter.api.AssertionUtils.doublesAreEqual;
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import static org.junit.jupiter.api.AssertionUtils.failNotEqual;
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import static org.junit.jupiter.api.AssertionUtils.floatsAreEqual;
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import static org.junit.jupiter.api.AssertionUtils.objectsAreEqual;
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@@ -189,4 +189,11 @@ static void assertEquals(Object expected, Object actual, Supplier<String> messag
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}
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}
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private static void failNotEqual(Object expected, Object actual, Object messageOrSupplier) {
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assertionFailure() //
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.message(messageOrSupplier) //
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.expected(expected) //
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.actual(actual) //
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.buildAndThrow();
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}
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}

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertFalse.java‎

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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
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import static org.junit.jupiter.api.AssertionUtils.fail;
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import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import java.util.function.BooleanSupplier;
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import java.util.function.Supplier;
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*/
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class AssertFalse {
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private static final String EXPECTED_FALSE = "expected: <false> but was: <true>";
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private AssertFalse() {
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/* no-op */
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}
@@ -37,13 +33,13 @@ static void assertFalse(boolean condition) {
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static void assertFalse(boolean condition, String message) {
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if (condition) {
40-
fail(buildPrefix(message) + EXPECTED_FALSE, false, true);
36+
failNotFalse(message);
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}
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}
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static void assertFalse(boolean condition, Supplier<String> messageSupplier) {
4541
if (condition) {
46-
fail(buildPrefix(nullSafeGet(messageSupplier)) + EXPECTED_FALSE, false, true);
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failNotFalse(messageSupplier);
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}
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}
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@@ -59,4 +55,12 @@ static void assertFalse(BooleanSupplier booleanSupplier, Supplier<String> messag
5955
assertFalse(booleanSupplier.getAsBoolean(), messageSupplier);
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}
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58+
private static void failNotFalse(Object messageOrSupplier) {
59+
assertionFailure() //
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.message(messageOrSupplier) //
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.expected(false) //
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.actual(true) //
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.buildAndThrow();
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}
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}

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertInstanceOf.java‎

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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
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import static org.junit.jupiter.api.AssertionUtils.format;
15-
import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import java.util.function.Supplier;
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import org.opentest4j.AssertionFailedError;
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/**
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* {@code AssertInstanceOf} is a collection of utility methods that support
2319
* asserting that an object is of an expected type &mdash; in other words, if it
@@ -45,10 +41,12 @@ static <T> T assertInstanceOf(Class<T> expectedType, Object actualValue, Supplie
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private static <T> T assertInstanceOf(Class<T> expectedType, Object actualValue, Object messageOrSupplier) {
4743
if (!expectedType.isInstance(actualValue)) {
48-
String reason = (actualValue == null ? "Unexpected null value" : "Unexpected type");
49-
String message = buildPrefix(nullSafeGet(messageOrSupplier))
50-
+ format(expectedType, actualValue == null ? null : actualValue.getClass(), reason);
51-
throw new AssertionFailedError(message);
44+
assertionFailure() //
45+
.message(messageOrSupplier) //
46+
.reason(actualValue == null ? "Unexpected null value" : "Unexpected type") //
47+
.expected(expectedType) //
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.actual(actualValue == null ? null : actualValue.getClass()) //
49+
.buildAndThrow();
5250
}
5351
return expectedType.cast(actualValue);
5452
}

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertIterableEquals.java‎

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package org.junit.jupiter.api;
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import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
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import static org.junit.jupiter.api.AssertionUtils.fail;
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import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
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import static org.junit.jupiter.api.AssertionUtils.formatIndexes;
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import static org.junit.jupiter.api.AssertionUtils.formatValues;
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import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
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import java.util.ArrayDeque;
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import java.util.Deque;
@@ -139,11 +136,17 @@ private static void assertIterablesNotNull(Object expected, Object actual, Deque
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}
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141138
private static void failExpectedIterableIsNull(Deque<Integer> indexes, Object messageOrSupplier) {
142-
fail(buildPrefix(nullSafeGet(messageOrSupplier)) + "expected iterable was <null>" + formatIndexes(indexes));
139+
assertionFailure() //
140+
.message(messageOrSupplier) //
141+
.reason("expected iterable was <null>" + formatIndexes(indexes)) //
142+
.buildAndThrow();
143143
}
144144

145145
private static void failActualIterableIsNull(Deque<Integer> indexes, Object messageOrSupplier) {
146-
fail(buildPrefix(nullSafeGet(messageOrSupplier)) + "actual iterable was <null>" + formatIndexes(indexes));
146+
assertionFailure() //
147+
.message(messageOrSupplier) //
148+
.reason("actual iterable was <null>" + formatIndexes(indexes)) //
149+
.buildAndThrow();
147150
}
148151

149152
private static void assertIteratorsAreEmpty(Iterator<?> expected, Iterator<?> actual, int processed,
@@ -156,19 +159,24 @@ private static void assertIteratorsAreEmpty(Iterator<?> expected, Iterator<?> ac
156159
AtomicInteger actualCount = new AtomicInteger(processed);
157160
actual.forEachRemaining(e -> actualCount.incrementAndGet());
158161

159-
String prefix = buildPrefix(nullSafeGet(messageOrSupplier));
160-
String message = "iterable lengths differ" + formatIndexes(indexes) + ", expected: <" + expectedCount.get()
161-
+ "> but was: <" + actualCount.get() + ">";
162-
fail(prefix + message);
162+
assertionFailure() //
163+
.message(messageOrSupplier) //
164+
.reason("iterable lengths differ" + formatIndexes(indexes)) //
165+
.expected(expectedCount.get()) //
166+
.actual(actualCount.get()) //
167+
.buildAndThrow();
163168
}
164169
}
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166171
private static void failIterablesNotEqual(Object expected, Object actual, Deque<Integer> indexes,
167172
Object messageOrSupplier) {
168173

169-
String prefix = buildPrefix(nullSafeGet(messageOrSupplier));
170-
String message = "iterable contents differ" + formatIndexes(indexes) + ", " + formatValues(expected, actual);
171-
fail(prefix + message);
174+
assertionFailure() //
175+
.message(messageOrSupplier) //
176+
.reason("iterable contents differ" + formatIndexes(indexes)) //
177+
.expected(expected) //
178+
.actual(actual) //
179+
.buildAndThrow();
172180
}
173181

174182
private final static class Pair {

‎junit-jupiter-api/src/main/java/org/junit/jupiter/api/AssertLinesMatch.java‎

Lines changed: 8 additions & 4 deletions
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@@ -12,8 +12,7 @@
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1313
import static java.lang.String.format;
1414
import static java.lang.String.join;
15-
import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
16-
import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;
15+
import static org.junit.jupiter.api.AssertionFailureBuilder.assertionFailure;
1716
import static org.junit.platform.commons.util.Preconditions.condition;
1817
import static org.junit.platform.commons.util.Preconditions.notNull;
1918

@@ -195,8 +194,13 @@ String snippet(String line) {
195194

196195
void fail(String format, Object... args) {
197196
String newLine = System.lineSeparator();
198-
String message = buildPrefix(nullSafeGet(messageOrSupplier)) + format(format, args);
199-
AssertionUtils.fail(message, join(newLine, expectedLines), join(newLine, actualLines));
197+
assertionFailure() //
198+
.message(messageOrSupplier) //
199+
.reason(format(format, args)) //
200+
.expected(join(newLine, expectedLines)) //
201+
.actual(join(newLine, actualLines)) //
202+
.includeValuesInMessage(false) //
203+
.buildAndThrow();
200204
}
201205
}
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