Upgrade to AssertJ 3.26.0

Closes gh-41401

gradle.properties

@@ -5,7 +5,7 @@ org.gradle.caching=true
 org.gradle.parallel=true
 org.gradle.jvmargs=-Xmx2g -Dfile.encoding=UTF-8
 
-assertjVersion=3.25.3
+assertjVersion=3.26.0
 commonsCodecVersion=1.16.1
 graalVersion=22.3
 hamcrestVersion=2.2

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/PropertyMapperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,7 +57,7 @@ class PropertyMapperTests {
 
 	@Test
 	void fromValueAlwaysApplyingWhenNonNullShouldAlwaysApplyNonNullToSource() {
-		this.map.alwaysApplyingWhenNonNull().from((String) null).toCall(() -> fail(null));
+		this.map.alwaysApplyingWhenNonNull().from((String) null).toCall(() -> fail());
 	}
 
 	@Test
@@ -101,14 +101,14 @@ class PropertyMapperTests {
 
 	@Test
 	void whenNonNullWhenSuppliedNullShouldNotMap() {
-		this.map.from(() -> null).whenNonNull().as(String::valueOf).toCall(() -> fail(null));
+		this.map.from(() -> null).whenNonNull().as(String::valueOf).toCall(() -> fail());
 	}
 
 	@Test
 	void whenNonNullWhenSuppliedThrowsNullPointerExceptionShouldNotMap() {
 		this.map.from(() -> {
 			throw new NullPointerException();
-		}).whenNonNull().as(String::valueOf).toCall(() -> fail(null));
+		}).whenNonNull().as(String::valueOf).toCall(() -> fail());
 	}
 
 	@Test
@@ -119,7 +119,7 @@ class PropertyMapperTests {
 
 	@Test
 	void whenTrueWhenValueIsFalseShouldNotMap() {
-		this.map.from(false).whenTrue().toCall(() -> fail(null));
+		this.map.from(false).whenTrue().toCall(() -> fail());
 	}
 
 	@Test
@@ -130,17 +130,17 @@ class PropertyMapperTests {
 
 	@Test
 	void whenFalseWhenValueIsTrueShouldNotMap() {
-		this.map.from(true).whenFalse().toCall(() -> fail(null));
+		this.map.from(true).whenFalse().toCall(() -> fail());
 	}
 
 	@Test
 	void whenHasTextWhenValueIsNullShouldNotMap() {
-		this.map.from(() -> null).whenHasText().toCall(() -> fail(null));
+		this.map.from(() -> null).whenHasText().toCall(() -> fail());
 	}
 
 	@Test
 	void whenHasTextWhenValueIsEmptyShouldNotMap() {
-		this.map.from("").whenHasText().toCall(() -> fail(null));
+		this.map.from("").whenHasText().toCall(() -> fail());
 	}
 
 	@Test
@@ -157,7 +157,7 @@ class PropertyMapperTests {
 
 	@Test
 	void whenEqualToWhenValueIsNotEqualShouldNotMatch() {
-		this.map.from("123").whenEqualTo("321").toCall(() -> fail(null));
+		this.map.from("123").whenEqualTo("321").toCall(() -> fail());
 	}
 
 	@Test
@@ -169,7 +169,7 @@ class PropertyMapperTests {
 	@Test
 	void whenInstanceOfWhenValueIsNotTargetTypeShouldNotMatch() {
 		Supplier<Number> supplier = () -> 123L;
-		this.map.from(supplier).whenInstanceOf(Double.class).toCall(() -> fail(null));
+		this.map.from(supplier).whenInstanceOf(Double.class).toCall(() -> fail());
 	}
 
 	@Test
@@ -180,7 +180,7 @@ class PropertyMapperTests {
 
 	@Test
 	void whenWhenValueDoesNotMatchShouldNotMap() {
-		this.map.from("123").when("321"::equals).toCall(() -> fail(null));
+		this.map.from("123").when("321"::equals).toCall(() -> fail());
 	}
 
 	@Test
@@ -198,12 +198,12 @@ class PropertyMapperTests {
 
 	@Test
 	void alwaysApplyingWhenNonNullShouldAlwaysApplyNonNullToSource() {
-		this.map.alwaysApplyingWhenNonNull().from(() -> null).toCall(() -> fail(null));
+		this.map.alwaysApplyingWhenNonNull().from(() -> null).toCall(() -> fail());
 	}
 
 	@Test
 	void whenWhenValueNotMatchesShouldSupportChainedCalls() {
-		this.map.from("123").when("456"::equals).when("123"::equals).toCall(() -> fail(null));
+		this.map.from("123").when("456"::equals).when("123"::equals).toCall(() -> fail());
 	}
 
 	@Test