GH-1050 - ModuleContextCustomizer are now considered equal if their backing execution is.

spring-modulith-test/src/test/java/example/module/SampleTestA.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2025 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.module;
+
+import org.springframework.modulith.test.ApplicationModuleTest;
+
+/**
+ * @author Oliver Drotbohm
+ */
+@ApplicationModuleTest
+public class SampleTestA {
+
+}

spring-modulith-test/src/test/java/example/module/SampleTestB.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2025 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.module;
+
+import org.springframework.modulith.test.ApplicationModuleTest;
+
+/**
+ * @author Oliver Drotbohm
+ */
+@ApplicationModuleTest
+public class SampleTestB {}

spring-modulith-test/src/test/java/org/springframework/modulith/test/ModuleContextCustomizerUnitTests.java

@@ -18,6 +18,7 @@ package org.springframework.modulith.test;
 import static org.assertj.core.api.Assertions.*;
 
 import example.module.SampleTestA;
+import example.module.SampleTestB;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.modulith.core.ApplicationModule;
@@ -34,8 +35,8 @@ class ModuleContextCustomizerUnitTests {
 	@Test
 	void instancesForSameTargetTypeAreEqual() {
 
-		var left = new ModuleContextCustomizer(Object.class);
-		var right = new ModuleContextCustomizer(Object.class);
+		var left = new ModuleContextCustomizer(SampleTestA.class);
+		var right = new ModuleContextCustomizer(SampleTestA.class);
 
 		assertThat(left).isEqualTo(right);
 		assertThat(right).isEqualTo(left);
@@ -53,4 +54,15 @@ class ModuleContextCustomizerUnitTests {
 				.extracting(ApplicationModuleIdentifier::toString)
 				.isEqualTo("module");
 	}
+
+	@Test // GH-1050
+	void instancesWithSameModuleSetupAreConsideredEqual() {
+
+		var left = new ModuleContextCustomizer(SampleTestA.class);
+		var right = new ModuleContextCustomizer(SampleTestB.class);
+
+		assertThat(left).isEqualTo(right);
+		assertThat(right).isEqualTo(left);
+		assertThat(left).hasSameHashCodeAs(right);
+	}
 }

spring-modulith-test/src/test/resources/META-INF/spring.factories

@@ -0,0 +1 @@
+org.springframework.modulith.core.ApplicationModulesFactory=org.springframework.modulith.test.TestApplicationModules.Factory