Merge pull request #42277 from quaff

* pr/42277:
  Add tests to ensure private constructor is not used for binding

Closes gh-42277

Author: philwebb

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/DefaultBindConstructorProviderTests.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.
@@ -33,6 +33,7 @@
  *
  * @author Phillip Webb
  * @author Madhura Bhave
+ * @author Yanming Zhou
  */
 class DefaultBindConstructorProviderTests {
 
@@ -92,6 +93,12 @@ void getBindConstructorWhenHasTwoConstructorsWithBothConstructorBindingThrowsExc
 			.withMessageContaining("has more than one @ConstructorBinding");
 	}
 
+	@Test
+	void getBindConstructorWhenIsTypeWithPrivateConstructorReturnsNull() {
+		Constructor<?> constructor = this.provider.getBindConstructor(TypeWithPrivateConstructor.class, false);
+		assertThat(constructor).isNull();
+	}
+
 	@Test
 	void getBindConstructorWhenIsMemberTypeWithPrivateConstructorReturnsNull() {
 		Constructor<?> constructor = this.provider.getBindConstructor(MemberTypeWithPrivateConstructor.Member.class,
@@ -224,6 +231,13 @@ static class TwoConstructorsWithBothConstructorBinding {
 
 	}
 
+	static final class TypeWithPrivateConstructor {
+
+		private TypeWithPrivateConstructor(Environment environment) {
+		}
+
+	}
+
 	static class MemberTypeWithPrivateConstructor {
 
 		static final class Member {