Try to fix NestedFileSystemProviderTests on Windows

See gh-7161

spring-boot-project/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/nio/file/NestedFileSystemProviderTests.java

@@ -30,9 +30,12 @@ import java.nio.file.StandardOpenOption;
 import java.nio.file.attribute.BasicFileAttributeView;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.nio.file.spi.FileSystemProvider;
+import java.util.ArrayList;
 import java.util.Collections;
+import java.util.List;
 import java.util.Set;
 
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
@@ -69,6 +72,11 @@ class NestedFileSystemProviderTests {
 		this.uriPrefix = "nested:" + this.file.toURI().getPath() + "/!";
 	}
 
+	@AfterEach
+	void cleanUp() {
+		this.provider.cleanUp();
+	}
+
 	@Test
 	void getSchemeReturnsScheme() {
 		assertThat(this.provider.getScheme()).isEqualTo("nested");
@@ -259,6 +267,8 @@ class NestedFileSystemProviderTests {
 
 		private Path mockJarPath;
 
+		private List<Path> paths = new ArrayList<>();
+
 		@Override
 		protected Path getJarPath(Path path) {
 			return (this.mockJarPath != null) ? this.mockJarPath : super.getJarPath(path);
@@ -268,6 +278,24 @@ class NestedFileSystemProviderTests {
 			this.mockJarPath = mockJarPath;
 		}
 
+		@Override
+		public Path getPath(URI uri) {
+			Path path = super.getPath(uri);
+			this.paths.add(path);
+			return path;
+		}
+
+		private void cleanUp() {
+			this.paths.forEach((path) -> {
+				try {
+					Path.of(path.toUri()).getFileSystem().close();
+				}
+				catch (Exception ex) {
+					// Ignore
+				}
+			});
+		}
+
 	}
 
 }