test: add test case - find stub file in jar

spring-cloud-contract-wiremock/src/main/java/org/springframework/cloud/contract/wiremock/file/ResourcesFileSource.java

@@ -48,7 +48,7 @@ public class ResourcesFileSource implements FileSource {
 		this(toSources(resources));
 	}
 
-	private ResourcesFileSource(FileSource... sources) {
+	protected ResourcesFileSource(FileSource... sources) {
 		this.sources = sources;
 	}
 

spring-cloud-contract-wiremock/src/test/java/org/springframework/cloud/contract/wiremock/file/ResourcesFileSourceTest.java

@@ -16,15 +16,25 @@
 
 package org.springframework.cloud.contract.wiremock.file;
 
+import com.github.tomakehurst.wiremock.common.BinaryFile;
+import com.github.tomakehurst.wiremock.common.ClasspathFileSource;
 import com.github.tomakehurst.wiremock.common.FileSource;
+import java.io.File;
+import java.net.URI;
+import java.net.URISyntaxException;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.core.io.Resource;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@ExtendWith(MockitoExtension.class)
 class ResourcesFileSourceTest {
 
 	@DisplayName("find all files in the multiple files directories.")
@@ -57,4 +67,24 @@ class ResourcesFileSourceTest {
 		assertThat(resourcesFileSource.getBinaryFileNamed("response-noticeList-success.json").getStream()).isNotEmpty();
 	}
 
+	@DisplayName("find a stub file in jar")
+	@Test
+	void find_stub_file_in_jar() throws URISyntaxException {
+
+		// given
+		ClassLoader classLoader = getClass().getClassLoader();
+		File file = new File(classLoader.getResource("jarfiles/module-banner-test-fixtures.jar").getFile());
+
+		String bannerStubPathInJar = "jar:file:" + file.getAbsolutePath() + "!/wiremock/banner/__files";
+		String bannerStubFilename = "response-bannerList-success.json";
+		ClasspathFileSource classpathFileSource1 = mock(ClasspathFileSource.class);
+		when(classpathFileSource1.getUri()).thenReturn(new URI(bannerStubPathInJar));
+		when(classpathFileSource1.exists()).thenReturn(true);
+		when(classpathFileSource1.getBinaryFileNamed(bannerStubFilename)).thenReturn(new BinaryFile(new URI(bannerStubPathInJar + "/response-bannerList-success.json")));
+		ResourcesFileSource resourcesFileSource = new ResourcesFileSource(classpathFileSource1);
+
+		// when & then
+		assertThat(resourcesFileSource.getBinaryFileNamed(bannerStubFilename).getStream()).isNotEmpty();
+	}
+
 }