Add failing test for #3705

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/util/BiConsumerT.java

@@ -0,0 +1,11 @@
+package uk.ac.ic.wlgitbridge.util;
+
+/**
+ * BiConsumer interface that allows checked exceptions.
+ */
+@FunctionalInterface
+public interface BiConsumerT<T, U, E extends Throwable> {
+
+    void accept(T t, U u) throws E;
+
+}

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/util/FunctionT.java

@@ -0,0 +1,14 @@
+package uk.ac.ic.wlgitbridge.util;
+
+/**
+ * Function interface that allows checked exceptions.
+ * @param <T>
+ * @param <R>
+ * @param <E>
+ */
+@FunctionalInterface
+public interface FunctionT<T, R, E extends Throwable> {
+
+    R apply(T t) throws E;
+
+}

services/git-bridge/src/main/java/uk/ac/ic/wlgitbridge/util/ResourceUtil.java

@@ -0,0 +1,32 @@
+package uk.ac.ic.wlgitbridge.util;
+
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
+
+public class ResourceUtil {
+
+    /**
+     * Creates a copy of a resource folder. Mainly used for testing to prevent
+     * the original folder from being mangled.
+     *
+     * It will have the same name as the original.
+     * @param resource the resource name, e.g. "/uk/ac/ic/wlgitbridge/file.txt"
+     * @param folderProvider function used to create the folder.
+     *                       E.g. TemporaryFolder from junit
+     * @return
+     * @throws IOException
+     */
+    public static File copyOfFolderResource(
+            String resource,
+            FunctionT<String, File, IOException> folderProvider
+    ) throws IOException {
+        File original
+                = new File(ResourceUtil.class.getResource(resource).getFile());
+        File tmp = folderProvider.apply(original.getName());
+        FileUtils.copyDirectory(original, tmp);
+        return tmp;
+    }
+
+}