test: fix tus related assembly test

Author: ifedapoolarewaju

src/test/java/com/transloadit/sdk/AssemblyTest.java

@@ -62,13 +62,18 @@ public void save() throws Exception {
         assertEquals(savedAssembly.json().get("ok"), "ASSEMBLY_COMPLETED");
 
         mockServerClient.reset();
-        assembly.removeFile("file_name");
+    }
+
+    @Test
+    public void saveWithTus() throws Exception {
+        MockTusAssembly assembly = new MockTusAssembly(transloadit);
+        assembly.addFile(new File("LICENSE"), "file_name");
 
         mockServerClient.when(HttpRequest.request()
                 .withPath("/assemblies")
                 .withMethod("POST")
                 .withBody(regex("[\\w\\W]*tus_num_expected_upload_files\"\\r\\nContent-Length: 1" +
-                        "\\r\\n\\r\\n0[\\w\\W]*")))
+                        "\\r\\n\\r\\n1[\\w\\W]*")))
                 .respond(HttpResponse.response().withBody(getJson("resumable_assembly.json")));
 
         AssemblyResponse resumableAssembly = assembly.save(true);

src/test/java/com/transloadit/sdk/MockTusAssembly.java

@@ -0,0 +1,20 @@
+package com.transloadit.sdk;
+
+import io.tus.java.client.ProtocolException;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * This class serves as a Mock to {@link Assembly}, which can be used to test
+ * Assemblies with resumability enabled.
+ */
+public class MockTusAssembly extends Assembly {
+    public MockTusAssembly(Transloadit transloadit) {
+        super(transloadit);
+    }
+
+    protected void processTusFile(File file, String fieldName, String assemblyUrl) throws IOException, ProtocolException {
+        // do nothing
+    }
+}