Skip checksum validation for multifile downloads where no checksum is provided

Author: kylstevenson

src/test/java/io/github/jpmorganchase/fusion/FusionTest.java

@@ -255,19 +255,22 @@ public void testFileDownloadInteraction() throws Exception {
     public void testFileDownloadWithSkipsChecksumValidationWhenMissing() throws Exception {
         Fusion f = stubFusion();
 
-        String datasetJson = "{\"resources\": []}";
+        // Mock dataset response for checksum validation check
+        String datasetJsonRaw = "{\"identifier\":\"sample_dataset\",\"deliveryChannel\":[\"glue\"]}";
         Dataset glueDataset = Dataset.builder()
                 .identifier("sample_dataset")
-                .varArg("deliveryChannel", Arrays.asList("Glue"))
+                .varArg("deliveryChannel", Arrays.asList("glue"))
                 .build();
         Map<String, Dataset> datasets = new HashMap<>();
         datasets.put("sample_dataset", glueDataset);
 
         when(apiManager.callAPI(
                         String.format("%scatalogs/%s/datasets/%s", config.getRootURL(), "common", "sample_dataset")))
-                .thenReturn(datasetJson);
-        when(responseParser.parseDatasetResponse(datasetJson, "common")).thenReturn(datasets);
+                .thenReturn(datasetJsonRaw);
+        when(responseParser.parseDatasetResponse(String.format("{\"resources\":[%s]}", datasetJsonRaw), "common"))
+                .thenReturn(datasets);
 
+        // Mock distribution files response
         String jsonResponse = "{\"resources\": [{\"identifier\": \"file1\"}]}";
         Map<String, DistributionFile> stubResponse = new LinkedHashMap<>();
         stubResponse.put(