Explicitly handle lack of append() support during LogWriting

hoodie-common/src/test/java/com/uber/hoodie/common/storage/TestStorageSchemes.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018 Uber Technologies, Inc. (hoodie-dev-group@uber.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *          http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.uber.hoodie.common.storage;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
+public class TestStorageSchemes {
+
+  @Test
+  public void testStorageSchemes() {
+    assertTrue(StorageSchemes.isSchemeSupported("hdfs"));
+    assertFalse(StorageSchemes.isSchemeSupported("s2"));
+    assertFalse(StorageSchemes.isAppendSupported("s3a"));
+    assertFalse(StorageSchemes.isAppendSupported("gs"));
+    assertTrue(StorageSchemes.isAppendSupported("viewfs"));
+    try {
+      StorageSchemes.isAppendSupported("s2");
+      fail("Should throw exception for unsupported schemes");
+    } catch (IllegalArgumentException ignore) {
+      // expected.
+    }
+  }
+}