[ONOS-7732] Automating switch workflow: workflow test cli command completeter

Change-Id: Iea077766cd4098689ab5c4244e60ec28f8f22145
diff --git a/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowTestCompleter.java b/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowTestCompleter.java
new file mode 100644
index 0000000..d1db459
--- /dev/null
+++ b/apps/workflow/app/src/main/java/org/onosproject/workflow/cli/WorkFlowTestCompleter.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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 org.onosproject.workflow.cli;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractChoicesCompleter;
+
+import java.util.List;
+
+import static org.onosproject.workflow.cli.WorkFlowTestCommand.INVOKE_SAMPLE;
+
+/**
+ * Workflow test command completer.
+ */
+@Service
+public class WorkFlowTestCompleter  extends AbstractChoicesCompleter {
+    @Override
+    protected List<String> choices() {
+        return ImmutableList.of(INVOKE_SAMPLE);
+    }
+}