Tests for DecisionsHelper (#972)

Author: jakobht

src/test/java/com/uber/cadence/internal/replay/DecisionsHelperTest.java

@@ -0,0 +1,116 @@
+/*
+ *  Copyright 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *  Modifications copyright (C) 2017 Uber Technologies, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"). You may not
+ *  use this file except in compliance with the License. A copy of the License is
+ *  located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ *  or in the "license" file accompanying this file. This file 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.cadence.internal.replay;
+
+import com.google.common.collect.ImmutableList;
+import com.uber.cadence.Decision;
+import com.uber.cadence.DecisionType;
+import com.uber.cadence.HistoryEvent;
+import com.uber.cadence.ScheduleActivityTaskDecisionAttributes;
+import java.util.Collections;
+import java.util.List;
+import junit.framework.TestCase;
+import org.junit.Test;
+
+public class DecisionsHelperTest extends TestCase {
+  @Test
+  public void testGetDecisionsSimple() {
+    // Start the decision
+    DecisionsHelper decisionsHelper = new DecisionsHelper(null, null);
+
+    HistoryHelper.DecisionEvents decisionEvents =
+        new HistoryHelper.DecisionEvents(
+            Collections.emptyList(), ImmutableList.of(new HistoryEvent()), false, 123, 456);
+
+    decisionsHelper.handleDecisionTaskStartedEvent(decisionEvents);
+
+    // Schedule 2 activity tasks
+    ScheduleActivityTaskDecisionAttributes scheduleActivityTaskDecisionAttributes =
+        new ScheduleActivityTaskDecisionAttributes();
+    scheduleActivityTaskDecisionAttributes.setActivityId("testActivityId");
+
+    decisionsHelper.scheduleActivityTask(scheduleActivityTaskDecisionAttributes);
+    decisionsHelper.scheduleActivityTask(scheduleActivityTaskDecisionAttributes);
+
+    // Act
+    List<Decision> decisions = decisionsHelper.getDecisions();
+
+    // Assert
+    assertEquals(2, decisions.size());
+  }
+
+  private static final int MAXIMUM_DECISIONS_PER_COMPLETION = 10000;
+
+  @Test
+  public void testGetDecisionsManyDecisions() {
+    // Start the decision
+    DecisionsHelper decisionsHelper = new DecisionsHelper(null, null);
+
+    HistoryHelper.DecisionEvents decisionEvents =
+        new HistoryHelper.DecisionEvents(
+            Collections.emptyList(), ImmutableList.of(new HistoryEvent()), false, 123, 456);
+
+    decisionsHelper.handleDecisionTaskStartedEvent(decisionEvents);
+
+    // Schedule more than MAXIMUM_DECISIONS_PER_COMPLETION activity tasks
+    ScheduleActivityTaskDecisionAttributes scheduleActivityTaskDecisionAttributes =
+        new ScheduleActivityTaskDecisionAttributes();
+    scheduleActivityTaskDecisionAttributes.setActivityId("testActivityId");
+
+    for (int i = 0; i < MAXIMUM_DECISIONS_PER_COMPLETION * 2; i++) {
+      decisionsHelper.scheduleActivityTask(scheduleActivityTaskDecisionAttributes);
+    }
+
+    // Act
+    List<Decision> decisions = decisionsHelper.getDecisions();
+
+    // Assert
+    assertEquals(MAXIMUM_DECISIONS_PER_COMPLETION, decisions.size());
+
+    // Check that the last decision is a FORCE_IMMEDIATE_DECISION_TIMER
+    Decision lastDecision = decisions.get(decisions.size() - 1);
+    assertEquals(DecisionType.StartTimer, lastDecision.getDecisionType());
+    String timerId = lastDecision.getStartTimerDecisionAttributes().getTimerId();
+    assertEquals(timerId, DecisionsHelper.FORCE_IMMEDIATE_DECISION_TIMER);
+  }
+
+  @Test
+  public void testNotifyDecisionSent() {
+    DecisionsHelper decisionsHelper = new DecisionsHelper(null, null);
+
+    // Start the decision
+    HistoryHelper.DecisionEvents decisionEvents =
+        new HistoryHelper.DecisionEvents(
+            Collections.emptyList(), ImmutableList.of(new HistoryEvent()), false, 123, 456);
+
+    decisionsHelper.handleDecisionTaskStartedEvent(decisionEvents);
+
+    // Schedule activity task
+    ScheduleActivityTaskDecisionAttributes scheduleActivityTaskDecisionAttributes =
+        new ScheduleActivityTaskDecisionAttributes();
+    scheduleActivityTaskDecisionAttributes.setActivityId("testActivityId");
+
+    decisionsHelper.scheduleActivityTask(scheduleActivityTaskDecisionAttributes);
+
+    // Act
+    decisionsHelper.notifyDecisionSent();
+
+    // The decision is sent so it's not returned anymore
+    assertEquals(0, decisionsHelper.getDecisions().size());
+  }
+}