SafeDeleteNodeCommandTest.java

/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.workbench.common.stunner.core.graph.command.impl;

import java.util.LinkedList;
import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.kie.workbench.common.stunner.core.command.Command;
import org.kie.workbench.common.stunner.core.command.CommandResult;
import org.kie.workbench.common.stunner.core.graph.Edge;
import org.kie.workbench.common.stunner.core.graph.Node;
import org.kie.workbench.common.stunner.core.graph.command.GraphCommandExecutionContext;
import org.kie.workbench.common.stunner.core.graph.content.relationship.Child;
import org.kie.workbench.common.stunner.core.rule.RuleEvaluationContext;
import org.kie.workbench.common.stunner.core.rule.RuleViolation;
import org.kie.workbench.common.stunner.core.rule.context.CardinalityContext;
import org.kie.workbench.common.stunner.core.rule.context.ElementCardinalityContext;
import org.mockito.ArgumentCaptor;
import org.mockito.runners.MockitoJUnitRunner;

import static org.junit.Assert.*;
import static org.kie.workbench.common.stunner.core.TestingGraphUtils.verifyCardinality;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.*;

@RunWith(MockitoJUnitRunner.class)
public class SafeDeleteNodeCommandTest extends AbstractGraphCommandTest {

    private static final String UUID = "nodeUUID";
    private static final String UUID1 = "node1UUID";
    private static final String EDGE_UUID = "edgeUUID";

    private Node node;
    private Node node1;
    private Edge edge;
    private final List nodeOutEdges = new LinkedList();
    private final List nodeInEdges = new LinkedList();
    private final List nodeOutEdges1 = new LinkedList();
    private final List nodeInEdges1 = new LinkedList();
    private SafeDeleteNodeCommand tested;

    @Before
    public void setup() throws Exception {
        super.init(500,
                   500);
        node = mockNode(UUID);
        node1 = mockNode(UUID1);
        edge = mockEdge(EDGE_UUID);
        graphNodes.add(node);
        graphNodes.add(node1);
        when(graphIndex.getNode(eq(UUID))).thenReturn(node);
        when(graphIndex.getNode(eq(UUID))).thenReturn(node);
        when(graphIndex.getEdge(eq(EDGE_UUID))).thenReturn(edge);
        when(node.getOutEdges()).thenReturn(nodeOutEdges);
        when(node.getInEdges()).thenReturn(nodeInEdges);
        when(node1.getOutEdges()).thenReturn(nodeOutEdges1);
        when(node1.getInEdges()).thenReturn(nodeInEdges1);
        this.tested = new SafeDeleteNodeCommand(UUID);
    }

    @Test
    @SuppressWarnings("unchecked")
    public void testSingleNode() {
        CommandResult<RuleViolation> result = tested.allow(graphCommandExecutionContext);
        List<Command<GraphCommandExecutionContext, RuleViolation>> commands = tested.getCommands();
        assertNotNull(commands);
        assertTrue(1 == commands.size());
        Command command1 = commands.get(0);
        assertTrue(command1 instanceof DeregisterNodeCommand);
        assertEquals(CommandResult.Type.INFO,
                     result.getType());
        final ArgumentCaptor<RuleEvaluationContext> contextCaptor = ArgumentCaptor.forClass(RuleEvaluationContext.class);
        verify(ruleManager,
               times(2)).evaluate(eq(ruleSet),
                                  contextCaptor.capture());
        final List<RuleEvaluationContext> contexts = contextCaptor.getAllValues();
        assertEquals(2,
                     contexts.size());
        verifyCardinality((ElementCardinalityContext) contexts.get(0),
                          graph,
                          node,
                          CardinalityContext.Operation.DELETE);
    }

    @Test
    @SuppressWarnings("unchecked")
    public void testMultipleNodes() {
        initializeTheChildNode();
        CommandResult<RuleViolation> result = tested.allow(graphCommandExecutionContext);
        List<Command<GraphCommandExecutionContext, RuleViolation>> commands = tested.getCommands();
        assertNotNull(commands);
        assertTrue(2 == commands.size());
        assertTrue(contains(commands,
                            DeregisterNodeCommand.class));
        assertTrue(contains(commands,
                            SafeDeleteNodeCommand.class));
        assertEquals(CommandResult.Type.INFO,
                     result.getType());
        final ArgumentCaptor<RuleEvaluationContext> contextCaptor = ArgumentCaptor.forClass(RuleEvaluationContext.class);
        // TODO: 9 times!?
        verify(ruleManager,
               times(9)).evaluate(eq(ruleSet),
                                  contextCaptor.capture());
        final List<RuleEvaluationContext> contexts = contextCaptor.getAllValues();
        assertEquals(9,
                     contexts.size());
        verifyCardinality((ElementCardinalityContext) contexts.get(8),
                          graph,
                          node,
                          CardinalityContext.Operation.DELETE);
    }

    @Test
    @SuppressWarnings("unchecked")
    public void testAllowNoRules() {
        when(graphCommandExecutionContext.getRuleManager()).thenReturn(null);
        CommandResult<RuleViolation> result = tested.allow(graphCommandExecutionContext);
        assertEquals(CommandResult.Type.INFO,
                     result.getType());
        verify(ruleManager,
               times(0)).evaluate(eq(ruleSet),
                                  any(RuleEvaluationContext.class));
    }

    @SuppressWarnings("unchecked")
    private void initializeTheChildNode() {
        Child edgeContent = mock(Child.class);
        when(edge.getContent()).thenReturn(edgeContent);
        when(edge.getSourceNode()).thenReturn(node);
        when(edge.getTargetNode()).thenReturn(node1);
        nodeOutEdges.add(edge);
        nodeInEdges1.add(edge);
    }

    @SuppressWarnings("unchecked")
    private boolean contains(List commands,
                             Class<?> clazz) {
        return commands.stream().filter(command -> command.getClass().isAssignableFrom(clazz)).findFirst().isPresent();
    }
}