Fixing #315: Guarding against newVersion or property being empty if t…

…he properties file is not provided

src/main/java/org/codehaus/mojo/versions/SetPropertyMojo.java

@@ -22,7 +22,9 @@
 import javax.xml.stream.XMLStreamException;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Map;
 
 import org.apache.commons.lang3.StringUtils;
@@ -35,6 +37,8 @@
 import org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader;
 import org.codehaus.mojo.versions.utils.PropertiesVersionsFileReader;
 
+import static org.apache.commons.lang3.StringUtils.isBlank;
+
 /**
  * Set a property to a given version without any sanity checks. Please be careful this can lead to changes which might
  * not build anymore. The sanity checks are done by other goals like <code>update-properties</code> or
@@ -79,6 +83,31 @@ public class SetPropertyMojo
     @Parameter( property = "propertiesVersionsFile" )
     private String propertiesVersionsFile;
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void execute() throws MojoExecutionException, MojoFailureException
+    {
+        List<String> problems = new ArrayList<>();
+        if ( isBlank( propertiesVersionsFile ) )
+        {
+            if ( isBlank( newVersion ) )
+            {
+                problems.add( "newVersion must not be empty" );
+            }
+            if ( isBlank( property ) )
+            {
+                problems.add( "property must not be empty" );
+            }
+        }
+        if ( !problems.isEmpty() )
+        {
+            throw new MojoExecutionException( "Invalid execution arguments: " + String.join( ", ", problems ) );
+        }
+        super.execute();
+    }
+
     /**
      * @param pom the pom to update.
      * @throws MojoExecutionException when things go wrong
@@ -120,7 +149,7 @@ else if ( !StringUtils.isEmpty( property ) )
                         propertyConfig.setVersion( newVersion );
                         return propertyConfig;
                     } )
-                .toArray( size -> new Property[size] );
+                .toArray( Property[]::new );
             properties = property;
         }
         else

src/test/java/org/codehaus/mojo/versions/SetPropertyMojoTest.java

@@ -0,0 +1,73 @@
+package org.codehaus.mojo.versions;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+import org.apache.maven.plugin.MojoExecutionException;
+import org.codehaus.mojo.versions.utils.BaseMojoTestCase;
+import org.junit.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.is;
+
+/**
+ * Basic tests for {@linkplain SetPropertyMojoTest}.
+ *
+ * @author Andrzej Jarmoniuk
+ */
+public class SetPropertyMojoTest extends BaseMojoTestCase
+{
+    @Test
+    public void testNullNewVersion()
+            throws Exception
+    {
+        SetPropertyMojo mojo = createMojo( "set-property",
+                "src/test/resources/org/codehaus/mojo/set-property/null-new-version-pom.xml" );
+        assertThat( mojo.getProject().getProperties(), is( mojo.getProject().getModel().getProperties() ) );
+        try
+        {
+            mojo.execute();
+            fail();
+        }
+        catch ( MojoExecutionException e )
+        {
+            assertThat( e.getMessage(),
+                    containsString( "Invalid execution arguments: newVersion must not be empty" ) );
+        }
+    }
+
+    @Test
+    public void testNullProperty()
+            throws Exception
+    {
+        SetPropertyMojo mojo = createMojo( "set-property",
+                "src/test/resources/org/codehaus/mojo/set-property/null-property-pom.xml" );
+        try
+        {
+            mojo.execute();
+            fail();
+        }
+        catch ( MojoExecutionException e )
+        {
+            assertThat( e.getMessage(),
+                    containsString( "Invalid execution arguments: property must not be empty" ) );
+        }
+    }
+}

src/test/java/org/codehaus/mojo/versions/utils/BaseMojoTestCase.java

@@ -3,6 +3,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.Properties;
 
 import org.apache.maven.model.Build;
 import org.apache.maven.model.Model;
@@ -58,6 +59,7 @@ public abstract class BaseMojoTestCase extends AbstractMojoTestCase
      * @return a Mojo instance
      * @throws Exception thrown if mojo lookup fails
      */
+    @SuppressWarnings( "unchecked" )
     protected <T extends Mojo> T createMojo( String goal, String pomFilePath ) throws Exception
     {
         File pomFile = new File( pomFilePath );
@@ -109,5 +111,11 @@ public File getBasedir()
         {
             return pomFile.getParentFile();
         }
+
+        @Override
+        public Properties getProperties()
+        {
+            return getModel().getProperties();
+        }
     }
 }

src/test/resources/org/codehaus/mojo/set-property/null-new-version-pom.xml

@@ -0,0 +1,31 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>default-group</groupId>
+    <artifactId>default-artifact</artifactId>
+    <version>1.0</version>
+    <packaging>pom</packaging>
+
+    <properties>
+        <dummy-api-version>1.0.0</dummy-api-version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>localhost</groupId>
+            <artifactId>dummy-api</artifactId>
+            <version>${dummy-api-version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>versions-maven-plugin</artifactId>
+                <configuration>
+                    <property>dummy-api-version</property>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/test/resources/org/codehaus/mojo/set-property/null-property-pom.xml

@@ -0,0 +1,31 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>default-group</groupId>
+    <artifactId>default-artifact</artifactId>
+    <version>1.0</version>
+    <packaging>pom</packaging>
+
+    <properties>
+        <dummy-api-version>1.0.0</dummy-api-version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>localhost</groupId>
+            <artifactId>dummy-api</artifactId>
+            <version>${dummy-api-version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>versions-maven-plugin</artifactId>
+                <configuration>
+                    <newVersion>2.0.0</newVersion>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>