[MNG-4660] Use of --resume-from in multi-module project fails with missing inter-module dependencies

its/core-it-suite/pom.xml

@@ -91,6 +91,12 @@ under the License.
       <version>4.12</version>
       <!-- NOTE: Use compile scope for transitivity. -->
     </dependency>
+    <dependency>
+      <groupId>org.hamcrest</groupId>
+      <artifactId>hamcrest-all</artifactId>
+      <version>1.3</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>

its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java

@@ -107,6 +107,8 @@ public class IntegrationTestSuite
         // -------------------------------------------------------------------------------------------------------------
         // suite.addTestSuite( MavenIT0108SnapshotUpdateTest.class ); -- MNG-3137
 
+        suite.addTestSuite( MavenITmng4660ResumeFromTest.class );
+        suite.addTestSuite( MavenITmng4660OutdatedPackagedArtifact.class );
         suite.addTestSuite( MavenITmng6759TransitiveDependencyRepositoriesTest.class );
         suite.addTestSuite( MavenITmng6720FailFastTest.class );
         suite.addTestSuite( MavenITmng6558ToolchainsBuildingEventTest.class );

its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4660OutdatedPackagedArtifact.java

@@ -0,0 +1,122 @@
+package org.apache.maven.it;
+
+/*
+ * 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.it.util.ResourceExtractor;
+import org.apache.maven.shared.utils.io.FileUtils;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.junit.Assert.assertThat;
+import static org.hamcrest.Matchers.greaterThan;
+
+/**
+ * This is a test case for a new check introduced with <a href="https://issues.apache.org/jira/browse/MNG-4660">MNG-4660</a>.
+ * That check verifies if a packaged artifact within the Reactor is up-to-date with the outputDirectory of the same project.
+ *
+ * @author Maarten Mulders
+ * @author Martin Kanters
+ */
+public class MavenITmng4660OutdatedPackagedArtifact extends AbstractMavenIntegrationTestCase {
+    public MavenITmng4660OutdatedPackagedArtifact()
+    {
+        super( "[3.7.0,)" );
+    }
+
+    /**
+     * Test that Maven logs a warning when a packaged artifact is found that is older than the outputDirectory of the
+     * same artifact.
+     */
+    public void testShouldWarnWhenPackagedArtifactIsOutdated() throws Exception
+    {
+        final File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-4660-outdated-packaged-artifact" );
+
+        // 1. Package the whole project
+        final Verifier verifier1 = newVerifier( testDir.getAbsolutePath() );
+        verifier1.deleteDirectory( "target" );
+        verifier1.deleteArtifacts( "org.apache.maven.its.mng4660" );
+
+        verifier1.executeGoal( "package" );
+
+        Path module1Jar = testDir.toPath().resolve( "module-a/target/module-a-1.0.jar" ).toAbsolutePath();
+        verifier1.verifyErrorFreeLog();
+        verifier1.assertFilePresent( module1Jar.toString() );
+        verifier1.resetStreams();
+
+        if ( System.getProperty( "java.version", "" ).startsWith( "1." ) )
+        {
+            // Simulating the delay between two invocations. It also makes sure we're not hit by tests that run so fast,
+            // that the difference in file modification time (see below) is too small to observe. Java 8 on Linux and
+            // macOS returns that value with "just" second precision, which is not detailed enough.
+            Thread.sleep( 1_000 );
+        }
+
+        // 2. Create a properties file with some content and compile only that module (module A).
+        final Verifier verifier2 = newVerifier( testDir.getAbsolutePath() );
+        final Path resourcesDirectory = Files.createDirectories( Paths.get( testDir.toString(), "module-a", "src", "main", "resources" ) );
+        final Path fileToWrite = resourcesDirectory.resolve( "example.properties" );
+        FileUtils.fileWrite( fileToWrite.toString(), "x=42" );
+
+        verifier2.setAutoclean( false );
+        verifier2.addCliOption( "--projects" );
+        verifier2.addCliOption( ":module-a" );
+        verifier2.executeGoal( "compile" );
+
+        Path module1PropertiesFile = testDir.toPath().resolve( "module-a/target/classes/example.properties" )
+                .toAbsolutePath();
+
+        verifier2.assertFilePresent( module1PropertiesFile.toString() );
+        assertThat( Files.getLastModifiedTime( module1PropertiesFile ),
+                greaterThan ( Files.getLastModifiedTime( module1Jar ) ) );
+
+        Path module1Class = testDir.toPath().resolve( "module-a/target/classes/org/apache/maven/it/Example.class" )
+                        .toAbsolutePath();
+        verifier2.verifyErrorFreeLog();
+        verifier2.assertFilePresent( module1Class.toString() );
+        verifier2.resetStreams();
+
+        // 3. Resume project build from module B, that depends on module A we just touched. Its packaged artifact
+        // is no longer in sync with its compiled artifacts.
+        final Verifier verifier3 = newVerifier( testDir.getAbsolutePath() );
+        verifier3.setAutoclean( false );
+        verifier3.addCliOption( "--resume-from" );
+        verifier3.addCliOption( ":module-b" );
+        verifier3.executeGoal( "compile" );
+
+        verifier3.verifyErrorFreeLog();
+        try
+        {
+            verifier3.verifyTextInLog( "Packaged artifact is not up-to-date" );
+        }
+        catch ( VerificationException e )
+        {
+            String message = e.getMessage() + System.lineSeparator();
+            message += "  " + module1Jar.getFileName() + " -> " + Files.getLastModifiedTime( module1Jar )
+                            + System.lineSeparator();
+            message += "  " + module1PropertiesFile.getFileName() + " -> " + Files.getLastModifiedTime( module1PropertiesFile )
+                            + System.lineSeparator();
+            throw new VerificationException( message, e.getCause() );
+        }
+        verifier3.resetStreams();
+    }
+}

its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4660ResumeFromTest.java

@@ -0,0 +1,112 @@
+package org.apache.maven.it;
+
+/*
+ * 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.it.util.ResourceExtractor;
+
+import java.io.File;
+
+/**
+ * This is a test case for <a href="https://issues.apache.org/jira/browse/MNG-4660">MNG-4660</a>.
+ *
+ * @author Maarten Mulders
+ * @author Martin Kanters
+ */
+public class MavenITmng4660ResumeFromTest extends AbstractMavenIntegrationTestCase {
+    public MavenITmng4660ResumeFromTest()
+    {
+        super( "[3.7.0,)" );
+    }
+
+    /**
+     * Test that the --resume-from flag resolves dependencies inside the same Maven project
+     * without having them installed first.
+     * This test case uses the target/classes folder of module-a, for the situation where
+     * module-a has not been packaged.
+     */
+    public void testShouldResolveOutputDirectoryFromEarlierBuild() throws Exception
+    {
+        final File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-4660-resume-from" );
+
+        final Verifier verifier1 = newVerifier( testDir.getAbsolutePath() );
+        verifier1.deleteDirectory( "target" );
+        verifier1.deleteArtifacts( "org.apache.maven.its.mng4660" );
+
+        try
+        {
+            verifier1.executeGoal( "test" ); // The test goal will not create a packaged artifact
+            fail( "Expected this invocation to fail" ); // See TestCase.java
+        }
+        catch ( final VerificationException ve )
+        {
+            verifier1.verifyTextInLog( "Deliberately fail test case" );
+        }
+        finally
+        {
+            verifier1.resetStreams();
+        }
+
+        final Verifier verifier2 = newVerifier( testDir.getAbsolutePath() );
+        verifier2.setAutoclean( false );
+        verifier2.addCliOption( "--resume-from" );
+        verifier2.addCliOption( ":module-b" );
+        verifier2.executeGoal( "compile" ); // to prevent the unit test from failing (again)
+
+        verifier2.verifyErrorFreeLog();
+        verifier2.resetStreams();
+    }
+
+    /**
+     * Test that the --resume-from flag resolves dependencies inside the same Maven project
+     * without having them installed first.
+     * This test case uses the packaged artifact of module-a.
+     */
+    public void testShouldResolvePackagedArtifactFromEarlierBuild() throws Exception
+    {
+        final File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-4660-resume-from" );
+
+        final Verifier verifier1 = newVerifier( testDir.getAbsolutePath() );
+        verifier1.deleteDirectory( "target" );
+        verifier1.deleteArtifacts( "org.apache.maven.its.mng4660" );
+
+        try
+        {
+            verifier1.executeGoal( "verify" ); // The verify goal will create a packaged artifact
+            fail( "Expected this invocation to fail" ); // See TestCase.java
+        }
+        catch ( final VerificationException ve )
+        {
+            verifier1.verifyTextInLog( "Deliberately fail test case" );
+        }
+        finally
+        {
+            verifier1.resetStreams();
+        }
+
+        final Verifier verifier2 = newVerifier( testDir.getAbsolutePath() );
+        verifier2.setAutoclean( false );
+        verifier2.addCliOption( "--resume-from" );
+        verifier2.addCliOption( ":module-b" );
+        verifier2.executeGoal( "compile" ); // to prevent the unit test from failing (again)
+
+        verifier2.verifyErrorFreeLog();
+        verifier2.resetStreams();
+    }
+}

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/module-a/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>module-a</artifactId>
+
+    <parent>
+        <groupId>org.apache.maven.its.mng4660</groupId>
+        <artifactId>parent</artifactId>
+        <version>1.0</version>
+    </parent>
+
+</project>

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/module-a/src/main/java/org/apache/maven/it/Example.java

@@ -0,0 +1,24 @@
+package org.apache.maven.it;
+
+/*
+ * 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.
+ */
+
+public class Example
+{
+}

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/module-b/pom.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>module-b</artifactId>
+
+    <parent>
+        <groupId>org.apache.maven.its.mng4660</groupId>
+        <artifactId>parent</artifactId>
+        <version>1.0</version>
+    </parent>
+
+    <dependencies>
+      <dependency>
+          <groupId>org.apache.maven.its.mng4660</groupId>
+          <artifactId>module-a</artifactId>
+          <version>1.0</version>
+      </dependency>
+    </dependencies>
+
+</project>

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/module-b/src/main/java/org/apache/maven/it/AnotherExample.java

@@ -0,0 +1,28 @@
+package org.apache.maven.it;
+
+/*
+ * 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.
+ */
+
+public class AnotherExample
+{
+    public AnotherExample()
+    {
+        new Example();
+    }
+}

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/module-b/src/test/java/org/apache/maven/it/TestCase.java

@@ -0,0 +1,31 @@
+package org.apache.maven.it;
+
+/*
+ * 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.junit.Test;
+
+public class TestCase
+{
+    @Test
+    public void testCase()
+    {
+        final Example example = new Example();
+    }
+}

its/core-it-suite/src/test/resources/mng-4660-outdated-packaged-artifact/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.apache.maven.its.mng4660</groupId>
+    <artifactId>parent</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <name>Maven Integration Test :: MNG-4660</name>
+    <description>
+        This is a test case for a new check which verifies if a packaged artifact
+        within the Reactor is up-to-date with the outputDirectory of the same project.
+    </description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <modules>
+        <module>module-b</module>
+        <module>module-a</module>
+    </modules>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

its/core-it-suite/src/test/resources/mng-4660-resume-from/module-a/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>module-a</artifactId>
+
+    <parent>
+        <groupId>org.apache.maven.its.mng4660</groupId>
+        <artifactId>parent</artifactId>
+        <version>1.0</version>
+    </parent>
+
+</project>

its/core-it-suite/src/test/resources/mng-4660-resume-from/module-a/src/main/java/org/apache/maven/it/Example.java

@@ -0,0 +1,24 @@
+package org.apache.maven.it;
+
+/*
+ * 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.
+ */
+
+public class Example
+{
+}

its/core-it-suite/src/test/resources/mng-4660-resume-from/module-b/pom.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>module-b</artifactId>
+
+    <parent>
+        <groupId>org.apache.maven.its.mng4660</groupId>
+        <artifactId>parent</artifactId>
+        <version>1.0</version>
+    </parent>
+
+    <dependencies>
+      <dependency>
+          <groupId>org.apache.maven.its.mng4660</groupId>
+          <artifactId>module-a</artifactId>
+          <version>1.0</version>
+      </dependency>
+    </dependencies>
+
+</project>

its/core-it-suite/src/test/resources/mng-4660-resume-from/module-b/src/main/java/org/apache/maven/it/AnotherExample.java

@@ -0,0 +1,28 @@
+package org.apache.maven.it;
+
+/*
+ * 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.
+ */
+
+public class AnotherExample
+{
+    public AnotherExample()
+    {
+        new Example();
+    }
+}

its/core-it-suite/src/test/resources/mng-4660-resume-from/module-b/src/test/java/org/apache/maven/it/TestCase.java

@@ -0,0 +1,34 @@
+package org.apache.maven.it;
+
+/*
+ * 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.junit.Test;
+
+import static org.junit.Assert.fail;
+
+public class TestCase
+{
+    @Test
+    public void testCase()
+    {
+        final Example example = new Example();
+        fail( "Deliberately fail test case" );
+    }
+}

its/core-it-suite/src/test/resources/mng-4660-resume-from/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+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.
+-->
+
+<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/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.apache.maven.its.mng4660</groupId>
+    <artifactId>parent</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <name>Maven Integration Test :: MNG-4660</name>
+    <description>
+        Test that the --resume-from flag resolves dependencies inside the same Maven project
+        without having them installed first.
+    </description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <modules>
+        <module>module-b</module>
+        <module>module-a</module>
+    </modules>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>