Add support for multiple test sources sets

src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java

@@ -458,7 +458,10 @@ private Stream<SourceFile> processTestSources(
         javaParserBuilder.classpath(testDependencies).typeCache(typeCache);
         kotlinParserBuilder.classpath(testDependencies).typeCache(new JavaTypeCache());
 
-        List<Path> testJavaSources = listJavaSources(mavenProject.getBasedir().toPath().resolve(mavenProject.getBuild().getTestSourceDirectory()));
+        Set<Path> testJavaSources = new LinkedHashSet<>(listJavaSources(mavenProject.getBasedir().toPath().resolve(mavenProject.getBuild().getTestSourceDirectory())));
+        for (String p : mavenProject.getTestCompileSourceRoots()) {
+            testJavaSources.addAll(listJavaSources(mavenProject.getBasedir().toPath().resolve(p)));
+        }
         alreadyParsed.addAll(testJavaSources);
 
         // scan Kotlin files

src/test/java/org/openrewrite/maven/RewriteRunIT.java

@@ -39,6 +39,21 @@ void multi_module_project(MavenExecutionResult result) {
                 .anySatisfy(line -> assertThat(line).contains("org.openrewrite.staticanalysis.SimplifyBooleanExpression"));
     }
 
+    @MavenTest
+    @SystemProperties({
+            @SystemProperty(value = "rewrite.activeRecipes", content = "org.openrewrite.java.search.FindTypes"),
+            @SystemProperty(value = "rewrite.options", content = "fullyQualifiedTypeName=org.junit.jupiter.api.Test")
+    })
+    @Disabled
+    void multi_source_sets_project(MavenExecutionResult result) {
+        assertThat(result)
+                .isSuccessful()
+                .out()
+                .warn()
+                .contains("Changes have been made to target/maven-it/org/openrewrite/maven/RewriteRunIT/multi_source_sets_project/project/src/integration-test/java/sample/SomeIntegrationTest.java by:")
+                .contains("Changes have been made to target/maven-it/org/openrewrite/maven/RewriteRunIT/multi_source_sets_project/project/src/test/java/sample/CoolTest.java by:");
+    }
+
     @MavenTest
     void single_project(MavenExecutionResult result) {
         assertThat(result)

src/test/resources-its/org/openrewrite/maven/RewriteRunIT/multi_source_sets_project/pom.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         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>org.openrewrite.maven</groupId>
+    <artifactId>multi_source_sets_project</artifactId>
+    <version>1.0</version>
+    <packaging>pom</packaging>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.9.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.9.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>@project.groupId@</groupId>
+                <artifactId>@project.artifactId@</artifactId>
+                <version>@project.version@</version>
+            </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>build-helper-maven-plugin</artifactId>
+                <version>3.6.0</version>
+                <executions>
+                    <execution>
+                        <id>add integration test sources</id>
+                        <phase>generate-test-sources</phase>
+                        <goals>
+                            <goal>add-test-source</goal>
+                        </goals>
+                        <configuration>
+                            <sources>
+                                <source>src/integration-test/java</source>
+                            </sources>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/test/resources-its/org/openrewrite/maven/RewriteRunIT/multi_source_sets_project/src/integration-test/java/sample/SomeIntegrationTest.java

@@ -0,0 +1,10 @@
+package sample;
+
+import org.junit.jupiter.api.Test;
+
+class SomeIntegrationTest {
+    @Test
+    void testBar() {
+
+    }
+}

src/test/resources-its/org/openrewrite/maven/RewriteRunIT/multi_source_sets_project/src/test/java/sample/CoolTest.java

@@ -0,0 +1,8 @@
+package sample;
+
+import org.junit.jupiter.api.Test;
+
+class CoolTest {
+    @Test
+    void testBar() {}
+}