Allow the use of Java 17 in tests (#604)

* Allow the use of Java 17 in tests

* Drop reference to outdated bootstrap from README.md

README.md

@@ -134,14 +134,6 @@ All tests can be run from the command line using:
 
 If you're looking for more information on the output from a test, try checking the `target/maven-it/**/*IT/**` directory contents after running the tests. It will contain the project state output, including maven logs, etc. Check the [`Integration Testing Framework Users Guide`](https://khmarbaise.github.io/maven-it-extension/itf-documentation/usersguide/usersguide.html) for information, too. It's good.
 
-### Using this plugin against itself
-
-The `pom.xml` file contains a `bootstrap` profile to use the `rewrite-maven-plugin` against itself (it's a helpful plugin, why not use it to help develop itself?).
-
-```sh
-./mvnw -Pbootstrap rewrite:dryRun
-```
-
 ## Contributing
 
 We appreciate all types of contributions. See the [contributing guide](https://github.com/openrewrite/.github/blob/main/CONTRIBUTING.md) for detailed instructions on how to get started.

pom.xml

@@ -79,6 +79,9 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
 
+        <maven.compiler.testSource>17</maven.compiler.testSource>
+        <maven.compiler.testTarget>17</maven.compiler.testTarget>
+
         <!-- dependencies and plugins -->
         <jackson-bom.version>2.15.2</jackson-bom.version>
         <netty.version>4.1.94.Final</netty.version>
@@ -304,7 +307,6 @@
 
         <!-- JUnit Jupiter, and using itf-jupiter-extension to get itf support for executing everything as Maven tests -->
         <dependency>
-
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
             <scope>test</scope>
@@ -326,7 +328,6 @@
             <scope>test</scope>
         </dependency>
         <!-- Using assertj as well as custom assertions of AssertJ provided by itf-assertj -->
-        <!-- If you don’t want to use AssertJ as assertion framework you can omit them both -->
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
@@ -596,29 +597,6 @@
                 </developerConnectionUrl>
             </properties>
         </profile>
-        <profile>
-            <!-- for applying versions of the rewrite-maven-plugin against itself. -->
-            <!-- if you wanted to try using the plugin with changes made locally, you could run ./mvnw install, then set the plugin version below to the current version of the plugin being developed. -->
-            <!-- ./mvnw -Pbootstrap rewrite:help -->
-            <id>bootstrap</id>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.openrewrite.maven</groupId>
-                        <artifactId>rewrite-maven-plugin</artifactId>
-                        <version>4.40.0</version>
-                        <configuration>
-                            <activeRecipes>
-                                <recipe>org.openrewrite.java.format.AutoFormat</recipe>
-                            </activeRecipes>
-                        </configuration>
-                    </plugin>
-                </plugins>
-            </build>
-            <properties>
-                <maven.test.skip>true</maven.test.skip>
-            </properties>
-        </profile>
     </profiles>
 
     <repositories>