Java: Add test for selecting the highest compiler release in a pom

Author: IdrissRio

java/ql/integration-tests/java/maven-execution-specific-java-version/pom.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<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>com.example</groupId>
+  <artifactId>maven-execution-specific-java-version</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>maven-execution-specific-java-version</name>
+  <description>Test case: Project with execution-specific Java versions (Java 11 for main, Java 17 for test). Maven.java should detect the highest version (17) and use it for compilation.</description>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.13.0</version>
+        <executions>
+          <!-- Compilation for src/main/java -->
+          <execution>
+            <id>default-compile</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>11</release> <!-- Java 11 for main -->
+            </configuration>
+          </execution>
+
+          <!-- Compilation for src/test/java -->
+          <execution>
+            <id>default-testCompile</id>
+            <phase>test-compile</phase>
+            <goals>
+              <goal>testCompile</goal>
+            </goals>
+            <configuration>
+              <release>17</release> <!-- Java 17 for test -->
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

java/ql/integration-tests/java/maven-execution-specific-java-version/source_archive.expected

@@ -0,0 +1,4 @@
+pom.xml
+src/main/java/com/example/App.java
+src/test/java/com/example/AppTest.java
+target/maven-archiver/pom.properties

java/ql/integration-tests/java/maven-execution-specific-java-version/src/main/java/com/example/App.java

@@ -0,0 +1,12 @@
+package com.example;
+
+public class App {
+    public static void main(String[] args) {
+        var message = "Hello World! Running on Java " + System.getProperty("java.version");
+        System.out.println(message);
+    }
+
+    public String getMessage() {
+        return "Hello from App";
+    }
+}

java/ql/integration-tests/java/maven-execution-specific-java-version/src/test/java/com/example/AppTest.java

@@ -0,0 +1,11 @@
+package com.example;
+
+public class AppTest {
+    public static void main(String[] args) {
+        var text = """
+            Hello
+            World
+            """;
+        System.out.println(text.strip());
+    }
+}

java/ql/integration-tests/java/maven-execution-specific-java-version/test.py

@@ -0,0 +1,2 @@
+def test(codeql, java):
+    codeql.database.create()