Unit test for getRuntimeJars exceptional case

Author: romainbrenguier

src/test/java/org/sonarqube/gradle/SonarUtilsTest.java

@@ -30,6 +30,7 @@
 import org.mockito.Mockito;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.Mockito.when;
 
 class SonarUtilsTest {
@@ -89,4 +90,17 @@ void test_join_csv_without_duplicates(){
     assertThat(SonarUtils.joinCsvStringsWithoutDuplicates(a, e)).isEqualTo("a,b,c");
   }
 
+  @Test
+  void test_getRuntimeJars_throws_IllegalStateException_when_java_home_is_invalid() {
+    String originalJavaHome = System.getProperty("java.home");
+    try {
+      // Set java.home to a path with null character, which will cause an exception in getCanonicalFile()
+      System.setProperty("java.home", "/invalid\u0000path");
+      assertThatThrownBy(SonarUtils::getRuntimeJars)
+        .isInstanceOf(IllegalStateException.class);
+    } finally {
+      System.setProperty("java.home", originalJavaHome);
+    }
+  }
+
 }