exceptionfactory commented on code in PR #10720:
URL: https://github.com/apache/nifi/pull/10720#discussion_r2667021559


##########
nifi-framework-bundle/nifi-framework/nifi-framework-nar-loading-utils/src/test/java/org/apache/nifi/nar/AbstractTestNarLoader.java:
##########
@@ -53,15 +54,25 @@ public abstract class AbstractTestNarLoader {
 
     @BeforeEach
     public void setup() throws IOException, ClassNotFoundException {
-        deleteDir(getWorkDir());
-        deleteDir(getNarAutoloadDir());
-
-        final File extensionsDir = new File(getNarAutoloadDir());
-        assertTrue(extensionsDir.mkdirs());
+        Files.createDirectories(tempDir.resolve(getWorkDir()));
+        Files.createDirectories(tempDir.resolve(getNarAutoloadDir()));
 
         // Create NiFiProperties
-        final String propertiesFile = getPropertiesFile();
-        properties = NiFiProperties.createBasicNiFiProperties(propertiesFile, 
Collections.emptyMap());
+        final Path originalPropertiesFile = Paths.get(getPropertiesFile());
+        String modifiedPropertiesFileContent;
+        try (Stream<String> lines = Files.lines(originalPropertiesFile)) {
+            modifiedPropertiesFileContent = lines.filter(line -> 
line.startsWith(NiFiProperties.NAR_LIBRARY_AUTOLOAD_DIRECTORY)
+                            ||
+                            
line.startsWith(NiFiProperties.NAR_WORKING_DIRECTORY)
+                            ||
+                            
line.startsWith(NiFiProperties.NAR_LIBRARY_DIRECTORY))
+                    .map(line -> line.replaceFirst("\\./target", 
tempDir.toString()))
+                    .collect(Collectors.joining("\n"));
+        }
+
+        final Path newPropertiesFile = 
tempDir.resolve(originalPropertiesFile.getFileName());

Review Comment:
   Instead of loading and modifying the file, the Map of properties can be 
passed to `createBasicNiFiProperties`



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