Add junit test for text fields check

build.gradle

@@ -385,6 +385,7 @@ dependencies {
     testImplementation "org.testfx:testfx-core:4.0.16-alpha"
     testImplementation "org.testfx:testfx-junit5:4.0.16-alpha"
     testImplementation "org.hamcrest:hamcrest-library:3.0"
+    testImplementation "com.github.javaparser:javaparser-symbol-solver-core:3.26.2"
 
     // recommended by https://github.com/wiremock/wiremock/issues/2149#issuecomment-1835775954
     testImplementation 'org.wiremock:wiremock-standalone:3.3.1'

src/test/java/org/jabref/model/entry/field/FieldEditorsMultilinePropertyTest.java

@@ -0,0 +1,236 @@
+package org.jabref.model.entry.field;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.github.javaparser.JavaParser;
+import com.github.javaparser.ParserConfiguration;
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.ImportDeclaration;
+import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration;
+import com.github.javaparser.ast.body.FieldDeclaration;
+import com.github.javaparser.ast.body.MethodDeclaration;
+import com.github.javaparser.ast.expr.MethodCallExpr;
+import com.github.javaparser.ast.expr.ObjectCreationExpr;
+import com.github.javaparser.ast.stmt.IfStmt;
+import com.github.javaparser.ast.stmt.ReturnStmt;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class FieldEditorsMultilinePropertyTest {
+
+    private static final Pattern FIELD_PROPERTY_PATTERN = Pattern.compile("fieldProperties\\.contains\\s*\\(\\s*FieldProperty\\.(\\w+)\\s*\\)");
+    private static final Pattern STANDARD_FIELD_PATTERN = Pattern.compile("==\\s*StandardField\\.(\\w+)");
+    private static final Pattern INTERNAL_FIELD_PATTERN = Pattern.compile("==\\s*InternalField\\.(\\w+)");
+    private static JavaParser PARSER;
+
+    @BeforeAll
+    public static void setUp() {
+        ParserConfiguration configuration = new ParserConfiguration();
+        configuration.setLanguageLevel(ParserConfiguration.LanguageLevel.JAVA_21);
+        PARSER = new JavaParser(configuration);
+    }
+
+    /**
+     * This test is somewhat fragile, as it depends on the structure of FieldEditors.java.
+     * If the structure of FieldEditors.java is changed, this test might fail.
+     * This test performs the following steps:
+     * 1. Use Java parser to parse FieldEditors.java and check all if statements in the getForField method.
+     * 2. Match the conditions of if statements to extract the field properties.
+     * 3. Match the created FieldEditor class name with field properties extracted from step 2. This creates a map where:
+     *    - The key is the file path of the FieldEditor class (for example: ....UrlEditor.java)
+     *    - The value is the list of properties of the FieldEditor class (for example: [FieldProperty.EXTERNAL])
+     * 4. For every class in the map, when its properties contain MULTILINE_TEXT, check whether it:
+     *    a) Holds a TextInputControl field
+     *    b) Has an EditorTextArea object creation
+     */
+    @Test
+    public void fieldEditorsMatchMultilineProperty() throws Exception {
+        Map<Path, List<FieldProperty>> result = getEditorsWithPropertiesInFieldEditors();
+        for (Map.Entry<Path, List<FieldProperty>> entry : result.entrySet()) {
+            // Now we have the file path and its properties, going to analyze the target Editor class
+            Path filePath = entry.getKey();
+            List<FieldProperty> properties = entry.getValue();
+            CompilationUnit cu = PARSER.parse(filePath)
+                                       .getResult()
+                                       .orElseThrow(() ->
+                                               new NullPointerException("Failed to parse "
+                                                       + filePath
+                                                       + ", java parser returned null CompilationUnit"
+                                                       + ", please check if the file exists"));
+
+            if (!implementedFieldEditorFX(cu)) {
+                continue; // Make sure the class implements FieldEditorFX interface
+            }
+
+            if (properties.contains(FieldProperty.MULTILINE_TEXT)) {
+                // If the editor has MULTILINE_TEXT property, we are going to check if the class holds a `TextInputControl` field
+                // and have performed Text Area creation
+                assertTrue(holdTextInputControlField(cu) && hasEditorTextAreaCreationExisted(cu),
+                        "Class " + filePath + " should hold a TextInputControl field and have EditorTextArea creation");
+            }
+        }
+    }
+
+    /**
+     * Parse FieldEditors.java to get all field editors and their properties in function getForField
+     *
+     * @return a map of field editor file path and its properties
+     */
+    private static Map<Path, List<FieldProperty>> getEditorsWithPropertiesInFieldEditors() throws Exception {
+        final String filePath = "src/main/java/org/jabref/gui/fieldeditors/FieldEditors.java";
+        Map<Path, List<FieldProperty>> result = new HashMap<>();
+        CompilationUnit cu = PARSER.parse(Paths.get(filePath))
+                                   .getResult()
+                                   .orElseThrow(() ->
+                                           new NullPointerException("Failed to parse FieldEditors.java"));
+
+        // Locate getForField method in FieldEditors.java
+        MethodDeclaration getForFieldCall = cu.findAll(MethodDeclaration.class).stream()
+                .filter(methodDeclaration -> "getForField".equals(methodDeclaration.getNameAsString()))
+                .findFirst()
+                .orElseThrow(() -> new Exception("Failed to find getForField method in FieldEditors.java"));
+
+        // Analyze all if statements in getForField method
+        getForFieldCall.findAll(IfStmt.class).forEach(ifStmt -> {
+            String condition = ifStmt.getCondition().toString();
+            List<FieldProperty> properties = new ArrayList<>();
+            // Match `fieldProperties.contains(FieldProperty.XXX)`
+            Matcher propertyMatcher = FIELD_PROPERTY_PATTERN.matcher(condition);
+            while (propertyMatcher.find()) {
+                String propertyName = propertyMatcher.group(1);
+                FieldProperty property = FieldProperty.valueOf(propertyName);
+                properties.add(property);
+            }
+            // Match `== StandardField.XXX`
+            Matcher standardFieldMatcher = STANDARD_FIELD_PATTERN.matcher(condition);
+            if (standardFieldMatcher.find()) {
+                String fieldName = standardFieldMatcher.group(1);
+                StandardField standardField = StandardField.valueOf(fieldName);
+                properties.addAll(standardField.getProperties());
+            }
+            // Match `== InternalField.XXX`
+            Matcher internalFieldMatcher = INTERNAL_FIELD_PATTERN.matcher(condition);
+            if (internalFieldMatcher.find()) {
+                String fieldName = internalFieldMatcher.group(1);
+                InternalField internalField = InternalField.valueOf(fieldName);
+                properties.addAll(internalField.getProperties());
+            }
+
+            // Check if the return statement contains an object creation
+            // If so, extract the created class name and its path
+            ifStmt.getThenStmt().stream()
+                  .filter(ReturnStmt.class::isInstance)
+                  .map(ReturnStmt.class::cast)
+                  .findFirst()
+                  .flatMap(returnStmt ->
+                        // Try to find the object creation in the return statement
+                        returnStmt.stream()
+                            .filter(ObjectCreationExpr.class::isInstance)
+                            .map(ObjectCreationExpr.class::cast)
+                            .findFirst()).ifPresent(creationExpr -> {
+                                String createdClassName = creationExpr.getTypeAsString().replace("<>", "");
+                                cu.findAll(ImportDeclaration.class)
+                                    .stream()
+                                    .filter(importDeclaration -> importDeclaration.getNameAsString().endsWith(createdClassName))
+                                    .findFirst()
+                                    .ifPresentOrElse(importDeclaration -> {
+                                        String classPath = importDeclaration.getNameAsString();
+                                        Path classFilePath = Paths.get("src/main/java/" + classPath.replace(".", "/") + ".java");
+                                        result.put(classFilePath, properties);
+                                    }, () -> {
+                                        Path classFilePath = Paths.get("src/main/java/org/jabref/gui/fieldeditors/" + createdClassName + ".java");
+                                        result.put(classFilePath, properties);
+                                    });
+                            });
+        });
+
+        return result;
+    }
+
+    /**
+     * Check if the class implements FieldEditorFX interface
+     *
+     * @param cu CompilationUnit
+     * @return true if the class implements FieldEditorFX interface
+     */
+    private static boolean implementedFieldEditorFX(CompilationUnit cu) {
+        return cu.findAll(ClassOrInterfaceDeclaration.class).stream()
+                .anyMatch(classDecl -> classDecl.getImplementedTypes().stream()
+                        .anyMatch(type -> Objects.equals("FieldEditorFX", type.getNameAsString())));
+    }
+
+    /**
+     * Check if the class has a new EditorTextArea creation
+     *
+     * @param cu CompilationUnit
+     * @return true if the class has a new EditorTextArea creation
+     */
+    private static boolean hasEditorTextAreaCreationExisted(CompilationUnit cu) {
+        return cu.findAll(ObjectCreationExpr.class).stream()
+                .anyMatch(creation -> Objects.equals("EditorTextArea", creation.getType().toString()));
+    }
+
+    /**
+     * Check if the class holds a TextInputControl field
+     *
+     * @param cu CompilationUnit
+     * @return true if the class holds a TextInputControl field
+     */
+    private static boolean holdTextInputControlField(CompilationUnit cu) {
+        // Since the class implements FieldEditorFX, we are going to check the first parameter when call
+        // establishBinding method, which should be a TextInputControl
+        AtomicBoolean hasTextInputControlField = new AtomicBoolean(false);
+        cu.findAll(MethodCallExpr.class)
+                .stream()
+                .filter(methodCallExpr -> "establishBinding".equals(methodCallExpr.getNameAsString()))
+                .findFirst()
+                .ifPresent(methodCallExpr -> {
+                    if (!methodCallExpr.getArguments().isEmpty()) {
+                        String firstArgument = methodCallExpr.getArgument(0).toString();
+                        cu.findAll(FieldDeclaration.class)
+                                .stream()
+                                .filter(fieldDeclaration -> fieldDeclaration.getVariables().stream()
+                                        .anyMatch(variableDeclarator -> variableDeclarator.getNameAsString().equals(firstArgument)))
+                                .findFirst()
+                                .ifPresent(fieldDeclaration -> {
+                                    String classType = fieldDeclaration.getElementType().asString();
+                                    if ("TextInputControl".equals(classType)) {
+                                        hasTextInputControlField.set(true);
+                                    }
+                                });
+                    }
+                });
+        return hasTextInputControlField.get();
+    }
+
+    private static boolean holdEditorTextField(CompilationUnit compilationUnit) {
+        AtomicBoolean hasEditorTextField = new AtomicBoolean(false);
+        compilationUnit.findAll(MethodCallExpr.class).stream()
+                .filter(methodCallExpr -> "establishBinding".equals(methodCallExpr.getNameAsString()))
+                .findFirst()
+                .ifPresent(establishBindingCall -> {
+                    String firstArg = establishBindingCall.getArgument(0).toString();
+                    compilationUnit.findAll(FieldDeclaration.class).stream()
+                            .filter(field -> field.getVariable(0).getNameAsString().equals(firstArg))
+                            .findFirst()
+                            .ifPresent(fieldDeclaration -> {
+                                String fieldType = fieldDeclaration.getElementType().asString();
+                                if ("EditorTextField".equals(fieldType)) {
+                                    hasEditorTextField.set(true);
+                                }
+                            });
+                });
+        return hasEditorTextField.get();
+    }
+}