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"""
Java edge cases parsing and relationship testing.
Tests Java-specific edge cases like empty classes/interfaces, single-line vs multi-line constructs,
Unicode identifiers, long qualified names, deeply nested generics, and parsing edge cases specific to Java syntax.
"""
from pathlib import Path
from unittest.mock import MagicMock
import pytest
from codebase_rag.graph_updater import GraphUpdater
from codebase_rag.parser_loader import load_parsers
@pytest.fixture
def java_edge_cases_project(temp_repo: Path) -> Path:
"""Create a Java project structure for edge case testing."""
project_path = temp_repo / "java_edge_cases"
project_path.mkdir()
# Create standard Java project structure
(project_path / "src").mkdir()
(project_path / "src" / "main").mkdir()
(project_path / "src" / "main" / "java").mkdir()
(project_path / "src" / "main" / "java" / "com").mkdir()
(project_path / "src" / "main" / "java" / "com" / "example").mkdir()
return project_path
def test_empty_classes_and_interfaces(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of empty classes and interfaces."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "EmptyTypes.java"
)
test_file.write_text(
"""
package com.example;
// Completely empty class
public class EmptyClass {
}
// Empty class with just whitespace
public class WhitespaceClass {
}
// Empty interface
public interface EmptyInterface {
}
// Empty abstract class
public abstract class EmptyAbstractClass {
}
// Empty enum
public enum EmptyEnum {
}
// Empty annotation
public @interface EmptyAnnotation {
}
// Minimal classes with single elements
public class SingleFieldClass {
private int field;
}
public class SingleMethodClass {
public void method() {}
}
public class SingleConstructorClass {
public SingleConstructorClass() {}
}
// Interface with only default methods (effectively empty behavior)
public interface DefaultOnlyInterface {
default void defaultMethod() {}
}
// Class with only static elements
public class StaticOnlyClass {
public static final String CONSTANT = "value";
public static void staticMethod() {}
}
// Abstract class with only abstract methods
public abstract class AbstractOnlyClass {
public abstract void abstractMethod();
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify all empty types were detected
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
interface_calls = [call for call in all_calls if call[0][0] == "Interface"]
enum_calls = [call for call in all_calls if call[0][0] == "Enum"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
created_interfaces = {call[0][1]["qualified_name"] for call in interface_calls}
{call[0][1]["qualified_name"] for call in enum_calls}
# Verify at least some empty structures were detected
assert len(created_classes) >= 5, "Should detect multiple empty classes"
assert len(created_interfaces) >= 1, "Should detect empty interfaces"
def test_single_line_vs_multiline_constructs(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of single-line vs multi-line Java constructs."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "LineFormats.java"
)
test_file.write_text(
"""
package com.example;
// Single-line class
public class SingleLineClass { private int x; public int getX() { return x; } }
// Multi-line equivalent
public class MultiLineClass {
private int x;
public int getX() {
return x;
}
}
// Single-line interface
public interface SingleLineInterface { void method(); default void defaultMethod() { System.out.println("default"); } }
// Multi-line equivalent
public interface MultiLineInterface {
void method();
default void defaultMethod() {
System.out.println("default");
}
}
// Single-line enum
public enum SingleLineEnum { VALUE1, VALUE2, VALUE3; }
// Multi-line enum
public enum MultiLineEnum {
VALUE1,
VALUE2,
VALUE3;
}
// Single-line method chains
public class MethodChains {
public String singleLineChain() { return "test".toUpperCase().trim().substring(1); }
public String multiLineChain() {
return "test"
.toUpperCase()
.trim()
.substring(1);
}
}
// Single-line generics vs multi-line
public class GenericFormats<T> {
public <U, V> Map<U, List<V>> singleLineGeneric() { return new HashMap<>(); }
public <U, V> Map<U, List<V>> multiLineGeneric() {
return new HashMap<>();
}
}
// Single-line lambda vs multi-line
public class LambdaFormats {
public void singleLineLambda() {
List<String> list = Arrays.asList("a", "b", "c");
list.forEach(s -> System.out.println(s));
}
public void multiLineLambda() {
List<String> list = Arrays.asList("a", "b", "c");
list.forEach(s -> {
System.out.println("Processing: " + s);
});
}
}
// Compressed vs expanded array initializations
public class ArrayFormats {
private int[] singleLineArray = {1, 2, 3, 4, 5};
private int[] multiLineArray = {
1,
2,
3,
4,
5
};
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify both single-line and multi-line formats are parsed correctly
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
interface_calls = [call for call in all_calls if call[0][0] == "Interface"]
enum_calls = [call for call in all_calls if call[0][0] == "Enum"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
created_interfaces = {call[0][1]["qualified_name"] for call in interface_calls}
{call[0][1]["qualified_name"] for call in enum_calls}
# Should detect both single-line and multi-line versions
assert any("SingleLineClass" in qn for qn in created_classes)
assert any("MultiLineClass" in qn for qn in created_classes)
assert any("SingleLineInterface" in qn for qn in created_interfaces)
assert any("MultiLineInterface" in qn for qn in created_interfaces)
def test_unicode_identifiers(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of Unicode identifiers in Java."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "UnicodeIdentifiers.java"
)
test_file.write_text(
"""
package com.example;
// Classes with Unicode names
public class Классический {
private String название;
public String getНазвание() {
return название;
}
}
public class 中文类 {
private int 数字;
public void 设置数字(int 值) {
this.数字 = 值;
}
}
// Interface with Unicode name
public interface インターフェース {
void メソッド();
}
// Enum with Unicode values
public enum Цвета {
КРАСНЫЙ, ЗЕЛЕНЫЙ, СИНИЙ;
}
// Arabic identifiers
public class العربية {
private String النص;
public String الحصولعلىالنص() {
return النص;
}
}
// Mixed Unicode and ASCII
public class MixedUnicode混合 {
private String englishField;
private String 中文字段;
private String русскоеПоле;
public void processТекст(String input) {
System.out.println("Processing: " + input);
}
}
// Unicode in method parameters and return types
public class UnicodeParameters {
public Map<String, Список> createМап() {
return new HashMap<>();
}
public void process参数(String 名字, int 年龄, boolean активный) {
// Implementation
}
}
// Generic class with Unicode type parameters
public class Container<Т> {
private Т значение;
public Т getЗначение() {
return значение;
}
public void setЗначение(Т значение) {
this.значение = значение;
}
}
// Custom type using Unicode
class Список extends java.util.ArrayList<String> {
public void добавить(String элемент) {
add(элемент);
}
}
// Constants with Unicode names
public class UnicodeConstants {
public static final String МАКСИМУМ = "max";
public static final int 最大值 = 100;
public static final double π = 3.14159;
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify Unicode identifiers are handled (may depend on parser capabilities)
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
# At minimum, should detect some Unicode-named classes
assert len(created_classes) >= 3, "Should detect classes with Unicode names"
def test_long_qualified_names(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of very long qualified names and deep package structures."""
# Create deep package structure
deep_path = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "very"
/ "deep"
/ "package"
/ "structure"
/ "with"
/ "many"
/ "levels"
)
deep_path.mkdir(parents=True)
test_file = deep_path / "VeryLongQualifiedNames.java"
test_file.write_text(
"""
package com.example.very.deep.package.structure.with.many.levels;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.BiFunction;
public class VeryLongQualifiedNamesWithExtremelyDescriptiveClassNameThatExceedsNormalLengthLimitations {
private Map<String, List<Set<Optional<ComplexNestedGenericTypeWithVeryLongNameThatTestsParsingLimits>>>>
extremelyLongFieldNameThatTestsFieldNameLengthLimitationsInJavaCode;
public VeryLongMethodNameThatTestsMethodNameLengthLimitationsAndParsingCapabilitiesOfTheSystem
createVeryLongMethodNameThatReturnsComplexType() {
return new VeryLongMethodNameThatTestsMethodNameLengthLimitationsAndParsingCapabilitiesOfTheSystem();
}
public <VeryLongTypeParameterNameThatTestsGenericTypeParameterLengthLimitations,
AnotherVeryLongTypeParameterNameForTestingPurposes,
YetAnotherExtremelyLongTypeParameterNameToTestParsingLimits>
Map<VeryLongTypeParameterNameThatTestsGenericTypeParameterLengthLimitations,
List<AnotherVeryLongTypeParameterNameForTestingPurposes>>
processVeryLongGenericMethodWithExtremelyLongParameterNames(
VeryLongTypeParameterNameThatTestsGenericTypeParameterLengthLimitations firstParameterWithVeryLongName,
AnotherVeryLongTypeParameterNameForTestingPurposes secondParameterWithEvenLongerName,
YetAnotherExtremelyLongTypeParameterNameToTestParsingLimits thirdParameterWithExtremelyLongName
) {
return new HashMap<>();
}
// Nested class with long name
public static class NestedClassWithVeryLongNameThatTestsNestedClassNameLengthLimitations {
// Inner class with even longer name
public class InnerClassWithExtremelyLongNameThatTestsInnerClassNameLengthLimitationsAndParsingCapabilities {
private String fieldWithVeryLongNameThatTestsFieldNameLengthLimitationsInNestedClasses;
public void methodWithVeryLongNameThatTestsMethodNameLengthLimitationsInInnerClasses() {
// Implementation
}
}
}
}
// Another class with different long pattern
class ComplexNestedGenericTypeWithVeryLongNameThatTestsParsingLimits {
// Implementation
}
class VeryLongMethodNameThatTestsMethodNameLengthLimitationsAndParsingCapabilitiesOfTheSystem {
// Implementation
}
// Interface with long name
interface InterfaceWithVeryLongNameThatTestsInterfaceNameLengthLimitationsAndParsingCapabilities {
void methodWithVeryLongNameInInterface();
}
// Enum with long name
enum EnumWithVeryLongNameThatTestsEnumNameLengthLimitationsAndParsingCapabilities {
VALUE_WITH_VERY_LONG_NAME_THAT_TESTS_ENUM_VALUE_LENGTH_LIMITATIONS,
ANOTHER_VALUE_WITH_EVEN_LONGER_NAME_FOR_TESTING_PURPOSES,
YET_ANOTHER_VALUE_WITH_EXTREMELY_LONG_NAME_TO_TEST_PARSING_LIMITS;
}
// Annotation with long name
@interface AnnotationWithVeryLongNameThatTestsAnnotationNameLengthLimitationsAndParsingCapabilities {
String valueWithVeryLongNameThatTestsAnnotationValueNameLengthLimitations() default "";
int priorityWithLongNameForTestingPurposes() default 0;
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify long qualified names are parsed correctly
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
# Should handle long qualified names
long_class_found = any(
"VeryLongQualifiedNamesWithExtremelyDescriptive" in qn for qn in created_classes
)
assert long_class_found, "Should detect classes with very long names"
def test_deeply_nested_generics(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of deeply nested generic types."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "DeeplyNestedGenerics.java"
)
test_file.write_text(
"""
package com.example;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
public class DeeplyNestedGenerics {
// Level 1: Simple generic
private List<String> simpleList;
// Level 2: Nested generic
private Map<String, List<Integer>> mapOfLists;
// Level 3: Triple nested
private Map<String, List<Set<String>>> mapOfListsOfSets;
// Level 4: Quadruple nested
private Map<String, List<Set<Map<Integer, String>>>> mapOfListsOfSetsOfMaps;
// Level 5: Quintuple nested
private Map<String, List<Set<Map<Integer, List<String>>>>> mapOfListsOfSetsOfMapsOfLists;
// Level 6: Sextuple nested with wildcards
private Map<String, List<Set<Map<Integer, List<? extends Collection<? super String>>>>>>
extremelyNestedWithWildcards;
// Level 7: Maximum nesting with complex bounds
private Map<String,
List<Set<
Map<Integer,
List<? extends Collection<
? super Map<String,
List<? extends Comparable<? super String>>>>>>>>>
maximumNestingLevel;
// Nested generics with type bounds
public <T extends Comparable<T>,
U extends Collection<? extends T>,
V extends Map<? super T, ? extends U>>
Optional<Map<String, List<Set<V>>>> processComplexBounds(V input) {
return Optional.empty();
}
// Recursive generic bounds with deep nesting
public static class RecursiveContainer<T extends RecursiveContainer<T>> {
private Map<String, List<Optional<T>>> children;
public <U extends RecursiveContainer<U> & Comparable<U>>
Map<String, List<Set<Optional<U>>>> createNestedStructure() {
return new HashMap<>();
}
}
// Function types with deep nesting
private Function<
Map<String, List<Integer>>,
BiFunction<
Set<String>,
Predicate<Map<Integer, String>>,
Optional<List<Set<Map<String, Integer>>>>
>
> complexFunctionType;
// Array types with nested generics
private List<String>[] arrayOfGenericLists;
private Map<String, Integer>[][] twoDimensionalArrayOfMaps;
private Set<List<Map<String, Integer>>>[] arrayOfNestedGenerics;
// Method with extreme generic complexity
public <A, B extends Collection<A>, C extends Map<A, B>>
CompletableFuture<Optional<Map<String, List<Set<C>>>>>
processExtremeGenerics(
Supplier<? extends Map<A, ? extends B>> supplier,
Function<? super B, ? extends C> mapper,
BiPredicate<? super A, ? super C> filter
) {
return CompletableFuture.completedFuture(Optional.empty());
}
// Nested class with its own complex generics
public static class NestedGenericClass<
T extends Map<String, ? extends List<? super Integer>>,
U extends Collection<? extends T>
> {
private Map<String, List<Set<Optional<T>>>> nestedField;
public <V extends Comparable<V> & Serializable>
Stream<Map<V, List<Set<Optional<U>>>>> complexNestedMethod() {
return Stream.empty();
}
}
// Generic inheritance chain
public static class GenericBase<T> {
protected T value;
}
public static class GenericMiddle<T, U extends Collection<T>> extends GenericBase<Map<String, U>> {
// Inherits complex generic type
}
public static class GenericDerived extends GenericMiddle<String, List<String>> {
// Final concrete implementation of deeply nested generic chain
}
// Wildcard variance with deep nesting
public void varianceExample(
List<? extends Map<String, ? extends Collection<? extends Number>>> input,
List<? super Map<String, ? super Collection<? super Integer>>> output
) {
// Complex variance relationships
}
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify deeply nested generics are parsed
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
# Should detect main class and nested classes
assert any("DeeplyNestedGenerics" in qn for qn in created_classes)
def test_parsing_edge_cases_syntax(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of Java syntax edge cases."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "SyntaxEdgeCases.java"
)
test_file.write_text(
"""
package com.example;
import static java.lang.Math.*;
import static java.util.Collections.EMPTY_LIST;
public class SyntaxEdgeCases {
// Unicode escape sequences in identifiers
private String unicode\\u0046ield = "field";
// Method with unicode escapes
public void method\\u0057ithUnicode() {
// Implementation
}
// Numeric literals edge cases
private int binary = 0b1010_1111_0000_1111;
private int hex = 0xFF_FF_FF_FF;
private long longWithUnderscore = 1_000_000_000L;
private double scientific = 1.23e-4;
private float floatLiteral = 3.14f;
// String literal edge cases
private String emptyString = "";
private String stringWithEscapes = "line1\\nline2\\ttab\\rreturn\\\\backslash\\"quote";
private String unicodeString = "\\u0048\\u0065\\u006c\\u006c\\u006f"; // "Hello"
// Character literals
private char singleQuote = '\\'';
private char backslash = '\\\\';
private char tab = '\\t';
private char unicodeChar = '\\u0041'; // 'A'
// Complex array declarations
private int[] simpleArray;
private int simpleArray2[];
private int[][] twoDArray;
private int[] twoDArray2[];
private int[][][] threeDArray;
// Generic array edge cases
private List<String>[] genericArray;
private Map<String, Integer>[] mapArray;
// Varargs edge cases
public void varargs(String... args) {}
public void multipleParams(int x, String... args) {}
public <T> void genericVarargs(T... args) {}
// Method reference edge cases
private Supplier<String> methodRef1 = String::new;
private Function<String, Integer> methodRef2 = String::length;
private BiFunction<String, String, String> methodRef3 = String::concat;
private Consumer<String> methodRef4 = System.out::println;
// Lambda edge cases
private Runnable emptyLambda = () -> {};
private Consumer<String> singleParamLambda = s -> System.out.println(s);
private Consumer<String> singleParamWithParens = (s) -> System.out.println(s);
private BiFunction<Integer, Integer, Integer> multiParam = (a, b) -> a + b;
// Complex lambda with type annotations
private BiFunction<String, String, String> typedLambda =
(String s1, String s2) -> s1 + s2;
// Lambda with block body
private Function<String, String> blockLambda = s -> {
String result = s.toUpperCase();
return result.trim();
};
// Anonymous class edge cases
private Runnable anonymousRunnable = new Runnable() {
@Override
public void run() {
System.out.println("Running");
}
};
// Generic anonymous class
private Comparator<String> anonymousComparator = new Comparator<String>() {
@Override
public int compare(String s1, String s2) {
return s1.length() - s2.length();
}
};
// Nested anonymous classes
private Supplier<Runnable> nestedAnonymous = new Supplier<Runnable>() {
@Override
public Runnable get() {
return new Runnable() {
@Override
public void run() {
System.out.println("Nested anonymous");
}
};
}
};
// Complex initialization blocks
{
// Instance initialization block
System.out.println("Instance init");
}
static {
// Static initialization block
System.out.println("Static init");
}
// Constructor with complex parameter list
public SyntaxEdgeCases(
String param1,
int param2,
List<? extends String> param3,
Map<String, ? super Integer> param4,
Function<String, Integer>... param5
) {
// Constructor body
}
// Method with throws clause
public void methodWithExceptions()
throws IllegalArgumentException,
IllegalStateException,
RuntimeException {
// Implementation
}
// Generic method with complex bounds
public <T extends Comparable<T> & Serializable & Cloneable>
Optional<T> complexGenericMethod(T input)
throws IllegalArgumentException {
return Optional.ofNullable(input);
}
// Annotation edge cases
@SuppressWarnings({"unchecked", "rawtypes"})
@Deprecated
public void annotatedMethod() {
// Implementation
}
// Annotation with array values
@MyAnnotation(values = {"a", "b", "c"}, numbers = {1, 2, 3})
public void arrayAnnotation() {
// Implementation
}
}
// Annotation definition
@interface MyAnnotation {
String[] values() default {};
int[] numbers() default {};
}
// Class with complex inheritance
class ComplexInheritance
extends java.util.AbstractList<String>
implements java.util.List<String>,
java.lang.Cloneable,
java.io.Serializable {
@Override
public String get(int index) {
return null;
}
@Override
public int size() {
return 0;
}
}
"""
)
parsers, queries = load_parsers()
if "java" not in parsers:
pytest.skip("Java parser not available")
updater = GraphUpdater(
ingestor=mock_ingestor,
repo_path=java_edge_cases_project,
parsers=parsers,
queries=queries,
)
updater.run()
# Verify syntax edge cases are parsed correctly
all_calls = mock_ingestor.ensure_node_batch.call_args_list
class_calls = [call for call in all_calls if call[0][0] == "Class"]
created_classes = {call[0][1]["qualified_name"] for call in class_calls}
assert any("SyntaxEdgeCases" in qn for qn in created_classes)
def test_malformed_but_valid_syntax(
java_edge_cases_project: Path,
mock_ingestor: MagicMock,
) -> None:
"""Test parsing of syntactically valid but unusual Java code."""
test_file = (
java_edge_cases_project
/ "src"
/ "main"
/ "java"
/ "com"
/ "example"
/ "MalformedButValid.java"
)
test_file.write_text(
"""
package
com
.
example
;
import
java
.
util
.
*
;
public
class
MalformedButValid
{
private
int
field
;
public
MalformedButValid
(
)
{
}
public
void
method
(
)
{
int
x
=
5
;
if
(
x
>
0
)
{
System
.
out
.
println
(
"positive"
)
;
}
}
public
<
T
>
void
genericMethod
(
T
parameter
)
{
// Implementation
}
}
// Class with excessive spacing
public class ExcessiveSpacing {
private String field ;
public void method ( String param ) {
// Implementation
}
}
// Class with minimal spacing
public class MinimalSpacing{private String field;public void method(String param){}}
// Unusual but valid generic syntax
class WeirdGenerics<T,U,V> {
private Map<String,List<T>> field1;
private Set<Map<U,V>> field2;