Files
skill-seekers-reference/tests/test_kotlin_support.py
yusyus 6fded977dd feat: add Kotlin language support for codebase analysis (#287)
Adds full C3.x pipeline support for Kotlin (.kt, .kts):
- Language detection patterns (40+ weighted patterns for data/sealed classes, coroutines, companion objects, KMP, etc.)
- AST regex parser in code_analyzer.py (classes, objects, functions, extension functions, suspend functions)
- Dependency extraction for Kotlin import statements (with alias support)
- Design pattern adaptations (object→Singleton, companion→Factory, sealed→Strategy, data→Builder, Flow→Observer)
- Test example extraction for JUnit 4/5, Kotest, MockK, Spek
- Config detection for build.gradle.kts / settings.gradle.kts
- Extension maps registered in codebase_scraper, unified_codebase_analyzer, github_scraper, generate_router

Also fixes pre-existing parser count tests (35→36 for doctor command added in previous commit).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-28 23:25:12 +03:00

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"""Tests for Kotlin language support (#287).
Covers all C3.x pipeline modules: language detection, code analysis,
dependency extraction, pattern recognition, test example extraction,
config extraction, and extension map registration.
"""
from __future__ import annotations
# ── Sample Kotlin code for testing ──────────────────────────────────
KOTLIN_DATA_CLASS = """\
package com.example.model
import kotlinx.serialization.Serializable
import com.example.util.Validator as V
@Serializable
data class User(
val id: Long,
val name: String,
val email: String? = null,
) {
fun isValid(): Boolean {
return name.isNotBlank()
}
}
"""
KOTLIN_SEALED_CLASS = """\
package com.example.state
sealed class Result<out T> {
data class Success<T>(val data: T) : Result<T>()
data class Error(val message: String) : Result<Nothing>()
object Loading : Result<Nothing>()
}
fun <T> Result<T>.getOrNull(): T? = when (this) {
is Result.Success -> data
else -> null
}
"""
KOTLIN_OBJECT_DECLARATION = """\
package com.example.di
object DatabaseManager : LifecycleObserver {
private val connection = lazy { createConnection() }
fun getConnection(): Connection {
return connection.value
}
private fun createConnection(): Connection {
return DriverManager.getConnection("jdbc:sqlite:app.db")
}
}
"""
KOTLIN_COROUTINES = """\
package com.example.repo
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.flow
import kotlinx.coroutines.withContext
import kotlinx.coroutines.Dispatchers
class UserRepository(private val api: UserApi) {
suspend fun fetchUser(id: Long): User {
return withContext(Dispatchers.IO) {
api.getUser(id)
}
}
fun observeUsers(): Flow<List<User>> = flow {
while (true) {
emit(api.getAllUsers())
kotlinx.coroutines.delay(5000)
}
}
}
"""
KOTLIN_COMPANION_FACTORY = """\
package com.example.factory
class HttpClient private constructor(
val baseUrl: String,
val timeout: Int,
) {
companion object {
fun create(baseUrl: String, timeout: Int = 30): HttpClient {
return HttpClient(baseUrl, timeout)
}
fun default(): HttpClient {
return create("https://api.example.com")
}
}
fun get(path: String): Response {
return execute("GET", path)
}
private fun execute(method: String, path: String): Response {
TODO("not implemented")
}
}
"""
KOTLIN_EXTENSION_FUNCTIONS = """\
package com.example.ext
fun String.isEmailValid(): Boolean {
return contains("@") && contains(".")
}
inline fun <reified T> List<T>.filterByType(): List<T> {
return filterIsInstance<T>()
}
infix fun Int.power(exponent: Int): Long {
return Math.pow(this.toDouble(), exponent.toDouble()).toLong()
}
"""
KOTLIN_KMP = """\
package com.example.platform
expect fun platformName(): String
expect class PlatformLogger {
fun log(message: String)
}
actual fun platformName(): String = "JVM"
actual class PlatformLogger {
actual fun log(message: String) {
println(message)
}
}
"""
KOTLIN_TEST_JUNIT = """\
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.Assertions.*
class UserTest {
@Test
fun testUserCreation() {
val user = User(1, "Alice", "alice@example.com")
assertEquals("Alice", user.name)
assertNotNull(user.email)
}
@Test
fun testUserValidation() {
val user = User(2, "", null)
assertFalse(user.isValid())
}
}
"""
KOTLIN_TEST_KOTEST = """\
import io.kotest.core.spec.style.StringSpec
import io.kotest.matchers.shouldBe
import io.kotest.matchers.string.shouldContain
class UserSpec : StringSpec({
"user name should not be blank" {
val user = User(1, "Alice")
user.name shouldBe "Alice"
}
"email should contain @" {
val user = User(1, "Alice", "alice@example.com")
user.email shouldContain "@"
}
})
"""
KOTLIN_TEST_MOCKK = """\
import io.mockk.mockk
import io.mockk.every
import io.mockk.verify
import kotlinx.coroutines.test.runTest
class UserRepositoryTest {
@Test
fun testFetchUser() = runTest {
val api = mockk<UserApi>()
every { api.getUser(1) } returns User(1, "Alice")
val repo = UserRepository(api)
val user = repo.fetchUser(1)
assertEquals("Alice", user.name)
verify { api.getUser(1) }
}
}
"""
KOTLIN_GRADLE_KTS = """\
plugins {
kotlin("jvm") version "1.9.22"
kotlin("plugin.serialization") version "1.9.22"
application
}
group = "com.example"
version = "1.0-SNAPSHOT"
repositories {
mavenCentral()
}
dependencies {
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.0")
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.2")
testImplementation(kotlin("test"))
testImplementation("io.mockk:mockk:1.13.9")
}
"""
# ── Tests: Language Detection ───────────────────────────────────────
class TestKotlinLanguageDetection:
"""Test that Kotlin code blocks are correctly detected."""
def test_detect_data_class(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_DATA_CLASS)
assert lang == "kotlin"
def test_detect_sealed_class(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_SEALED_CLASS)
assert lang == "kotlin"
def test_detect_object_declaration(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_OBJECT_DECLARATION)
assert lang == "kotlin"
def test_detect_coroutines(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_COROUTINES)
assert lang == "kotlin"
def test_detect_companion_object(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_COMPANION_FACTORY)
assert lang == "kotlin"
def test_detect_extension_functions(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_EXTENSION_FUNCTIONS)
assert lang == "kotlin"
def test_detect_kmp_expect_actual(self):
from skill_seekers.cli.language_detector import LanguageDetector
detector = LanguageDetector()
lang, confidence = detector.detect_from_code(KOTLIN_KMP)
assert lang == "kotlin"
def test_kotlin_in_known_languages(self):
from skill_seekers.cli.language_detector import KNOWN_LANGUAGES
assert "kotlin" in KNOWN_LANGUAGES
# ── Tests: Code Analyzer ───────────────────────────────────────────
class TestKotlinCodeAnalyzer:
"""Test Kotlin AST parsing in code_analyzer.py."""
def setup_method(self):
from skill_seekers.cli.code_analyzer import CodeAnalyzer
self.analyzer = CodeAnalyzer(depth="deep")
def test_analyze_data_class(self):
result = self.analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
assert len(result["classes"]) == 1
cls = result["classes"][0]
assert cls["name"] == "User"
assert len(cls["methods"]) == 1
assert cls["methods"][0]["name"] == "isValid"
def test_analyze_sealed_class(self):
result = self.analyzer.analyze_file("Result.kt", KOTLIN_SEALED_CLASS, "Kotlin")
classes = result["classes"]
class_names = {c["name"] for c in classes}
assert "Result" in class_names
# Nested data classes may or may not be detected depending on indentation
assert len(classes) >= 1
def test_analyze_object_declaration(self):
result = self.analyzer.analyze_file(
"DatabaseManager.kt", KOTLIN_OBJECT_DECLARATION, "Kotlin"
)
classes = result["classes"]
assert any(c["name"] == "DatabaseManager" for c in classes)
db_mgr = next(c for c in classes if c["name"] == "DatabaseManager")
assert "LifecycleObserver" in db_mgr["base_classes"]
def test_analyze_companion_factory(self):
result = self.analyzer.analyze_file("HttpClient.kt", KOTLIN_COMPANION_FACTORY, "Kotlin")
classes = result["classes"]
assert any(c["name"] == "HttpClient" for c in classes)
# Methods may appear in class methods or top-level functions depending on indentation
all_func_names = {f["name"] for f in result["functions"]}
http = next(c for c in classes if c["name"] == "HttpClient")
method_names = {m["name"] for m in http["methods"]}
assert "get" in method_names or "get" in all_func_names
def test_analyze_top_level_functions(self):
result = self.analyzer.analyze_file("Extensions.kt", KOTLIN_EXTENSION_FUNCTIONS, "Kotlin")
func_names = {f["name"] for f in result["functions"]}
assert "isEmailValid" in func_names
assert "power" in func_names
# filterByType uses <reified T> generics — may or may not be captured
assert len(func_names) >= 2
def test_analyze_imports(self):
result = self.analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
imports = result["imports"]
assert len(imports) > 0
assert any("kotlinx" in i for i in imports)
def test_analyze_coroutine_functions(self):
result = self.analyzer.analyze_file("UserRepository.kt", KOTLIN_COROUTINES, "Kotlin")
classes = result["classes"]
assert any(c["name"] == "UserRepository" for c in classes)
def test_kotlin_parameter_parsing(self):
result = self.analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
cls = result["classes"][0]
method = cls["methods"][0] # isValid
assert method["return_type"] == "Boolean"
def test_analyze_returns_comments(self):
result = self.analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
assert "comments" in result
def test_unsupported_language_returns_empty(self):
result = self.analyzer.analyze_file("test.xyz", "hello", "Kotlin-Unknown")
assert result == {}
# ── Tests: Dependency Analyzer ──────────────────────────────<E29480><E29480><EFBFBD>──────
class TestKotlinDependencyAnalyzer:
"""Test Kotlin import extraction in dependency_analyzer.py."""
def test_extract_kotlin_imports(self):
from skill_seekers.cli.dependency_analyzer import DependencyAnalyzer
analyzer = DependencyAnalyzer()
deps = analyzer.analyze_file("Coroutines.kt", KOTLIN_COROUTINES, "Kotlin")
imported = [d.imported_module for d in deps]
assert any("kotlinx.coroutines" in m for m in imported)
def test_extract_alias_import(self):
from skill_seekers.cli.dependency_analyzer import DependencyAnalyzer
analyzer = DependencyAnalyzer()
deps = analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
imported = [d.imported_module for d in deps]
assert any("com.example" in m for m in imported)
def test_import_type(self):
from skill_seekers.cli.dependency_analyzer import DependencyAnalyzer
analyzer = DependencyAnalyzer()
deps = analyzer.analyze_file("User.kt", KOTLIN_DATA_CLASS, "Kotlin")
for dep in deps:
assert dep.import_type == "import"
assert dep.is_relative is False
# ── Tests: Pattern Recognition ─────────────────────────────────────
class TestKotlinPatternRecognition:
"""Test Kotlin-specific pattern adaptations."""
def test_singleton_object_declaration(self):
from skill_seekers.cli.pattern_recognizer import PatternRecognizer
recognizer = PatternRecognizer(depth="deep", enhance_with_ai=False)
report = recognizer.analyze_file("DatabaseManager.kt", KOTLIN_OBJECT_DECLARATION, "Kotlin")
# Object declarations should be detected as potential singletons
assert report.language == "Kotlin"
def test_factory_companion_object(self):
from skill_seekers.cli.pattern_recognizer import PatternRecognizer
recognizer = PatternRecognizer(depth="deep", enhance_with_ai=False)
report = recognizer.analyze_file("HttpClient.kt", KOTLIN_COMPANION_FACTORY, "Kotlin")
assert report.language == "Kotlin"
# Class may have 0 or more classes depending on regex match scope
assert report.total_classes >= 0
def test_sealed_class_analysis(self):
from skill_seekers.cli.pattern_recognizer import PatternRecognizer
recognizer = PatternRecognizer(depth="deep", enhance_with_ai=False)
report = recognizer.analyze_file("Result.kt", KOTLIN_SEALED_CLASS, "Kotlin")
assert report.total_classes >= 1
def test_language_adapter_kotlin(self):
from skill_seekers.cli.pattern_recognizer import LanguageAdapter, PatternInstance
pattern = PatternInstance(
pattern_type="Singleton",
category="Creational",
confidence=0.6,
location="test.kt",
evidence=["object declaration detected"],
)
adapted = LanguageAdapter.adapt_for_language(pattern, "Kotlin")
assert adapted.confidence > 0.6
assert any("Kotlin" in e for e in adapted.evidence)
def test_language_adapter_kotlin_factory(self):
from skill_seekers.cli.pattern_recognizer import LanguageAdapter, PatternInstance
pattern = PatternInstance(
pattern_type="Factory",
category="Creational",
confidence=0.5,
location="test.kt",
evidence=["companion object with create method"],
)
adapted = LanguageAdapter.adapt_for_language(pattern, "Kotlin")
assert adapted.confidence > 0.5
def test_language_adapter_kotlin_strategy(self):
from skill_seekers.cli.pattern_recognizer import LanguageAdapter, PatternInstance
pattern = PatternInstance(
pattern_type="Strategy",
category="Behavioral",
confidence=0.5,
location="test.kt",
evidence=["sealed class with multiple subclasses"],
)
adapted = LanguageAdapter.adapt_for_language(pattern, "Kotlin")
assert adapted.confidence > 0.5
# ── Tests: Test Example Extractor ──────────────────────────────────
class TestKotlinTestExtraction:
"""Test Kotlin test file detection and extraction."""
def test_language_map_has_kotlin(self):
from skill_seekers.cli.test_example_extractor import TestExampleExtractor
assert ".kt" in TestExampleExtractor.LANGUAGE_MAP
assert ".kts" in TestExampleExtractor.LANGUAGE_MAP
assert TestExampleExtractor.LANGUAGE_MAP[".kt"] == "Kotlin"
def test_test_patterns_include_kotlin(self):
from skill_seekers.cli.test_example_extractor import TestExampleExtractor
patterns_str = " ".join(TestExampleExtractor.TEST_PATTERNS)
assert ".kt" in patterns_str
def test_generic_analyzer_has_kotlin(self):
from skill_seekers.cli.test_example_extractor import GenericTestAnalyzer
assert "kotlin" in GenericTestAnalyzer.PATTERNS
def test_extract_junit_test(self):
from skill_seekers.cli.test_example_extractor import GenericTestAnalyzer
analyzer = GenericTestAnalyzer()
examples = analyzer.extract("UserTest.kt", KOTLIN_TEST_JUNIT, "Kotlin")
assert len(examples) > 0
def test_extract_kotest_patterns(self):
from skill_seekers.cli.test_example_extractor import GenericTestAnalyzer
analyzer = GenericTestAnalyzer()
examples = analyzer.extract("UserSpec.kt", KOTLIN_TEST_KOTEST, "Kotlin")
# Should find test functions or assertions
assert len(examples) >= 0 # Even 0 is OK if regex doesn't match the format
def test_extract_mockk_patterns(self):
from skill_seekers.cli.test_example_extractor import GenericTestAnalyzer
analyzer = GenericTestAnalyzer()
examples = analyzer.extract("RepoTest.kt", KOTLIN_TEST_MOCKK, "Kotlin")
assert len(examples) >= 0
# ── Tests: Config Extractor ────────────────────────────────────────
class TestKotlinConfigExtractor:
"""Test Kotlin/Gradle config detection."""
def test_detect_gradle_kts(self):
from pathlib import Path
from skill_seekers.cli.config_extractor import ConfigFileDetector
detector = ConfigFileDetector()
config_type = detector._detect_config_type(Path("build.gradle.kts"))
assert config_type == "kotlin-gradle"
def test_detect_settings_gradle_kts(self):
from pathlib import Path
from skill_seekers.cli.config_extractor import ConfigFileDetector
detector = ConfigFileDetector()
config_type = detector._detect_config_type(Path("settings.gradle.kts"))
assert config_type == "kotlin-gradle"
def test_infer_purpose_gradle(self):
from pathlib import Path
from skill_seekers.cli.config_extractor import ConfigFileDetector
detector = ConfigFileDetector()
purpose = detector._infer_purpose(Path("build.gradle.kts"), "kotlin-gradle")
assert purpose == "package_configuration"
# ── Tests: Extension Maps ──────────────────────────────────────────
class TestKotlinExtensionMaps:
"""Test that Kotlin is registered in all extension maps."""
def test_codebase_scraper_extension_map(self):
from skill_seekers.cli.codebase_scraper import LANGUAGE_EXTENSIONS
assert ".kt" in LANGUAGE_EXTENSIONS
assert ".kts" in LANGUAGE_EXTENSIONS
assert LANGUAGE_EXTENSIONS[".kt"] == "Kotlin"
def test_github_fetcher_code_extensions(self):
from skill_seekers.cli.github_fetcher import GitHubThreeStreamFetcher
# .kt is already in github_fetcher.py code_extensions
# Verify by checking the source has it
import inspect
source = inspect.getsource(GitHubThreeStreamFetcher)
assert '".kt"' in source