feat: add framework leak detection for domain layer

- Add IFrameworkLeakDetector interface in domain/services
- Add FrameworkLeak value object with framework type categorization
- Implement FrameworkLeakDetector with 250+ framework patterns across 12 categories
- Add comprehensive test suite (35 tests) for framework leak detection
- Support HTTP frameworks, ORMs, loggers, caches, message queues, etc.
- Detect framework imports in domain layer and suggest proper abstractions
This commit is contained in:
imfozilbek
2025-11-24 12:53:37 +05:00
parent 32bcf7d465
commit 0e23938e20
4 changed files with 542 additions and 0 deletions

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import { FrameworkLeak } from "../value-objects/FrameworkLeak"
/**
* Interface for detecting framework-specific imports in domain layer
*
* Framework leaks occur when domain layer imports framework-specific packages,
* violating Clean Architecture principles by creating tight coupling to external frameworks.
*/
export interface IFrameworkLeakDetector {
/**
* Detects framework leaks in the given file
*
* @param imports - Array of import paths from the file
* @param filePath - Path to the file being analyzed
* @param layer - The architectural layer of the file (domain, application, infrastructure, shared)
* @returns Array of detected framework leaks
*/
detectLeaks(imports: string[], filePath: string, layer: string | undefined): FrameworkLeak[]
/**
* Checks if a specific import is a framework package
*
* @param importPath - The import path to check
* @returns True if the import is a framework package
*/
isFrameworkPackage(importPath: string): boolean
}

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import { ValueObject } from "./ValueObject"
import { FRAMEWORK_LEAK_MESSAGES } from "../../shared/constants/rules"
interface FrameworkLeakProps {
readonly packageName: string
readonly filePath: string
readonly layer: string
readonly category: string
readonly line?: number
}
/**
* Represents a framework leak violation in the codebase
*
* A framework leak occurs when a domain layer file imports a framework-specific package,
* creating tight coupling and violating Clean Architecture principles.
*
* @example
* ```typescript
* // Bad: Domain layer importing Prisma
* const leak = FrameworkLeak.create(
* '@prisma/client',
* 'src/domain/User.ts',
* 'domain',
* 'ORM',
* 5
* )
*
* console.log(leak.getMessage())
* // "Domain layer imports framework-specific package "@prisma/client". Use interfaces and dependency injection instead."
* ```
*/
export class FrameworkLeak extends ValueObject<FrameworkLeakProps> {
private constructor(props: FrameworkLeakProps) {
super(props)
}
public static create(
packageName: string,
filePath: string,
layer: string,
category: string,
line?: number,
): FrameworkLeak {
return new FrameworkLeak({
packageName,
filePath,
layer,
category,
line,
})
}
public get packageName(): string {
return this.props.packageName
}
public get filePath(): string {
return this.props.filePath
}
public get layer(): string {
return this.props.layer
}
public get category(): string {
return this.props.category
}
public get line(): number | undefined {
return this.props.line
}
public getMessage(): string {
return FRAMEWORK_LEAK_MESSAGES.DOMAIN_IMPORT.replace("{package}", this.props.packageName)
}
public getSuggestion(): string {
return FRAMEWORK_LEAK_MESSAGES.SUGGESTION
}
public getCategoryDescription(): string {
switch (this.props.category) {
case "ORM":
return "Database ORM/ODM"
case "WEB_FRAMEWORK":
return "Web Framework"
case "HTTP_CLIENT":
return "HTTP Client"
case "VALIDATION":
return "Validation Library"
case "DI_CONTAINER":
return "DI Container"
case "LOGGER":
return "Logger"
case "CACHE":
return "Cache"
case "MESSAGE_QUEUE":
return "Message Queue"
case "EMAIL":
return "Email Service"
case "STORAGE":
return "Storage Service"
case "TESTING":
return "Testing Framework"
case "TEMPLATE_ENGINE":
return "Template Engine"
default:
return "Framework Package"
}
}
}

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import { IFrameworkLeakDetector } from "../../domain/services/IFrameworkLeakDetector"
import { FrameworkLeak } from "../../domain/value-objects/FrameworkLeak"
import { FRAMEWORK_PACKAGES, LAYERS } from "../../shared/constants/rules"
/**
* Detects framework-specific imports in domain layer
*
* This detector identifies violations where domain layer files import framework-specific packages,
* which creates tight coupling and violates Clean Architecture principles.
*
* The domain layer should only contain business logic and domain interfaces.
* Framework implementations should be in the infrastructure layer.
*
* @example
* ```typescript
* const detector = new FrameworkLeakDetector()
*
* // Detect leaks in a domain file
* const imports = ['@prisma/client', 'express', '../entities/User']
* const leaks = detector.detectLeaks(imports, 'src/domain/User.ts', 'domain')
*
* // leaks will contain violations for '@prisma/client' and 'express'
* console.log(leaks.length) // 2
* console.log(leaks[0].packageName) // '@prisma/client'
* console.log(leaks[0].category) // 'ORM'
* ```
*/
export class FrameworkLeakDetector implements IFrameworkLeakDetector {
private readonly frameworkPackages: Map<string, string>
constructor() {
this.frameworkPackages = this.buildFrameworkPackageMap()
}
/**
* Detects framework leaks in the given file
*
* @param imports - Array of import paths from the file
* @param filePath - Path to the file being analyzed
* @param layer - The architectural layer of the file (domain, application, infrastructure, shared)
* @returns Array of detected framework leaks
*/
public detectLeaks(
imports: string[],
filePath: string,
layer: string | undefined,
): FrameworkLeak[] {
if (layer !== LAYERS.DOMAIN) {
return []
}
const leaks: FrameworkLeak[] = []
for (const importPath of imports) {
const category = this.getFrameworkCategory(importPath)
if (category) {
leaks.push(FrameworkLeak.create(importPath, filePath, layer, category))
}
}
return leaks
}
/**
* Checks if a specific import is a framework package
*
* @param importPath - The import path to check
* @returns True if the import is a framework package
*/
public isFrameworkPackage(importPath: string): boolean {
return this.frameworkPackages.has(importPath)
}
/**
* Gets the category of a framework package
*
* @param importPath - The import path to check
* @returns The category name if it's a framework package, undefined otherwise
*/
private getFrameworkCategory(importPath: string): string | undefined {
if (importPath.startsWith(".") || importPath.startsWith("/")) {
return undefined
}
return this.frameworkPackages.get(importPath)
}
/**
* Builds a map of framework packages to their categories
*
* @returns Map of package names to category names
*/
private buildFrameworkPackageMap(): Map<string, string> {
const map = new Map<string, string>()
for (const [category, packages] of Object.entries(FRAMEWORK_PACKAGES)) {
for (const pkg of packages) {
map.set(pkg, category)
}
}
return map
}
}

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import { describe, it, expect, beforeEach } from "vitest"
import { FrameworkLeakDetector } from "../src/infrastructure/analyzers/FrameworkLeakDetector"
describe("FrameworkLeakDetector", () => {
let detector: FrameworkLeakDetector
beforeEach(() => {
detector = new FrameworkLeakDetector()
})
describe("detectLeaks", () => {
it("should detect ORM framework leak in domain layer", () => {
const imports = ["@prisma/client", "../entities/User"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks).toHaveLength(1)
expect(leaks[0].packageName).toBe("@prisma/client")
expect(leaks[0].category).toBe("ORM")
expect(leaks[0].layer).toBe("domain")
expect(leaks[0].filePath).toBe("src/domain/User.ts")
})
it("should detect web framework leak in domain layer", () => {
const imports = ["express", "./UserService"]
const leaks = detector.detectLeaks(
imports,
"src/domain/services/UserService.ts",
"domain",
)
expect(leaks).toHaveLength(1)
expect(leaks[0].packageName).toBe("express")
expect(leaks[0].category).toBe("WEB_FRAMEWORK")
})
it("should detect multiple framework leaks", () => {
const imports = ["@prisma/client", "express", "axios", "../entities/User"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks).toHaveLength(3)
expect(leaks[0].packageName).toBe("@prisma/client")
expect(leaks[1].packageName).toBe("express")
expect(leaks[2].packageName).toBe("axios")
})
it("should not detect leaks in infrastructure layer", () => {
const imports = ["@prisma/client", "express", "../domain/User"]
const leaks = detector.detectLeaks(
imports,
"src/infrastructure/UserRepository.ts",
"infrastructure",
)
expect(leaks).toHaveLength(0)
})
it("should not detect leaks in application layer", () => {
const imports = ["express", "../domain/User"]
const leaks = detector.detectLeaks(
imports,
"src/application/CreateUser.ts",
"application",
)
expect(leaks).toHaveLength(0)
})
it("should not detect relative imports as leaks", () => {
const imports = ["./UserService", "../entities/User", "../../shared/utils"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks).toHaveLength(0)
})
it("should handle empty imports", () => {
const leaks = detector.detectLeaks([], "src/domain/User.ts", "domain")
expect(leaks).toHaveLength(0)
})
it("should handle undefined layer", () => {
const imports = ["@prisma/client"]
const leaks = detector.detectLeaks(imports, "src/utils/helper.ts", undefined)
expect(leaks).toHaveLength(0)
})
})
describe("isFrameworkPackage", () => {
it("should identify Prisma as framework package", () => {
expect(detector.isFrameworkPackage("@prisma/client")).toBe(true)
})
it("should identify Express as framework package", () => {
expect(detector.isFrameworkPackage("express")).toBe(true)
})
it("should identify Mongoose as framework package", () => {
expect(detector.isFrameworkPackage("mongoose")).toBe(true)
})
it("should identify Axios as framework package", () => {
expect(detector.isFrameworkPackage("axios")).toBe(true)
})
it("should not identify relative import as framework package", () => {
expect(detector.isFrameworkPackage("./UserService")).toBe(false)
})
it("should not identify relative import as framework package", () => {
expect(detector.isFrameworkPackage("../entities/User")).toBe(false)
})
it("should not identify non-framework package as framework", () => {
expect(detector.isFrameworkPackage("lodash")).toBe(false)
})
it("should not identify Node.js built-ins as framework", () => {
expect(detector.isFrameworkPackage("fs")).toBe(false)
expect(detector.isFrameworkPackage("path")).toBe(false)
})
})
describe("Framework Categories", () => {
it("should detect TypeORM as ORM", () => {
const imports = ["typeorm"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("ORM")
expect(leaks[0].getCategoryDescription()).toBe("Database ORM/ODM")
})
it("should detect Knex as ORM", () => {
const imports = ["knex"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("ORM")
})
it("should detect Fastify as web framework", () => {
const imports = ["fastify"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("WEB_FRAMEWORK")
expect(leaks[0].getCategoryDescription()).toBe("Web Framework")
})
it("should detect NestJS as web framework", () => {
const imports = ["@nestjs/common"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("WEB_FRAMEWORK")
})
it("should detect Winston as logger", () => {
const imports = ["winston"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("LOGGER")
expect(leaks[0].getCategoryDescription()).toBe("Logger")
})
it("should detect Pino as logger", () => {
const imports = ["pino"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("LOGGER")
})
it("should detect Redis as cache", () => {
const imports = ["redis"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("CACHE")
expect(leaks[0].getCategoryDescription()).toBe("Cache")
})
it("should detect cache-manager as cache", () => {
const imports = ["cache-manager"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("CACHE")
})
it("should detect Joi as validation library", () => {
const imports = ["joi"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("VALIDATION")
expect(leaks[0].getCategoryDescription()).toBe("Validation Library")
})
it("should detect Nodemailer as email service", () => {
const imports = ["nodemailer"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("EMAIL")
expect(leaks[0].getCategoryDescription()).toBe("Email Service")
})
it("should detect Jest as testing framework", () => {
const imports = ["jest"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("TESTING")
expect(leaks[0].getCategoryDescription()).toBe("Testing Framework")
})
it("should detect EJS as template engine", () => {
const imports = ["ejs"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("TEMPLATE_ENGINE")
expect(leaks[0].getCategoryDescription()).toBe("Template Engine")
})
it("should detect Handlebars as template engine", () => {
const imports = ["handlebars"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].category).toBe("TEMPLATE_ENGINE")
})
})
describe("FrameworkLeak value object", () => {
it("should have correct message", () => {
const imports = ["@prisma/client"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].getMessage()).toContain("@prisma/client")
expect(leaks[0].getMessage()).toContain(
"Domain layer imports framework-specific package",
)
})
it("should have suggestion", () => {
const imports = ["express"]
const leaks = detector.detectLeaks(imports, "src/domain/User.ts", "domain")
expect(leaks[0].getSuggestion()).toContain("Create an interface in domain layer")
expect(leaks[0].getSuggestion()).toContain("implement it in infrastructure layer")
})
})
describe("Real-world scenarios", () => {
it("should detect database leak in User entity", () => {
const imports = [
"@prisma/client",
"../value-objects/Email",
"../value-objects/Password",
]
const leaks = detector.detectLeaks(imports, "src/domain/entities/User.ts", "domain")
expect(leaks).toHaveLength(1)
expect(leaks[0].packageName).toBe("@prisma/client")
})
it("should detect HTTP client in domain service", () => {
const imports = ["axios", "./IUserRepository", "../entities/User"]
const leaks = detector.detectLeaks(
imports,
"src/domain/services/UserService.ts",
"domain",
)
expect(leaks).toHaveLength(1)
expect(leaks[0].packageName).toBe("axios")
expect(leaks[0].category).toBe("HTTP_CLIENT")
})
it("should allow framework in repository implementation", () => {
const imports = [
"@prisma/client",
"../../domain/entities/User",
"../../domain/repositories/IUserRepository",
]
const leaks = detector.detectLeaks(
imports,
"src/infrastructure/repositories/PrismaUserRepository.ts",
"infrastructure",
)
expect(leaks).toHaveLength(0)
})
it("should detect validation library in domain", () => {
const imports = ["zod", "../entities/User"]
const leaks = detector.detectLeaks(
imports,
"src/domain/value-objects/Email.ts",
"domain",
)
expect(leaks).toHaveLength(1)
expect(leaks[0].packageName).toBe("zod")
expect(leaks[0].category).toBe("VALIDATION")
})
})
})