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code-server/test/unit/constants.test.ts

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import { loggerModule } from "../utils/helpers"
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// jest.mock is hoisted above the imports so we must use `require` here.
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jest.mock("@coder/logger", () => require("../utils/helpers").loggerModule)
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describe("constants", () => {
beforeAll(() => {
jest.clearAllMocks()
jest.resetModules()
})
describe("with package.json defined", () => {
const { getPackageJson } = require("../../src/node/constants")
let mockPackageJson = {
name: "mock-code-server",
description: "Run VS Code on a remote server.",
repository: "https://github.com/cdr/code-server",
version: "1.0.0",
commit: "f6b2be2838f4afb217c2fd8f03eafedd8d55ef9b",
}
let version = ""
let commit = ""
beforeEach(() => {
jest.mock("../../package.json", () => mockPackageJson, { virtual: true })
commit = require("../../src/node/constants").commit
version = require("../../src/node/constants").version
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})
afterAll(() => {
jest.clearAllMocks()
jest.resetModules()
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})
it("should provide the commit", () => {
expect(commit).toBe("f6b2be2838f4afb217c2fd8f03eafedd8d55ef9b")
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})
it("should return the package.json version", () => {
expect(version).toBe(mockPackageJson.version)
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})
describe("getPackageJson", () => {
it("should log a warning if package.json not found", () => {
const expectedErrorMessage = "Cannot find module './package.json' from 'src/node/constants.ts'"
getPackageJson("./package.json")
expect(loggerModule.logger.warn).toHaveBeenCalled()
expect(loggerModule.logger.warn).toHaveBeenCalledWith(expectedErrorMessage)
})
it("should find the package.json", () => {
// the function calls require from src/node/constants
// so to get the root package.json we need to use ../../
const packageJson = getPackageJson("../../package.json")
expect(Object.keys(packageJson).length).toBeGreaterThan(0)
expect(packageJson.name).toBe("mock-code-server")
expect(packageJson.description).toBe("Run VS Code on a remote server.")
expect(packageJson.repository).toBe("https://github.com/cdr/code-server")
})
})
})
describe("with incomplete package.json", () => {
let mockPackageJson = {
name: "mock-code-server",
}
let version = ""
let commit = ""
beforeEach(() => {
jest.mock("../../package.json", () => mockPackageJson, { virtual: true })
version = require("../../src/node/constants").version
commit = require("../../src/node/constants").commit
})
afterEach(() => {
jest.clearAllMocks()
jest.resetModules()
})
it("version should return 'development'", () => {
expect(version).toBe("development")
})
it("commit should return 'development'", () => {
expect(commit).toBe("development")
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})
})
})