Jest passing tests but --covering option not picking up files
You are missing a setting in the jest.config.js, collectCoverage: true
module.exports = {
preset: "ts-jest",
testEnvironment: "node",
roots: ["../src/tests/"],
transform: {
"^.+\\.tsx?$": "ts-jest"
},
collectCoverage: true,
collectCoverageFrom: ["../src/"],
moduleFileExtensions: ["ts", "js", "json"],
coverageDirectory: "../coverage"
};
I also use a more descriptive collectCoverageFrom:
collectCoverageFrom: [
'<rootDir>/src/**/*.ts',
'!<rootDir>/src/**/*.interface.ts',
'!<rootDir>/src/**/*.mock.ts',
'!<rootDir>/src/**/*.module.ts',
'!<rootDir>/src/**/*.spec.ts',
'!<rootDir>/src/**/*.test.ts',
'!<rootDir>/src/**/*.d.ts'
],
This way I exclude a number of files I do not want to count coverage from, such as my modules, mocks, and tests.
My full file with the original Jest init process and the comments from that.
For a detailed explanation regarding each configuration property, visit: the Jest documentation
module.exports = {
// All imported modules in your tests should be mocked automatically
// automock: false,
// Stop running tests after the first failure
// bail: false,
// Respect "browser" field in package.json when resolving modules
// browser: false,
// The directory where Jest should store its cached dependency information
// cacheDirectory: "C:\\Users\\sscott\\AppData\\Local\\Temp\\jest",
// Automatically clear mock calls and instances between every test
// clearMocks: false,
// Indicates whether the coverage information should be collected while executing the test
collectCoverage: true,
// An array of glob patterns indicating a set of files for which coverage information should be collected
collectCoverageFrom: [
'<rootDir>/src/**/*.ts',
'!<rootDir>/src/**/*.mock.ts',
'!<rootDir>/src/**/*.module.ts',
'!<rootDir>/src/**/*.spec.ts',
'!<rootDir>/src/**/*.test.ts',
'!<rootDir>/src/**/*.d.ts'
],
// The directory where Jest should output its coverage files
coverageDirectory: "<rootDir>/docs",
// An array of regexp pattern strings used to skip coverage collection
coveragePathIgnorePatterns: [
"\\\\node_modules\\\\"
],
// A list of reporter names that Jest uses when writing coverage reports
coverageReporters: [
"lcov",
"clover",
"text-summary"
],
// An object that configures minimum threshold enforcement for coverage results
// coverageThreshold: null,
// Make calling deprecated APIs throw helpful error messages
errorOnDeprecated: true,
// Force coverage collection from ignored files usin a array of glob patterns
// forceCoverageMatch: [],
// A path to a module which exports an async function that is triggered once before all test suites
// globalSetup: null,
// A path to a module which exports an async function that is triggered once after all test suites
// globalTeardown: null,
// A set of global variables that need to be available in all test environments
globals: {
"ts-jest": {
"diagnostics": false,
"tsConfig": "tsconfig.json"
}
},
// An array of directory names to be searched recursively up from the requiring module's location
// moduleDirectories: [
// "node_modules"
// ],
// An array of file extensions your modules use
moduleFileExtensions: [
"ts",
"tsx",
"js"
],
// A map from regular expressions to module names that allow to stub out resources with a single module
// moduleNameMapper: {},
// An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
// modulePathIgnorePatterns: [],
// Activates notifications for test results
// notify: false,
// An enum that specifies notification mode. Requires { notify: true }
// notifyMode: "always",
// A preset that is used as a base for Jest's configuration
// preset: null,
// Run tests from one or more projects
// projects: null,
// Use this configuration option to add custom reporters to Jest
// reporters: undefined,
// Automatically reset mock state between every test
// resetMocks: false,
// Reset the module registry before running each individual test
// resetModules: false,
// A path to a custom resolver
// resolver: null,
// Automatically restore mock state between every test
// restoreMocks: false,
// The root directory that Jest should scan for tests and modules within
// rootDir: null,
// A list of paths to directories that Jest should use to search for files in
roots: [
"<rootDir>/src"
],
// Allows you to use a custom runner instead of Jest's default test runner
// runner: "jest-runner",
// The paths to modules that run some code to configure or set up the testing environment before each test
// setupFiles: [],
// The path to a module that runs some code to configure or set up the testing framework before each test
// setupTestFrameworkScriptFile: null,
// A list of paths to snapshot serializer modules Jest should use for snapshot testing
// snapshotSerializers: [],
// The test environment that will be used for testing
testEnvironment: "node",
// Options that will be passed to the testEnvironment
// testEnvironmentOptions: {},
// Adds a location field to test results
// testLocationInResults: false,
// The glob patterns Jest uses to detect test files
testMatch: [
"**/*.spec.ts"
],
// An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
// testPathIgnorePatterns: [
// "\\\\node_modules\\\\"
// ],
// The regexp pattern Jest uses to detect test files
// testRegex: "",
// This option allows the use of a custom results processor
// testResultsProcessor: null,
// "testResultsProcessor": "jest-jenkins-reporter",
// This option allows use of a custom test runner
// testRunner: "jasmine2",
// This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
// testURL: "http://localhost",
// Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
// timers: "real",
// A map from regular expressions to paths to transformers
transform: {
"^.+\\.(ts|tsx)$": "ts-jest"
},
// An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
// transformIgnorePatterns: [
// "\\\\node_modules\\\\"
// ],
// An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
// unmockedModulePathPatterns: undefined,
// Indicates whether each individual test should be reported during the run
verbose: false
// An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
// watchPathIgnorePatterns: [],
// Whether to use watchman for file crawling
// watchman: true,
};
Jaro
Hi! I'm Jaro. I love computers, keyboards (I build them for a hobby) and learning as I solve problems. I try my best to participate in communities such as this one and others mostly from tools I use.
Updated on August 22, 2022Comments
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Jaro over 1 year
Problem description:
I have written two tests for a typescript class. Those two tests pass so jest successfully retrieves the test files. I then use the --coverage option but it appears jest is not picking the covered files here.
Here is the output I am getting:api_jester | PASS src/tests/repositories/user.test.ts api_jester | User Repository api_jester | ✓ it should return an empty array (18ms) api_jester | ✓ should successfully create a user and return its data (7ms) api_jester | api_jester | ----------|----------|----------|----------|----------|-------------------| api_jester | File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s | api_jester | ----------|----------|----------|----------|----------|-------------------| api_jester | All files | 0 | 0 | 0 | 0 | | api_jester | ----------|----------|----------|----------|----------|-------------------| api_jester | Test Suites: 1 passed, 1 total api_jester | Tests: 2 passed, 2 total api_jester | Snapshots: 0 total api_jester | Time: 3.208s api_jester | Ran all test suites.
I have tried playing with the collectCoverageFrom option but without any success. I have tested covering with some simple examples found on github and those were working so the problem is not from my environment. I am guessing I somehow missed something in my configuration but I have spend so much time on this I am getting kind of frustrated so maybe some fresh looks could help..
Project architecture :
config |__ jest.config.js |__ tsconfig.json src |__tests | |__repositories | |__user.test.ts |__repositories |___ userRepository |__User.ts
Jest.config.js :
module.exports = { preset: "ts-jest", testEnvironment: "node", roots: ["../src/tests/"], transform: { "^.+\\.tsx?$": "ts-jest" }, collectCoverageFrom: ["../src/"], moduleFileExtensions: ["ts", "js", "json"], coverageDirectory: "../coverage" };
package.json
{ "name": "theralog_api", "version": "1.0.0", "description": "", "main": "server.js", "scripts": { "build": "tsc", "prettier": "npx prettier --write src/**/*.ts --config ./config/.prettierrc", "eslint": "npx eslint --config ./config/.eslintrc ./src/**/**/*", "start:dev": "npx nodemon -L --config ./config/api.nodemon.json", "test:watch": "npx nodemon -L --config ./config/jester.nodemon.json", "test:coverage": "npx jest --config ./config/jest.config.js --coverage --colors --watch" }, "keywords": [], "author": "", "license": "ISC", "devDependencies": { "@types/compression": "^1.0.1", "@types/express": "^4.17.1", "@types/graphql-depth-limit": "^1.1.2", "@types/jest": "^24.0.23", "@types/node": "^12.7.12", "@typescript-eslint/eslint-plugin": "^2.5.0", "@typescript-eslint/parser": "^2.5.0", "apollo-server-testing": "2.9.7", "babel-jest": "^24.9.0", "eslint": "^6.5.1", "eslint-config-prettier": "^6.4.0", "graphql-depth-limit": "^1.1.0", "graphql-import": "^0.7.1", "graphql-import-node": "0.0.4", "jest": "^24.9.0", "nodemon": "^1.19.3", "prettier": "^1.18.2", "ts-jest": "^24.1.0", "ts-node": "^8.4.1", "tsconfig-paths": "^3.9.0", "typescript": "^3.7.2" }, "dependencies": { "apollo-server-express": "^2.9.6", "compression": "^1.7.4", "cors": "^2.8.5", "dotenv": "^8.2.0", "express": "^4.17.1", "graphql": "^14.5.8", "http": "0.0.0", "lodash": "^4.17.15", "ncp": "^2.0.0", "pg": "^7.12.1", "winston": "3.2.1" } }
jester.nodemon.json
{ "watch": ["../src"], "ext": "ts", "exec": "npx jest --config ./config/jest.config.js --watchAll" }
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Jaro over 4 yearsShould I be needing the collectCoverage option if I already launch jest with the --coverage option? According to the documentation, they serve the same purpose.
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Steven Scott over 4 yearsNo, that switch should be the equivalent to the setting in the configuration file. I always run my tests with the coverage as opposed to running some with and some without. The second thing that seemed to help me was also the directory references, <rootDir> in the collectCoverageFrom. I have added my complete jest.config.js to my answer in case you see something extra. This file was generate from the jest init settings.
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Spock over 4 yearsDid you manage to get it working @ari ? I have a similar setup as you, same issue