migrate to jest fix jhipster/generator-jhipster#15171

.eslintignore

@@ -1,8 +1,10 @@
-node_modules/
-tests/karma.conf.js
 webpack.config.js
 target/
 build/
 bundles/
 lib/
 coverage/
+node_modules/
+jest.conf.js
+node/
+postcss.config.js

.eslintrc.json

@@ -1,48 +1,79 @@
 {
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
   "extends": [
-    "jhipster-react"
+    "plugin:react/recommended",
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    "prettier",
+    "eslint-config-prettier"
   ],
   "parserOptions": {
+    "ecmaVersion": 2018,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    },
     "project": "./tsconfig.json"
   },
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  },
   "rules": {
-    "@typescript-eslint/explicit-module-boundary-types": [
-      "warn"
-    ],
-    "@typescript-eslint/no-unsafe-assignment": [
-      "warn"
-    ],
-    "@typescript-eslint/no-unsafe-call": [
-      "warn"
-    ],
-    "@typescript-eslint/no-unsafe-member-access": [
-      "warn"
-    ],
-    "@typescript-eslint/no-unsafe-return": [
-      "warn"
-    ],
-    "no-shadow": [
-      "warn"
-    ],
-    "@typescript-eslint/restrict-template-expressions": [
-      "warn"
-    ],
-    "@typescript-eslint/restrict-plus-operands": [
-      "warn"
+    "@typescript-eslint/member-ordering": [
+      "error",
+      {
+        "default": ["static-field", "instance-field", "constructor", "static-method", "instance-method"]
+      }
     ],
+    "@typescript-eslint/no-parameter-properties": ["warn", { "allows": ["public", "private", "protected"] }],
+    "@typescript-eslint/no-unused-vars": "off",
+    "@typescript-eslint/explicit-member-accessibility": "off",
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-unsafe-return": "off",
+    "@typescript-eslint/no-unsafe-member-access": "off",
+    "@typescript-eslint/no-unsafe-call": "off",
+    "@typescript-eslint/no-unsafe-assignment": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "off",
+    "@typescript-eslint/restrict-template-expressions": "off",
+    "@typescript-eslint/restrict-plus-operands": "off",
+    "@typescript-eslint/no-floating-promises": "off",
     "@typescript-eslint/ban-types": [
-      "warn"
-    ]
-  },
-  "overrides": [
-    {
-      "files": ["./tests/spec/**/*"],
-      "rules": {
-        "@typescript-eslint/no-unsafe-return": "off",
-        "@typescript-eslint/no-unsafe-assignment": "off",
-        "@typescript-eslint/no-unsafe-call": "off",
-        "@typescript-eslint/no-unsafe-member-access": "off"
+      "error",
+      {
+        "types": {
+          "Object": "Use {} instead."
+        }
       }
-    }
-  ]
+    ],
+    "@typescript-eslint/interface-name-prefix": "off",
+    "@typescript-eslint/no-empty-function": "off",
+    "@typescript-eslint/unbound-method": "off",
+    "@typescript-eslint/array-type": "off",
+    "@typescript-eslint/no-shadow": "error",
+    "spaced-comment": ["warn", "always"],
+    "guard-for-in": "error",
+    "no-labels": "error",
+    "no-caller": "error",
+    "no-bitwise": "error",
+    "no-console": ["error", { "allow": ["warn", "error"] }],
+    "no-new-wrappers": "error",
+    "no-eval": "error",
+    "no-new": "error",
+    "no-var": "error",
+    "radix": "error",
+    "eqeqeq": ["error", "always", { "null": "ignore" }],
+    "prefer-const": "error",
+    "object-shorthand": ["error", "always", { "avoidExplicitReturnArrows": true }],
+    "default-case": "error",
+    "complexity": ["error", 40],
+    "no-invalid-this": "off",
+    "react/prop-types": "off",
+    "react/display-name": "off"
+  }
 }

.gitignore

@@ -22,6 +22,7 @@ coverage
 *.metadata.json
 /bundles
 /lib/tests
+build/
 
 #################
 ## IDE

jest.conf.js

@@ -0,0 +1,53 @@
+const tsconfig = require('./tsconfig.json');
+
+module.exports = {
+  transform: {
+    '^.+\\.tsx?$': 'ts-jest',
+  },
+  testURL: 'http://localhost/',
+  cacheDirectory: '<rootDir>/build/jest-cache',
+  coverageDirectory: '<rootDir>/build/test-results/',
+  testMatch: ['<rootDir>/src/**/@(*.)@(spec.ts?(x))'],
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  moduleNameMapper: mapTypescriptAliasToJestAlias({
+    '\\.(css|scss)$': 'identity-obj-proxy',
+  }),
+  reporters: ['default', ['jest-junit', { outputDirectory: './build/test-results/', outputName: 'TESTS-results-jest.xml' }]],
+  testPathIgnorePatterns: ['<rootDir>/node_modules/'],
+  globals: {
+    'ts-jest': {
+      tsconfig: './tsconfig.test.json',
+      compiler: 'typescript',
+      diagnostics: false,
+    },
+  },
+};
+
+function mapTypescriptAliasToJestAlias(alias = {}) {
+  const jestAliases = { ...alias };
+  if (!tsconfig.compilerOptions.paths) {
+    return jestAliases;
+  }
+  Object.entries(tsconfig.compilerOptions.paths)
+    .filter(([key, value]) => {
+      // use Typescript alias in Jest only if this has value
+      if (value.length) {
+        return true;
+      }
+      return false;
+    })
+    .map(([key, value]) => {
+      // if Typescript alias ends with /* then in Jest:
+      // - alias key must end with /(.*)
+      // - alias value must end with /$1
+      const regexToReplace = /(.*)\/\*$/;
+      const aliasKey = key.replace(regexToReplace, '$1/(.*)');
+      const aliasValue = value[0].replace(regexToReplace, '$1/$$1');
+      return [aliasKey, `<rootDir>/${aliasValue}`];
+    })
+    .reduce((aliases, [key, value]) => {
+      aliases[key] = value;
+      return aliases;
+    }, jestAliases);
+  return jestAliases;
+}