Merge pull request #717 from huafu/better-coverage

[beta] Improving coverage

Author: huafu

package-lock.json

@@ -58,55 +58,54 @@
   },
   "homepage": "https://kulshekhar.github.io/ts-jest",
   "dependencies": {
-    "bs-logger": "^0.2.5",
-    "buffer-from": "^1.1.1",
-    "fast-json-stable-stringify": "^2.0.0",
-    "json5": "^2.0.1",
-    "make-error": "^1.3.5",
-    "mkdirp": "^0.5.1",
-    "semver": "^5.5.1",
-    "yargs-parser": "^10.1.0"
+    "bs-logger": "0.x",
+    "buffer-from": "1.x",
+    "fast-json-stable-stringify": "2.x",
+    "json5": "2.x",
+    "make-error": "1.x",
+    "mkdirp": "0.x",
+    "semver": "5.x",
+    "yargs-parser": "10.x"
   },
   "peerDependencies": {
     "jest": ">=22 <24"
   },
   "devDependencies": {
-    "@commitlint/cli": "^7.1.2",
-    "@commitlint/config-conventional": "^7.1.2",
-    "@types/babel__core": "^7.0.1",
-    "@types/buffer-from": "^1.1.0",
-    "@types/cross-spawn": "^6.0.0",
-    "@types/fs-extra": "5.0.4",
-    "@types/jest": "^23.3.2",
-    "@types/js-yaml": "^3.11.2",
-    "@types/json5": "^0.0.30",
-    "@types/lodash.memoize": "^4.1.4",
-    "@types/lodash.merge": "^4.6.4",
-    "@types/lodash.set": "^4.3.4",
-    "@types/mkdirp": "^0.5.2",
-    "@types/node": "^10.9.4",
-    "@types/semver": "^5.5.0",
-    "@types/yargs": "^11.1.1",
-    "conventional-changelog-cli": "^2.0.5",
-    "cross-spawn": "^6.0.5",
-    "doctoc": "^1.3.1",
-    "eslint": "^5.5.0",
-    "fs-extra": "^7.0.0",
-    "glob-gitignore": "^1.0.9",
-    "husky": "^0.14.3",
-    "jest": "^23.6.0",
-    "js-yaml": "^3.12.0",
-    "lint-staged": "^7.2.2",
-    "lodash.memoize": "^4.1.2",
-    "lodash.merge": "^4.6.1",
-    "lodash.set": "^4.3.2",
-    "npm-run-all": "^4.1.3",
-    "prettier": "^1.14.2",
-    "source-map": "^0.7.3",
-    "tslint": "^5.11.0",
-    "tslint-config-prettier": "^1.15.0",
-    "tslint-plugin-prettier": "^1.3.0",
-    "typescript": "^3.0.3"
+    "@commitlint/cli": "7.x",
+    "@commitlint/config-conventional": "7.x",
+    "@types/babel__core": "7.x",
+    "@types/buffer-from": "*",
+    "@types/cross-spawn": "*",
+    "@types/fs-extra": "*",
+    "@types/jest": "23.x",
+    "@types/js-yaml": "*",
+    "@types/json5": "*",
+    "@types/lodash.memoize": "4.x",
+    "@types/lodash.merge": "4.x",
+    "@types/lodash.set": "4.x",
+    "@types/mkdirp": "*",
+    "@types/node": "10.x",
+    "@types/semver": "*",
+    "@types/yargs": "*",
+    "conventional-changelog-cli": "2.x",
+    "cross-spawn": "*",
+    "eslint": "*",
+    "fs-extra": "*",
+    "glob-gitignore": "*",
+    "husky": "*",
+    "jest": "23.x",
+    "js-yaml": "*",
+    "lint-staged": "*",
+    "lodash.memoize": "4.x",
+    "lodash.merge": "4.x",
+    "lodash.set": "4.x",
+    "npm-run-all": "*",
+    "prettier": "*",
+    "source-map": "*",
+    "tslint": "*",
+    "tslint-config-prettier": "*",
+    "tslint-plugin-prettier": "*",
+    "typescript": "3.x"
   },
   "lint-staged": {
     "linters": {

package.json

@@ -11,3 +11,40 @@ export function spied<T>(val: T): T extends (...args: any[]) => any ? jest.SpyIn
 }
 
 export const logTargetMock = () => (rootLogger as testing.LoggerMock).target
+
+export const mockObject = <T, M>(obj: T, newProps: M): T & M & { mockRestore: () => T } => {
+  const backup: any = Object.create(null)
+
+  Object.keys(newProps).forEach(key => {
+    const desc = (backup[key] = Object.getOwnPropertyDescriptor(obj, key))
+    const newDesc: any = { ...desc }
+    if (newDesc.get) {
+      newDesc.get = () => (newProps as any)[key]
+    } else {
+      newDesc.value = (newProps as any)[key]
+    }
+    Object.defineProperty(obj, key, newDesc)
+  })
+  if ((obj as any).mockRestore) backup.mockRestore = Object.getOwnPropertyDescriptor(obj, 'mockRestore')
+  return Object.defineProperty(obj, 'mockRestore', {
+    value() {
+      Object.keys(backup).forEach(key => {
+        Object.defineProperty(obj, key, backup[key])
+      })
+      return obj
+    },
+    configurable: true,
+  })
+}
+
+export const mockWriteStream = () => {
+  return {
+    written: [] as string[],
+    write(text: string) {
+      this.written.push(text)
+    },
+    clear() {
+      this.written = []
+    },
+  }
+}