test: Add jest testsuite with xmltest cases

.gitattributes

@@ -0,0 +1,2 @@
+; jest snapshots can and should show in diff, since they are not binary
+*.test.js.snap diff

jest.config.js

@@ -115,9 +115,10 @@ module.exports = {
   // rootDir: undefined,
 
   // A list of paths to directories that Jest should use to search for files in
-  // roots: [
-  //   "<rootDir>"
-  // ],
+  roots: [
+  	// prevents jest from looking for tests in other directories (e.g. leftover `.stryker-tmp`)
+    "test"
+  ],
 
   // Allows you to use a custom runner instead of Jest's default test runner
   // runner: "jest-runner",
@@ -156,8 +157,8 @@ module.exports = {
 
   // The regexp pattern or array of patterns that Jest uses to detect test files
   testRegex: [
-  	/\.test\.js?$/
-	],
+    /test\/.*\.test\.js$/
+  ],
 
   // This option allows the use of a custom results processor
   // testResultsProcessor: undefined,

package.json

@@ -43,10 +43,13 @@
     "dom-js": "0.0.9",
     "eslint": "^7.7.0",
     "eslint-plugin-es5": "^1.5.0",
+    "get-stream": "^6.0.0",
     "jest": "^26.4.2",
     "nodemon": "^2.0.4",
     "npm-run-all": "^4.1.5",
-    "vows": "^0.8.3"
+    "vows": "^0.8.3",
+    "xmltest": "github:karfau/xmltest#v1.0.1",
+    "yauzl": "^2.10.0"
   },
   "maintainers": [
     {

stryker.conf.json

@@ -16,6 +16,10 @@
   },
   "coverageAnalysis": "all",
   "commandRunner": {
-    "command": "npm run test:unit"
-  }
+    "command": "jest"
+  },
+  "files": [
+    "test/**/*.test.js", "test/get-test-parser.js", "lib/*.js", "package.json", "jest.config.js"
+  ],
+  "timeoutMS": 15000
 }

test/get-test-parser.js

@@ -0,0 +1,39 @@
+var {DOMParser} = require('../lib/dom-parser')
+
+/**
+ * @typedef ErrorLevel {'warn' | 'error' | 'fatalError'}
+ */
+/**
+ * Helper method for configuring an instance of DOMParser.
+ * Calling it without any arguments allows to assert on `errors` after using the parser.
+ * every field of the first argument is options and allows to specify test specific behavior.
+ * - `errorHandler`: The `locator` to pass to DOMParser constructor options,
+ * 									default stores a list of all entries per `key` in `errors` and does not log or throw.
+ * - `errors`: the object for the `errorHandler` to use,
+ * 						is also returned with the same name for later assertions,
+ * 						default is an empty object
+ * - `locator`: The `locator` to pass to DOMParser constructor options,
+ * 			  		 default is an empty object
+ *
+ * @param options {{
+ * 					errorHandler?: function (key: ErrorLevel, msg: string)
+ * 				  							| Partial<Record<ErrorLevel, function(msg:string)>>,
+ * 					errors?: Partial<Record<ErrorLevel, string[]>>,
+ * 					locator?: Object
+ *				}}
+ * @returns {{parser: DOMParser, errors: Partial<Record<ErrorLevel, string[]>>}}
+ */
+function getTestParser ({errorHandler, errors = {}, locator = {}} = {}) {
+	errorHandler = errorHandler || ((key, msg) => {
+		if (!errors[key]) errors[key] = []
+		errors[key].push(msg)
+	})
+	return {
+		errors,
+		parser: new DOMParser({errorHandler, locator})
+	}
+}
+
+module.exports = {
+	getTestParser: getTestParser
+}