Add typescript support to tests with ts-jest

jest.config.js

@@ -89,7 +89,7 @@ module.exports = {
   // notifyMode: "failure-change",
 
   // A preset that is used as a base for Jest's configuration
-  // preset: undefined,
+  preset: 'ts-jest',
 
   // Run tests from one or more projects
   // projects: undefined,

package.json

@@ -10,7 +10,7 @@
     "build": "tsc",
     "tsc": "tsc",
     "jest": "jest",
-    "lint": "eslint 'lib/*/**/*.{js,ts}'",
+    "lint": "eslint '{lib,test}/*/**/*.{js,ts}'",
     "test": "jest"
   },
   "keywords": [
@@ -34,6 +34,7 @@
   },
   "devDependencies": {
     "@types/bignum": "0.0.29",
+    "@types/jest": "^25.2.3",
     "@types/node": "^14.0.6",
     "@types/xmldoc": "^1.1.4",
     "@typescript-eslint/eslint-plugin": "^3.1.0",
@@ -45,6 +46,7 @@
     "eslint-plugin-jsx-a11y": "^6.2.3",
     "eslint-plugin-react": "^7.20.0",
     "jest": "^26.0.1",
+    "ts-jest": "^26.1.0",
     "typescript": "^3.9.3"
   }
 }

tests/asyncTimer.test.js → tests/asyncTimer.test.ts

@@ -1,10 +1,9 @@
-/* eslint-disable */
-const asyncTimer = require('../dist/SteamCondenser/asyncTimer.js');
+import * as asyncTimer from '../lib/SteamCondenser/asyncTimer';
 
 test('resolving doWithin should return resolved value', async () => {
   const expectedResult = 1;
 
-  const val = await asyncTimer.doWithin(new Promise(resolve => resolve(expectedResult)), 1);
+  const val = await asyncTimer.doWithin(new Promise((resolve) => resolve(expectedResult)), 1);
 
   expect(val).toBe(expectedResult);
 });
@@ -14,25 +13,26 @@ test('rejecting doWithin should throw error', async () => {
 
   let err;
   try {
-    const val = await asyncTimer.doWithin(new Promise((resolve, reject) => reject(new Error(rejectMessage))), 1)
-  }
-  catch (e) {
+    await asyncTimer.doWithin(
+      new Promise((resolve, reject) => reject(new Error(rejectMessage))),
+      1,
+      );
+  } catch (e) {
     err = e;
   }
-  
+
   expect(err).not.toBeUndefined();
   expect(err.message).toBe(rejectMessage);
 });
 
 test('not resolving or rejecting promise should throw error', async () => {
   let err;
   try {
-    const val = await asyncTimer.doWithin(new Promise((resolve, reject) => () => {}), 1)
-  }
-  catch (e) {
+    await asyncTimer.doWithin(new Promise(() => () => {}), 1);
+  } catch (e) {
     err = e;
   }
-  
+
   expect(err).not.toBeUndefined();
   expect(err.message).toBe('Timed out.');
 });