From 06b579b689d7a562cf1463b09cd98923ada37599 Mon Sep 17 00:00:00 2001
From: John Martel <jonathan.martel@coglinc.ca>
Date: Tue, 27 Oct 2020 20:38:52 -0400
Subject: [PATCH] Configure Jest using Typescript

This brings auto-completion to Jest configuration.

See: https://github.com/facebook/jest/pull/10564
See: https://github.com/facebook/jest/issues/9636#issuecomment-604134083
---
 jest.config.js => jest.config.ts |  5 ++++-
 package-lock.json                | 31 +++++++++++++++++++++++++++++++
 package.json                     |  2 ++
 tsconfig.json                    |  5 ++++-
 4 files changed, 41 insertions(+), 2 deletions(-)
 rename jest.config.js => jest.config.ts (84%)

diff --git a/jest.config.js b/jest.config.ts
similarity index 84%
rename from jest.config.js
rename to jest.config.ts
index b384820..ef889b5 100644
--- a/jest.config.js
+++ b/jest.config.ts
@@ -1,4 +1,6 @@
-module.exports = {
+import type { Config } from '@jest/types';
+
+const config: Config.InitialOptions = {
   // this is a workaround since enabling coverage breaks sourceMaps
   // See: https://github.com/kulshekhar/ts-jest/issues/917
   // See: https://github.com/facebook/jest/issues/5739
@@ -18,3 +20,4 @@ module.exports = {
   reporters: ['default', 'jest-junit'],
   testEnvironment: 'node',
 };
+export default config;
diff --git a/package-lock.json b/package-lock.json
index 34a5783..b02575b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1824,6 +1824,12 @@
         "picomatch": "^2.0.4"
       }
     },
+    "arg": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+      "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+      "dev": true
+    },
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
@@ -2586,6 +2592,12 @@
       "integrity": "sha512-TLz+x/vEXm/Y7P7wn1EJFNLxYpUD4TgMosxY6fAVJUnJMbupHBOncxyWUG9OpTaH9EBD7uFI5LfEgmMOc54DsA==",
       "dev": true
     },
+    "diff": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
+      "integrity": "sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==",
+      "dev": true
+    },
     "diff-sequences": {
       "version": "26.5.0",
       "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-26.5.0.tgz",
@@ -8571,6 +8583,19 @@
         }
       }
     },
+    "ts-node": {
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-9.0.0.tgz",
+      "integrity": "sha512-/TqB4SnererCDR/vb4S/QvSZvzQMJN8daAslg7MeaiHvD8rDZsSfXmNeNumyZZzMned72Xoq/isQljYSt8Ynfg==",
+      "dev": true,
+      "requires": {
+        "arg": "^4.1.0",
+        "diff": "^4.0.1",
+        "make-error": "^1.1.1",
+        "source-map-support": "^0.5.17",
+        "yn": "3.1.1"
+      }
+    },
     "tsconfig-paths": {
       "version": "3.9.0",
       "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.9.0.tgz",
@@ -9047,6 +9072,12 @@
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
       }
+    },
+    "yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index 563ce11..ef1ff3b 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "test:ci": "jest --coverage --ci"
   },
   "devDependencies": {
+    "@jest/types": "26.6.1",
     "@types/jest": "26.0.15",
     "@typescript-eslint/eslint-plugin": "2.34.0",
     "@typescript-eslint/parser": "2.34.0",
@@ -40,6 +41,7 @@
     "prettier": "2.1.2",
     "rimraf": "3.0.2",
     "ts-jest": "26.4.2",
+    "ts-node": "9.0.0",
     "typescript": "4.0.3"
   },
   "dependencies": {
diff --git a/tsconfig.json b/tsconfig.json
index 3d720c2..5890d67 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -22,5 +22,8 @@
   "include": [
     "src/**/*"
   ],
-  "compileOnSave": true
+  "compileOnSave": true,
+  "tsNode": {
+    "compiler": "typescript"
+  }
 }