Add jest config and export main.js

dist/index.js

@@ -378,7 +378,7 @@ module.exports._enoent = enoent;
 /***/ }),
 
 /***/ 31:
-/***/ (function(__unusedmodule, __unusedexports, __webpack_require__) {
+/***/ (function(module, __unusedexports, __webpack_require__) {
 
 const core = __webpack_require__(470);
 const { GitHub, context } = __webpack_require__(469);
@@ -426,7 +426,11 @@ async function run() {
   }
 }
 
-run();
+module.exports = run;
+
+if (require.main === require.cache[eval('__filename')]) {
+  run();
+}
 
 
 /***/ }),

package.json

@@ -36,5 +36,19 @@
     "jest": "^24.8.0",
     "prettier": "^1.16.4",
     "husky": "^3.0.5"
+  },
+  "jest": {
+    "testEnvironment": "node",
+    "collectCoverageFrom": [
+      "src/main.js"
+    ],
+    "coverageThreshold": {
+      "global": {
+        "branches": 80,
+        "functions": 80,
+        "lines": 80,
+        "statements": 80
+      }
+    }
   }
 }

src/main.js

@@ -44,4 +44,8 @@ async function run() {
   }
 }
 
-run();
+module.exports = run;
+
+if (require.main === module) {
+  run();
+}

tests/main.test.js

@@ -1,2 +1,6 @@
 /* eslint-disable no-undef */
-test('that tests work', () => {});
+describe('Create release', () => {
+  test('Create release endpoint is called', async () => {});
+
+  test('Outputs are set', async () => {});
+});