Switch test runner to jest

.travis.yml

@@ -8,4 +8,4 @@ cache:
 before_script:
   - npm prune
 after_success:
-  - './node_modules/.bin/nyc report --reporter=text-lcov | ./node_modules/.bin/coveralls'
+  - 'cat coverage/lcov.info | node_modules/.bin/coveralls'

lib/__tests__/reducer.spec.js

@@ -1,33 +1,32 @@
-import test from 'ava';
 import reducer from '../reducer';
 
-test('refactor-start', t => {
+test('refactor-start', () => {
   const state = reducer(undefined, {
     type: 'refactor-start',
   });
 
-  t.deepEqual(state, {
+  expect(state).toEqual({
     refactorInProgress: true,
   });
 });
 
-test('refactor-end', t => {
+test('refactor-end', () => {
   const state = reducer(undefined, {
     type: 'refactor-end',
   });
 
-  t.deepEqual(state, {
+  expect(state).toEqual({
     refactorInProgress: false,
   });
 });
 
-test('unknown action type', t => {
+test('unknown action type', () => {
   const initialState = {
     refactorInProgress: false,
   };
   const state = reducer(initialState, {
     type: 'some-unknown-type',
   });
 
-  t.true(initialState === state);
+  expect(initialState).toBe(state);
 });

package.json

@@ -46,7 +46,6 @@
     "refactoring-codemods": "0.3.2"
   },
   "devDependencies": {
-    "ava": "^0.16.0",
     "babel-eslint": "^6.1.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-preset-es2015": "^6.9.0",
@@ -62,19 +61,14 @@
     "eslint-plugin-jsx-a11y": "^2.0.1",
     "eslint-plugin-react": "^6.0.0",
     "flow-bin": "^0.32.0",
-    "nuclide": "^0.167.0",
-    "nyc": "^8.1.0"
+    "jest": "^15.1.1",
+    "nuclide": "^0.167.0"
   },
   "scripts": {
     "test": "npm run test:flow && npm run test:lint && npm run test:unit",
     "test:flow": "flow check",
     "test:lint": "eslint .",
-    "test:unit": "nyc ava"
-  },
-  "ava": {
-    "require": [
-      "babel-register"
-    ]
+    "test:unit": "jest --coverage"
   },
   "babel": {
     "plugins": [
@@ -93,7 +87,8 @@
   },
   "eslintConfig": {
     "env": {
-      "browser": true
+      "browser": true,
+      "jest": true
     },
     "extends": "airbnb",
     "parser": "babel-eslint",