e2e test

e2e/__tests__/__snapshots__/transform.test.js.snap

@@ -26,3 +26,12 @@ All files   |    83.33 |      100 |       50 |       80 |                   |
 ------------|----------|----------|----------|----------|-------------------|
 "
 `;
+
+exports[`transformer-config instruments only specific files and collects coverage 1`] = `
+"------------|----------|----------|----------|----------|-------------------|
+File        |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
+------------|----------|----------|----------|----------|-------------------|
+All files   |    83.33 |      100 |       50 |       80 |                   |
+ Covered.js |    83.33 |      100 |       50 |       80 |                13 |
+------------|----------|----------|----------|----------|-------------------|"
+`;

e2e/__tests__/transform.test.js

@@ -133,3 +133,30 @@ describe('ecmascript-modules-support', () => {
     expect(json.numTotalTests).toBeGreaterThanOrEqual(1);
   });
 });
+
+describe('transformer-config', () => {
+  const dir = path.resolve(__dirname, '..', 'transform/transformer-config');
+
+  beforeEach(() => {
+    run('yarn', dir);
+  });
+
+  it('runs transpiled code', () => {
+    // --no-cache because babel can cache stuff and result in false green
+    const {json} = runWithJson(dir, ['--no-cache']);
+    console.log(json);
+    expect(json.success).toBe(true);
+    expect(json.numTotalTests).toBeGreaterThanOrEqual(1);
+  });
+
+  it('instruments only specific files and collects coverage', () => {
+    const {stdout} = runJest(dir, ['--coverage', '--no-cache'], {
+      stripAnsi: true,
+    });
+    expect(stdout).toMatch('Covered.js');
+    expect(stdout).not.toMatch('NotCovered.js');
+    expect(stdout).not.toMatch('ExcludedFromCoverage.js');
+    // coverage result should not change
+    expect(stdout).toMatchSnapshot();
+  });
+});

e2e/transform/transformer-config/.babelrc

@@ -0,0 +1 @@
+{}

e2e/transform/transformer-config/NotCovered.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const thisFunctionIsNeverInstrumented = () => null;
+
+module.exports = {
+  thisFunctionIsNeverInstrumented,
+};

e2e/transform/transformer-config/__tests__/transformer-config.test.js

@@ -0,0 +1,15 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+require('../this-directory-is-covered/ExcludedFromCoverage');
+
+it('strips flowtypes using babel-jest and config passed to transformer', () => {
+  const a: string = 'a';
+  expect(a).toBe('a');
+});

e2e/transform/transformer-config/package.json

@@ -0,0 +1,25 @@
+{
+  "dependencies": {
+    "babel-plugin-transform-flow-strip-types": "6.8.0"
+  },
+  "jest": {
+    "collectCoverageOnlyFrom": {
+      "<rootDir>/this-directory-is-covered/Covered.js": true,
+      "<rootDir>/this-directory-is-covered/ExcludedFromCoverage.js": true
+    },
+    "coveragePathIgnorePatterns": [
+      "ExcludedFromCoverage"
+    ],
+    "testEnvironment": "node",
+    "transformer": {
+      "\\.js$": [
+        "babel-jest",
+        {
+          "plugins": [
+            "babel-plugin-transform-flow-strip-types"
+          ]
+        }
+      ]
+    }
+  }
+}

e2e/transform/transformer-config/this-directory-is-covered/Covered.js

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const thisFunctionIsCovered = (): null => null;
+
+thisFunctionIsCovered();
+
+const thisFunctionIsNotCovered = (): void => {
+  throw new Error('Never Called');
+};
+
+module.exports = {
+  thisFunctionIsCovered,
+  thisFunctionIsNotCovered,
+};

e2e/transform/transformer-config/this-directory-is-covered/ExcludedFromCoverage.js

@@ -0,0 +1,15 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+require('./Covered');
+require('../NotCovered');
+
+const thisFunctionIsNeverInstrumented = () => null;
+
+module.exports = {
+  thisFunctionIsNeverInstrumented,
+};

e2e/transform/transformer-config/yarn.lock

@@ -0,0 +1,34 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+babel-plugin-syntax-flow@^6.8.0:
+  version "6.18.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-flow/-/babel-plugin-syntax-flow-6.18.0.tgz#4c3ab20a2af26aa20cd25995c398c4eb70310c8d"
+  integrity sha1-TDqyCiryaqIM0lmVw5jE63AxDI0=
+
+babel-plugin-transform-flow-strip-types@6.8.0:
+  version "6.8.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-flow-strip-types/-/babel-plugin-transform-flow-strip-types-6.8.0.tgz#2351d85e3a52152e1a55d3f08ae635e21ece17a0"
+  integrity sha1-I1HYXjpSFS4aVdPwiuY14h7OF6A=
+  dependencies:
+    babel-plugin-syntax-flow "^6.8.0"
+    babel-runtime "^6.0.0"
+
+babel-runtime@^6.0.0:
+  version "6.23.0"
+  resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.23.0.tgz#0a9489f144de70efb3ce4300accdb329e2fc543b"
+  integrity sha1-CpSJ8UTecO+zzkMArM2zKeL8VDs=
+  dependencies:
+    core-js "^2.4.0"
+    regenerator-runtime "^0.10.0"
+
+core-js@^2.4.0:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.4.1.tgz#4de911e667b0eae9124e34254b53aea6fc618d3e"
+  integrity sha1-TekR5mew6ukSTjQlS1OupvxhjT4=
+
+regenerator-runtime@^0.10.0:
+  version "0.10.4"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.4.tgz#74cb6598d3ba2eb18694e968a40e2b3b4df9cf93"
+  integrity sha1-dMtlmNO6LrGGlOlopA4rO035z5M=