Auto-generate basic fixture when generating codemod.

Author: Robert Jackson

README.md

@@ -32,10 +32,16 @@ codemod-cli generate codemod <name of codemod>
 ```
 
 This will setup a new jscodeshift codemod within your project at `transforms/<name of codemod>/index.js`
-along with a test harness, README, and fixture directory.
+along with a test harness, README, fixture directory, and an initial set of input/output fixtures.
 
-Now that we have a codemod, we can begin generating fixtures for it. We use fixtures as a convienient
-way to represent the expected output for a given input. To generate a new fixture, run the following:
+Once you have tweaked your codemod and its fixtures to your liking, it is time to run your tests:
+
+```
+codemod-cli test
+```
+
+As you develop your codemod you may need additional fixtures (e.g. to test various combinations of
+inputs). To generate a new fixture, run the following:
 
 ```
 codemod-cli generate fixture <name of codemod> <name of fixture>
@@ -44,11 +50,6 @@ codemod-cli generate fixture <name of codemod> <name of fixture>
 This sets up two new files in `transforms/<name of codemod>/__testfixtures__/` using the fixture name
 you provided. These fixtures are used by the testing harness to verify that your codemod is working properly.
 
-Once you have tweaked your codemod and its fixtures to your liking, it is time to run your tests:
-
-```
-codemod-cli test
-```
 
 Contributing
 ------------------------------------------------------------------------------

commands/local/generate/codemod.js

@@ -8,11 +8,12 @@ module.exports.builder = function builder(yargs) {
 };
 
 module.exports.handler = function handler(options) {
-  let { codemodName } = options;
-  let codemodDir = `${process.cwd()}/transforms/${codemodName}`;
-
   const fs = require('fs-extra');
   const { stripIndent } = require('common-tags');
+  const generateFixture = require('./fixture').handler;
+
+  let { codemodName } = options;
+  let codemodDir = `${process.cwd()}/transforms/${codemodName}`;
 
   fs.outputFileSync(
     `${codemodDir}/index.js`,
@@ -48,4 +49,6 @@ module.exports.handler = function handler(options) {
     'utf8'
   );
   fs.outputFileSync(`${codemodDir}/README.md`, `# ${codemodName}\n`, 'utf8');
+
+  generateFixture({ codemodName, fixtureName: 'basic' });
 };

commands/local/generate/fixture.js

@@ -12,11 +12,10 @@ module.exports.builder = function builder(yargs) {
 };
 
 module.exports.handler = function handler(options) {
-  let { codemodName, fixtureName } = options;
-  let codemodDir = `${process.cwd()}/transforms/${codemodName}`;
-
   const fs = require('fs-extra');
 
+  let { codemodName, fixtureName } = options;
+  let codemodDir = `${process.cwd()}/transforms/${codemodName}`;
   let fixturePath = `${codemodDir}/__testfixtures__/${fixtureName}`;
 
   fs.outputFileSync(`${fixturePath}.input.js`, '');

tests/cli-test.js

@@ -77,6 +77,9 @@ QUnit.module('codemod-cli', function(hooks) {
             '.gitkeep',
             'main/',
             'main/README.md',
+            'main/__testfixtures__/',
+            'main/__testfixtures__/basic.input.js',
+            'main/__testfixtures__/basic.output.js',
             'main/index.js',
             'main/test.js',
           ]);
@@ -102,6 +105,8 @@ QUnit.module('codemod-cli', function(hooks) {
             'main/',
             'main/README.md',
             'main/__testfixtures__/',
+            'main/__testfixtures__/basic.input.js',
+            'main/__testfixtures__/basic.output.js',
             'main/__testfixtures__/this-dot-owner.input.js',
             'main/__testfixtures__/this-dot-owner.output.js',
             'main/index.js',