supporting test modifications

Author: Kelly Selden

test/tests.js

@@ -12,6 +12,7 @@ const {
   assertNoUnstaged,
   assertCodemodRan
 } = require('./helpers/assertions');
+const run = require('ember-cli-update/src/run');
 
 let manifest;
 let fixturesPath;
@@ -121,6 +122,10 @@ describe('runs codemods', function() {
       } = await merge({
         async beforeMerge() {
           await _merge('local', tmpPath);
+
+          if (manifest[codemod].script) {
+            await run('npm install', { cwd: tmpPath });
+          }
         }
       });
 
@@ -148,9 +153,14 @@ describe('runs codemods', function() {
       assertNoUnstaged(status);
       assertCodemodRan(status);
 
+      await fs.remove(path.join(tmpPath, 'package-lock.json'));
+
       // file is indeterminent between OS's, so ignore
       await fs.remove(path.join(tmpPath, 'MODULE_REPORT.md'));
 
+      // remove dist and node_modules before fixture compare
+      await run('git clean -fdX', { cwd: tmpPath });
+
       let nodeVersion = 'latest-node';
       if (process.env.NODE_LTS) {
         nodeVersion = 'min-node';