test: Add tests to ensure input directory is never modified.

Author: amiller-gh

packages/@css-blocks/broccoli/test/Aggregate.ts

@@ -1,6 +1,8 @@
 import * as assert from "assert";
 
 import { TempDir, createBuilder, createTempDir } from "broccoli-test-helper";
+import * as FSTree from "fs-tree-diff";
+import * as walkSync from "walk-sync";
 
 import { CSSBlocksAggregate, Transport } from "../src/index";
 
@@ -41,8 +43,11 @@ describe("Broccoli Aggregate Plugin Test", function () {
       let output = createBuilder(pluginC);
 
       // First pass does full compile and copies all files except block files to output.
+      let preDiff = FSTree.fromEntries(walkSync.entries(input.path()));
       await output.build();
+      let postDiff = FSTree.fromEntries(walkSync.entries(input.path()));
 
+      assert.equal(preDiff.calculatePatch(postDiff).length, 0, "Input directory unchanged after build.");
       assert.deepEqual(output.changes(), {
         "test.css": "create",
         "app.css": "create",

packages/@css-blocks/broccoli/test/Analyze.ts

@@ -1,7 +1,10 @@
 import * as assert from "assert";
 
 import { GlimmerAnalyzer } from "@css-blocks/glimmer";
+
 import { TempDir, createBuilder, createTempDir } from "broccoli-test-helper";
+import * as FSTree from "fs-tree-diff";
+import * as walkSync from "walk-sync";
 
 import { CSSBlocksAnalyze, Transport } from "../src/index";
 
@@ -57,7 +60,11 @@ describe("Broccoli Analyze Plugin Test", function () {
       ));
 
       // First pass does full compile and copies all files except block files to output.
+      let preDiff = FSTree.fromEntries(walkSync.entries(input.path()));
       await output.build();
+      let postDiff = FSTree.fromEntries(walkSync.entries(input.path()));
+
+      assert.equal(preDiff.calculatePatch(postDiff).length, 0, "Input directory unchanged after build.");
       assert.ok(Object.keys(transport).length, "Transport Object populated");
       assert.ok(transport["mapping"], "Mapping property is populated in Transport Object");
       assert.ok(transport["blocks"], "Blocks property is populated in Transport Object");
@@ -79,6 +86,7 @@ describe("Broccoli Analyze Plugin Test", function () {
         }}}},
       });
       await output.build();
+      assert.equal(preDiff.calculatePatch(postDiff).length, 0, "Input directory unchanged after rebuild.");
       assert.equal(transport["css"], ".a { color: blue; } .b { color: yellow; }", "Modifications to block files trigger build but result in no output tree changes.");
       assert.deepEqual(output.changes(), {}, "Modifications to block files trigger build but result in no output tree changes.");
 

packages/@css-blocks/ember-cli/tests/dummy/app/router.js

@@ -14,7 +14,6 @@ Router.map(function() {
   this.route('addon-component');
   this.mount('in-repo-engine');
   this.mount('in-repo-lazy-engine');
-  this.route('node-modules-resolution');
 });
 
 export default Router;

packages/@css-blocks/ember-cli/tests/dummy/app/styles/node-modules-resolution.block.css

@@ -24,9 +24,6 @@
       <li>
         {{#link-to "in-repo-lazy-engine" class="test-nav-item"}}In Repo Lazy Engine{{/link-to}}
       </li>
-      <li>
-        {{#link-to "node-modules-resolution" class="test-nav-item"}}Node Module Resolution{{/link-to}}
-      </li>
     </ul>
   </nav>