BlueprintAcceptanceTest fails with 'file already exists'

[knownasilya]

My code:

import * as path from 'path';
import * as fs from 'fs';
import test from 'ava';
import {
  BlueprintAcceptanceTest
} from '@denali-js/cli';

test('test outputed files', async (t) => {
  let defaultBlueprint = new BlueprintAcceptanceTest('default');
  await defaultBlueprint.run();
  let builtFile = path.join(defaultBlueprint.dir, 'dist', 'app', 'namespaces', 'application.js');
  let results = fs.readFileSync(builtFile, 'utf-8');

  t.log(results);
  t.true(results);
});

The output:

$ DEBUG=@denali* denali test -- --verbose
cli v0.1.4 [local]  @denali-js/cli:bootstrap discovering commands from addons +0ms
  @denali-js/cli:find-addons searching for addons locally in /Users/iradchenko/sandbox/denali-sockets +0ms
  @denali-js/cli:find-addons found 2 addons:
  @denali-js/cli:find-addons   - @denali-js/core [/Users/iradchenko/sandbox/denali-sockets/node_modules/@denali-js/core]
  @denali-js/cli:find-addons   - @denali-js/typescript [/Users/iradchenko/sandbox/denali-sockets/node_modules/@denali-js/typescript]
  @denali-js/cli:find-addons  +26ms
  @denali-js/cli:bootstrap found 10 commands from @denali-js/core: [ build, console, destroy, generate, install, migrate, publish, routes, server, test ]  +638ms
 | denali v0.1.2 [local]
  @denali-js/cli:bootstrap found 0 commands from @denali-js/typescript: [  ]  +1ms
  @denali-js/cli:command adding command: build +0ms
  @denali-js/cli:command adding command: console +1ms
  @denali-js/cli:command adding command: destroy <blueprint> +1ms
  @denali-js/cli:command adding command: generate <blueprint> +0ms
  @denali-js/cli:command adding command: install <addonName> +0ms
  @denali-js/cli:command adding command: migrate +0ms
  @denali-js/cli:command adding command: publish +0ms
  @denali-js/cli:command adding command: routes +1ms
  @denali-js/cli:command adding command: server +0ms
  @denali-js/cli:command adding command: test [files...] +0ms
  @denali-js/cli:command adding command: addon <name> +0ms
  @denali-js/cli:command adding command: new <name> +0ms
  @denali-js/cli:command building options for 'test' command +29ms
  @denali-js/cli:command invoking 'test' command +7ms
  @denali-js/cli:project creating project for /Users/iradchenko/sandbox/denali-sockets +0ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/test/dummy +0ms
  @denali-js/cli:builder using local builder +643ms
  @denali-js/cli:builder:dummy created builder for dummy@0.0.0 +0ms
  @denali-js/cli:builder:dummy searching for child addons in /Users/iradchenko/sandbox/denali-sockets/test/dummy +1ms
  @denali-js/cli:builder:dummy discovered child addon: @denali-js/core +12ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/test/dummy/node_modules/@denali-js/core +0ms
  @denali-js/cli:builder using local builder +593ms
  @denali-js/cli:builder:dummy>@denali-js/core created builder for @denali-js/core@0.1.2 +0ms
  @denali-js/cli:builder:dummy discovered child addon: @denali-js/eslint +612ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/test/dummy/node_modules/@denali-js/eslint +18ms
  @denali-js/cli:builder using local builder +49ms
  @denali-js/cli:builder:dummy>@denali-js/eslint created builder for @denali-js/eslint@0.1.1 +0ms
  @denali-js/cli:builder:dummy discovered child addon: @denali-js/babel +51ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/test/dummy/node_modules/@denali-js/babel +2ms
  @denali-js/cli:builder using local builder +252ms
  @denali-js/cli:builder:dummy>@denali-js/babel created builder for @denali-js/babel@0.1.1+0ms
  @denali-js/cli:builder:dummy discovered child addon: denali-sockets +253ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets +1ms
  @denali-js/cli:builder using local builder +0ms
  @denali-js/cli:builder:dummy>denali-sockets created builder for denali-sockets@0.0.1 +0ms
  @denali-js/cli:builder:dummy creating base tree from: app/,config/,lib/,blueprints/,commands/,config/,guides/,test/ +1ms
  @denali-js/cli:builder:dummy compiling +3ms
  @denali-js/cli:builder:dummy running hooks +0ms
  @denali-js/cli:builder:dummy running processParent hook from @denali-js/eslint +0ms
  @denali-js/cli:builder:dummy running processParent hook from @denali-js/babel +95ms
  @denali-js/cli:builder:dummy including @denali-js/core fragment in app bundle +229ms
  @denali-js/cli:builder:dummy>@denali-js/core is root builder: false; is developing: false; is addon under test: false; is symlinked: false; is not compiled: false +634ms
  @denali-js/cli:builder:dummy>@denali-js/core no build needed, using precompiled +0ms
  @denali-js/cli:builder:dummy including @denali-js/eslint fragment in app bundle +1ms
  @denali-js/cli:builder:dummy>@denali-js/eslint is root builder: false; is developing: false; is addon under test: false; is symlinked: false; is not compiled: false +583ms
  @denali-js/cli:builder:dummy>@denali-js/eslint no build needed, using precompiled +0ms
  @denali-js/cli:builder:dummy including @denali-js/babel fragment in app bundle +1ms
  @denali-js/cli:builder:dummy>@denali-js/babel is root builder: false; is developing: false; is addon under test: false; is symlinked: false; is not compiled: false +330ms
  @denali-js/cli:builder:dummy>@denali-js/babel no build needed, using precompiled +0ms
  @denali-js/cli:builder:dummy including denali-sockets fragment in app bundle +1ms
  @denali-js/cli:builder:dummy>denali-sockets is root builder: false; is developing: false; is addon under test: true; is symlinked: false; is not compiled: true +330ms
  @denali-js/cli:builder:dummy>denali-sockets not precompiled - building now +0ms
  @denali-js/cli:builder:dummy>denali-sockets searching for child addons in /Users/iradchenko/sandbox/denali-sockets +0ms
  @denali-js/cli:builder:dummy>denali-sockets discovered child addon: @denali-js/core +5ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/node_modules/@denali-js/core +0ms
  @denali-js/cli:builder using local builder +1ms
  @denali-js/cli:builder:dummy>denali-sockets>@denali-js/core created builder for @denali-js/core@0.1.2 +0ms
  @denali-js/cli:builder:dummy>denali-sockets discovered child addon: @denali-js/typescript +2ms
  @denali-js/cli:builder creating builder for /Users/iradchenko/sandbox/denali-sockets/node_modules/@denali-js/typescript +1ms
  @denali-js/cli:builder using local builder +284ms
  @denali-js/cli:builder:dummy>denali-sockets>@denali-js/typescript created builder for @denali-js/typescript@0.1.1 +0ms
  @denali-js/cli:builder:dummy>denali-sockets creating base tree from: app/,config/,lib/,blueprints/,commands/,config/,guides/,test/ +293ms
  @denali-js/cli:builder:dummy>denali-sockets compiling +10ms
  @denali-js/cli:builder:dummy>denali-sockets running hooks +0ms
  @denali-js/cli:builder:dummy>denali-sockets running processParent hook from @denali-js/typescript +0ms
  @denali-js/cli:builder:dummy>denali-sockets including unit tests in output +8ms
  @denali-js/cli:builder:dummy including unit tests in output +324ms
  @denali-js/cli:project building project +2s
  @denali-js/cli:project copying broccoli build output to dist +8s
  @denali-js/cli:project project build finished +34ms
✔ denali-sockets build complete (8.259s)
===> Running denali-sockets tests ...
  @denali-js/core:test:command-acceptance populating tmp/command-acceptance-test--22839yyR8
Z4aqjShD with dummy app +0ms

  6 passed
  1 failed

  acceptance › default-blueprint-test › test outputed files

  /Users/iradchenko/sandbox/denali-sockets/node_modules/@denali-js/cli/lib/test/command-acceptance.ts:136

  Rejected promise returned by test. Reason:

  Error {
    code: 'EEXIST',
    errno: -17,
    path: 'tmp/command-acceptance-test--22839yyR8Z4aqjShD/node_modules',
    syscall: 'mkdir',
    message: 'EEXIST: file already exists, mkdir \'tmp/command-acceptance-test--22839yyR8Z4aqjShD/node_modules\'',
  }

  BlueprintAcceptanceTest.populateWithDummy (node_modules/@denali-js/cli/lib/test/command-acceptance.ts:136:8)
  new CommandAcceptanceTest (node_modules/@denali-js/cli/lib/test/command-acceptance.ts:117:12)
  new BlueprintAcceptanceTest (node_modules/@denali-js/cli/lib/test/blueprint-acceptance.ts:17:5)
  Test.__dirname [as fn] (tmp/-dummy/test/acceptance/default-blueprint-test.js:9:26)

===> Tests failed 💥

[knownasilya]

Looks like https://github.com/denali-js/cli/blob/master/lib/test/command-acceptance.ts#L106 needs to be modified for the extended BlueprintAcceptanceTest class.