test(cli): introduce snapshot-based testing

- Implement basic snapshot matching in a helper file that can be later
  extracted into a standalone package

- Add few more test helpers specific for our CLI package

- Rework some of the integration tests for "controller" and "datasource"
  commands to use snapshots instead of regular expressions

Signed-off-by: Miroslav Bajtoš <[email protected]>

Author: bajtos

.prettierignore

@@ -3,6 +3,7 @@
 /docs/apidocs
 /docs/site/apidocs
 packages/cli/generators/*/templates
+packages/cli/snapshots/
 packages/tsdocs/fixtures/monorepo/docs
 packages/tsdocs/fixtures/monorepo/**/dist
 packages/tsdocs/fixtures/monorepo/**/docs

packages/cli/package-lock.json

@@ -51,6 +51,8 @@
     "json5": "^2.1.0",
     "lodash": "^4.17.15",
     "minimist": "^1.2.0",
+    "mkdirp": "^0.5.1",
+    "natural-compare": "^1.4.0",
     "pacote": "^9.5.8",
     "pluralize": "^8.0.0",
     "regenerate": "^1.4.0",
@@ -66,6 +68,7 @@
     "update-notifier": "^3.0.1",
     "url-slug": "^2.2.0",
     "validate-npm-package-name": "^3.0.0",
+    "write-file-atomic": "^3.0.0",
     "yeoman-generator": "^4.0.2"
   },
   "scripts": {