switch tests to snapshot assertions (#958)

* install spatie/phpunit-snapshot-assertions

* switch GenerateBasicPhpdocFinal test to snapshot assertion

* use v3 of spatie/phpunit-snapshot-assertions to be PHP7.2 compatible

* add txt snapshot driver

* fix EloquentCommandTest

* replace all heredocs by snapshots

* make test compatible with old/deprecated versions

* Update composer.json

* normalize composer.json

* fix merge conflict

* Allow older snapshot versions

* normalize composer.json

Co-authored-by: Barry vd. Heuvel <[email protected]>
Co-authored-by: barryvdh <[email protected]>

composer.json

@@ -35,9 +35,13 @@
         "mockery/mockery": "^1.3",
         "orchestra/testbench": "^3 || ^4 || ^5",
         "phpro/grumphp": "^0.19.0",
+        "spatie/phpunit-snapshot-assertions": "^1.4 || ^2.2 || ^3",
         "squizlabs/php_codesniffer": "^3.5",
         "vimeo/psalm": "^3.12"
     },
+    "config": {
+        "sort-packages": true
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "2.6-dev"
@@ -62,6 +66,7 @@
         "analyze": "psalm",
         "check-style": "phpcs -p --standard=PSR12 src/",
         "fix-style": "phpcbf -p --standard=PSR12 src/",
-        "test": "phpunit"
+        "test": "phpunit",
+        "test-regenerate": "phpunit -d --update-snapshots"
     }
 }