Colorful diff for test failures with database checks

[simonschaufi]

Instead of the plaintext result of a similar result from the database, I came up with the idea of actually creating a diff that is colorful and immediately shows me what is wrong instead of manually comparing the similar result with my expected one.

Here is an example output:

There was 1 failure:

1) Vendor\Package\Tests\Functional\Controller\Api\ArticleNumberApiControllerTest::generateArticleNumberAction
Failed asserting that a row in the table [tx_package_domain_model_article] matches the attributes: 
{
    "article_number": "260278Q962",
    "bezeichnung": "Gabel iso M4 auf 1,6mm gedr. Buchse, 0,50m",
    "bezeichnung_en": "Gabel iso M4 on 1,6mm gedr. Buchse, 0,50m",
    "bezeichnung_fr": "Gabel iso M4 sur 1,6mm gedr. Buchse, 0,50m",
    "bezeichnung_es": "Gabel iso M4 a 1,6mm gedr. Buchse, 0,50m",
    "zusatz": "Konfektioniertes Kabel mit 0,5mm², H05V-K, rot",
    "zusatz_en": "Assembled cable with 0,5mm², H05V-K, rojo",
    "zusatz_fr": "Câble confectionné avec 0,5mm², H05V-K, rojo",
    "zusatz_es": "Cable confeccionado con 0,5mm², H05V-K, rojo",
    "lang_text": "Hersteller Steckerverbinder: ---\/MURRELEKTRONIK\nKabel: geprüft",
    "lang_text_en": "Manufacturer Connectors: ---\/MURRELEKTRONIK\nCable: tested",
    "lang_text_fr": "Fabricant des connecteurs: ---\/MURRELEKTRONIK\nCâble: testé",
    "lang_text_es": "Fabricante de los conectores: ---\/MURRELEKTRONIK\nCable: probado"
}

Found some similar results that didn't match exactly:

--- Diff for result #1 of table tx_package_domain_model_article ---

    ---------- begin diff ----------
@@ @@
 {
     "article_number": "260278Q962",
     "bezeichnung": "Gabel iso M4 auf 1,6mm gedr. Buchse, 0,50m",
-    "bezeichnung_en": "Gabel iso M4 on 1,6mm gedr. Buchse, 0,50m",
-    "bezeichnung_fr": "Gabel iso M4 sur 1,6mm gedr. Buchse, 0,50m",
-    "bezeichnung_es": "Gabel iso M4 a 1,6mm gedr. Buchse, 0,50m",
+    "bezeichnung_en": "Forked ins M4 on 1,6mm turned socket, 0,50m",
+    "bezeichnung_fr": "Fourche isolé M4 sur 1,6mm contact à sertir déc. (f), 0,50m",
+    "bezeichnung_es": "Ahorquillado aislado M4 a 1,6mm contacto girado hembra, 0,50m",
     "zusatz": "Konfektioniertes Kabel mit 0,5mm², H05V-K, rot",
-    "zusatz_en": "Assembled cable with 0,5mm², H05V-K, rojo",
-    "zusatz_fr": "Câble confectionné avec 0,5mm², H05V-K, rojo",
+    "zusatz_en": "Assembled cable with 0,5mm², H05V-K, red",
+    "zusatz_fr": "Câble confectionné avec 0,5mm², H05V-K, rouge",
     "zusatz_es": "Cable confeccionado con 0,5mm², H05V-K, rojo",
    ----------- end diff -----------
.

Would you welcome such an improvement? I have integrated the differ from https://github.com/sebastianbergmann/diff