Editor: Fix failing unit test for i18n support in theme.json

As part of the change, I also did some code reorganization to match with how other test fixtures are handled.

Follow-up [50959].

See #52991.



git-svn-id: https://develop.svn.wordpress.org/trunk@50960 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/data/languages/themes/fse-pl_PL.po

@@ -0,0 +1,31 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"POT-Creation-Date: 2015-12-31 16:31+0100\n"
+"PO-Revision-Date: 2021-03-15 13:10+0100\n"
+"Language: pl_PL\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Generator: Poedit 2.4.2\n"
+"X-Poedit-Basepath: .\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Poedit-KeywordsList: __;_e;_x:1,2c;_ex:1,2c;_n:1,2;_nx:1,2,4c;_n_noop:1,2;"
+"_nx_noop:1,2,3c;esc_attr__;esc_html__;esc_attr_e;esc_html_e;esc_attr_x:1,2c;"
+"esc_html_x:1,2c\n"
+"X-Textdomain-Support: yes\n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"X-Poedit-SearchPath-0: .\n"
+
+msgctxt "Custom template name"
+msgid "Homepage template"
+msgstr "Szablon strony głównej"
+
+msgctxt "Color name"
+msgid "Light"
+msgstr "Jasny"
+
+msgctxt "Color name"
+msgid "Dark"
+msgstr "Ciemny"

tests/phpunit/data/themedir1/fse/index.php

@@ -0,0 +1,4 @@
+<?php
+/**
+ * Dummy theme.
+ */

tests/phpunit/data/themedir1/fse/style.css

@@ -0,0 +1,7 @@
+/*
+Theme Name: FSE Theme
+Theme URI: https://wordpress.org/
+Description: For testing purposes only.
+Version: 1.0.0
+Text Domain: fse
+*/

tests/phpunit/data/themedir1/fse/theme.json

@@ -0,0 +1,45 @@
+{
+	"version": 1,
+	"settings": {
+		"color": {
+			"palette": [
+				{
+					"slug": "light",
+					"name": "Light",
+					"color": "#f5f7f9"
+				},
+				{
+					"slug": "dark",
+					"name": "Dark",
+					"color": "#000"
+				}
+			],
+			"custom": false
+		},
+		"blocks": {
+			"core/paragraph": {
+				"color": {
+					"palette": [
+						{
+							"slug": "light",
+							"name": "Light",
+							"color": "#f5f7f9"
+						}
+					]
+				}
+			}
+		}
+	},
+	"customTemplates": [
+		{
+			"name": "page-home",
+			"title": "Homepage template"
+		}
+	],
+	"templateParts": [
+		{
+			"name": "small-header",
+			"area": "header"
+		}
+	]
+}