Refactor mock-data for weather-tests generation (#3000)

Refactored the mock data generation for the tests so we can use plain
JSON files for the data and read it in a more general way.

Comments welcome!

Co-authored-by: veeck <michael@veeck.de>

tests/utils/test_sequencer.js

@@ -0,0 +1,26 @@
+const TestSequencer = require("@jest/test-sequencer").default;
+
+class CustomSequencer extends TestSequencer {
+	sort(tests) {
+		const orderPath = ["unit", "e2e", "electron"];
+		return tests.sort((testA, testB) => {
+			let indexA = -1;
+			let indexB = -1;
+			const reg = ".*/tests/([^/]*).*";
+
+			let matchA = new RegExp(reg, "g").exec(testA.path);
+			if (matchA.length > 0) indexA = orderPath.indexOf(matchA[1]);
+
+			let matchB = new RegExp(reg, "g").exec(testB.path);
+			if (matchB.length > 0) indexB = orderPath.indexOf(matchB[1]);
+
+			if (indexA === indexB) return 0;
+
+			if (indexA === -1) return 1;
+			if (indexB === -1) return -1;
+			return indexA < indexB ? -1 : 1;
+		});
+	}
+}
+
+module.exports = CustomSequencer;