use fixed timezone for jest tests

scm-ui/jest-preset/jest-preset.js

@@ -3,6 +3,13 @@ const rootDir = path.resolve(__dirname, "..");
 const reportDirectory = path.join(rootDir, "target", "jest-reports");
 const mockDirectory = path.resolve(__dirname, "src", "__mocks__");
 
+// Set timezone for tests, this is required to get same date values
+// accross diferent machines such ci-server and dev box.
+// We have to set the timezone as soon as possible, because Date will
+// cache the value.
+// @see https://stackoverflow.com/questions/56261381/how-do-i-set-a-timezone-in-my-jest-config
+process.env.TZ = "Europe/Berlin";
+
 module.exports = {
   rootDir,
   transform: {