init the awkward code

static/html/jspaint/cypress/support/commands.js

@@ -0,0 +1,14 @@
+import { addMatchImageSnapshotCommand } from 'cypress-image-snapshot/command';
+addMatchImageSnapshotCommand({
+	failureThreshold: 0,
+	failureThresholdType: 'pixel',
+	customDiffConfig: { threshold: 0 },
+	capture: 'viewport',
+});
+Cypress.Commands.add("setResolution", (size) => {
+	if (Cypress._.isArray(size)) {
+		cy.viewport(size[0], size[1]);
+	} else {
+		cy.viewport(size);
+	}
+})

static/html/jspaint/cypress/support/index.js

@@ -0,0 +1,7 @@
+// ***********************************************************
+// This support/index.js is processed and
+// loaded automatically before your test files.
+//
+// https://on.cypress.io/configuration
+
+import './commands'