feat: Wait for rendering to finish before taking image snapshots

cSpell.json

@@ -6,6 +6,7 @@
     "adamiecki",
     "alois",
     "antiscript",
+    "appli",
     "applitools",
     "asciidoctor",
     "ashish",

cypress/helpers/util.js

@@ -2,7 +2,7 @@ const utf8ToB64 = (str) => {
   return window.btoa(unescape(encodeURIComponent(str)));
 };
 
-const batchId = 'mermid-batch' + new Date().getTime();
+const batchId = 'mermaid-batch' + new Date().getTime();
 
 export const mermaidUrl = (graphStr, options, api) => {
   const obj = {
@@ -46,8 +46,22 @@ export const imgSnapshotTest = (graphStr, _options, api = false, validation) =>
   if (!options.fontSize) {
     options.fontSize = '16px';
   }
+  const url = mermaidUrl(graphStr, options, api);
+  openURLAndVerifyRendering(url, options, validation);
+};
+
+export const urlSnapshotTest = (url, _options, api = false, validation) => {
+  const options = Object.assign(_options);
+  openURLAndVerifyRendering(url, options, validation);
+};
+
+export const renderGraph = (graphStr, options, api) => {
+  const url = mermaidUrl(graphStr, options, api);
+  openURLAndVerifyRendering(url, options);
+};
+
+const openURLAndVerifyRendering = (url, options, validation = undefined) => {
   const useAppli = Cypress.env('useAppli');
-  cy.log('Hello ' + useAppli ? 'Appli' : 'image-snapshot');
   const name = (options.name || cy.state('runnable').fullTitle()).replace(/\s+/g, '-');
 
   if (useAppli) {
@@ -60,82 +74,20 @@ export const imgSnapshotTest = (graphStr, _options, api = false, validation) =>
     });
   }
 
-  const url = mermaidUrl(graphStr, options, api);
-
   cy.visit(url);
+  cy.window().should('have.property', 'rendered', true);
+  cy.get('svg').should('be.visible');
+
   if (validation) {
     cy.get('svg').should(validation);
   }
-  cy.get('svg');
-  // Default name to test title
 
   if (useAppli) {
     cy.log('Check eyes' + Cypress.spec.name);
     cy.eyesCheckWindow('Click!');
-    cy.log('Closing eyes: ' + Cypress.spec.name);
+    cy.log('Closing eyes' + Cypress.spec.name);
     cy.eyesClose();
   } else {
     cy.matchImageSnapshot(name);
   }
 };
-
-export const urlSnapshotTest = (url, _options, api = false, validation) => {
-  cy.log(_options);
-  const options = Object.assign(_options);
-  if (!options.fontFamily) {
-    options.fontFamily = 'courier';
-  }
-  if (!options.sequence) {
-    options.sequence = {};
-  }
-  if (!options.sequence || (options.sequence && !options.sequence.actorFontFamily)) {
-    options.sequence.actorFontFamily = 'courier';
-  }
-  if (options.sequence && !options.sequence.noteFontFamily) {
-    options.sequence.noteFontFamily = 'courier';
-  }
-  options.sequence.actorFontFamily = 'courier';
-  options.sequence.noteFontFamily = 'courier';
-  options.sequence.messageFontFamily = 'courier';
-  if (options.sequence && !options.sequence.actorFontFamily) {
-    options.sequence.actorFontFamily = 'courier';
-  }
-  if (!options.fontSize) {
-    options.fontSize = '16px';
-  }
-  const useAppli = Cypress.env('useAppli');
-  cy.log('Hello ' + useAppli ? 'Appli' : 'image-snapshot');
-  const name = (options.name || cy.state('runnable').fullTitle()).replace(/\s+/g, '-');
-
-  if (useAppli) {
-    cy.log('Opening eyes 2' + Cypress.spec.name);
-    cy.eyesOpen({
-      appName: 'Mermaid',
-      testName: name,
-      batchName: Cypress.spec.name,
-      batchId: batchId + Cypress.spec.name,
-    });
-  }
-
-  cy.visit(url);
-  if (validation) {
-    cy.get('svg').should(validation);
-  }
-  cy.get('body');
-  // Default name to test title
-
-  if (useAppli) {
-    cy.log('Check eyes 2' + Cypress.spec.name);
-    cy.eyesCheckWindow('Click!');
-    cy.log('Closing eyes 2' + Cypress.spec.name);
-    cy.eyesClose();
-  } else {
-    cy.matchImageSnapshot(name);
-  }
-};
-
-export const renderGraph = (graphStr, options, api) => {
-  const url = mermaidUrl(graphStr, options, api);
-
-  cy.visit(url);
-};

cypress/integration/rendering/mindmap.spec.ts

@@ -1,4 +1,4 @@
-import { imgSnapshotTest, renderGraph } from '../../helpers/util.js';
+import { imgSnapshotTest } from '../../helpers/util.js';
 
 /**
  * Check whether the SVG Element has a Mindmap root
@@ -158,7 +158,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   it('rounded rect shape', () => {
     imgSnapshotTest(
@@ -172,7 +171,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   it('circle shape', () => {
     imgSnapshotTest(
@@ -186,7 +184,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   it('default shape', () => {
     imgSnapshotTest(
@@ -198,7 +195,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   it('adding children', () => {
     imgSnapshotTest(
@@ -212,7 +208,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   it('adding grand children', () => {
     imgSnapshotTest(
@@ -227,7 +222,6 @@ mindmap
       undefined,
       shouldHaveRoot
     );
-    cy.get('svg');
   });
   /* The end */
 });

cypress/platform/viewer.js

@@ -5,6 +5,13 @@ function b64ToUtf8(str) {
   return decodeURIComponent(escape(window.atob(str)));
 }
 
+// Adds a rendered flag to window when rendering is done, so cypress can wait for it.
+function markRendered() {
+  if (window.Cypress) {
+    window.rendered = true;
+  }
+}
+
 /**
  * ##contentLoaded Callback function that is called when page is loaded. This functions fetches
  * configuration for mermaid rendering and calls init for rendering the mermaid diagrams on the
@@ -39,7 +46,8 @@ const contentLoaded = async function () {
 
     await mermaid2.registerExternalDiagrams([mindmap]);
     mermaid2.initialize(graphObj.mermaid);
-    mermaid2.init();
+    await mermaid2.init();
+    markRendered();
   }
 };
 
@@ -128,6 +136,7 @@ const contentLoadedApi = function () {
       );
     }
   }
+  markRendered();
 };
 
 if (typeof document !== 'undefined') {