Toolkit: add canvas-mock to test setup (#21739)

(cherry picked from commit ed140346a7)

packages/grafana-toolkit/package.json

@@ -62,6 +62,7 @@
     "html-webpack-plugin": "^3.2.0",
     "inquirer": "^6.3.1",
     "jest": "24.8.0",
+    "jest-canvas-mock": "2.1.2",
     "jest-cli": "^24.8.0",
     "jest-coverage-badges": "^1.1.2",
     "jest-junit": "^6.4.0",

packages/grafana-toolkit/src/config/jest.plugin.config.ts

@@ -50,7 +50,7 @@ export const jestConfig = (baseDir: string = process.cwd()) => {
   const setupFile = getSetupFile(setupFilePath);
   const shimsFile = getSetupFile(shimsFilePath);
 
-  const setupFiles = [setupFile, shimsFile].filter(f => f);
+  const setupFiles = [setupFile, shimsFile, 'jest-canvas-mock'].filter(f => f);
   const defaultJestConfig = {
     preset: 'ts-jest',
     verbose: false,