add jest-canvas-mock to silence a bunch of warnings

without this we get a bunch of warnings from our jest tests like:
Error: Not implemented: HTMLCanvasElement.prototype.getContext …

test plan:
you shouldn’t see those ^ messages in the jest logs

Change-Id: Ib257d4a6b40f4b4118f273729080e722afa3432a
Reviewed-on: https://gerrit.instructure.com/163515
Tested-by: Jenkins
Reviewed-by: Clay Diffrient <cdiffrient@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>

jest.config.js

@@ -13,6 +13,7 @@ module.exports = {
   reporters: [ "default", "jest-junit" ],
   setupFiles: [
     'jest-localstorage-mock',
+    'jest-canvas-mock',
     '<rootDir>/jest/jest-setup.js'
   ],
   testMatch: [

package.json

@@ -160,6 +160,7 @@
     "istanbul-instrumenter-loader": "^3",
     "istanbul-merge": "^1.1.1",
     "jest": "^23",
+    "jest-canvas-mock": "^1",
     "jest-junit": "^5",
     "jest-localstorage-mock": "^2",
     "json-loader": "^0.5.7",
@@ -239,10 +240,8 @@
     "jquery": "https://github.com/ryankshaw/jquery.git#a755a3e9c99d5a70d8ea570836f94ae1ba56046d",
     "canvas-rce/**/babel-helper-evaluate-path": "0.4.1",
     "canvas-quizzes/grunt-contrib-jasmine/jasmine-core": "2.6.4",
-    "graphael": "this is just here so yarn.lock looks the same whether the analytics plugin is checked out or not",
     "graphael": "https://github.com/ryankshaw/graphael.git",
     "karma": "2.0.2",
-    "node-sass": "if we let node-sass upgrade to recent versions, it causes: SIS-3125",
     "node-sass": "4.7.2"
   }
 }

packages/canvas-planner/jest.config.js

@@ -25,6 +25,7 @@ module.exports = {
     'enzyme-to-json/serializer'
   ],
   setupFiles: [
+    'jest-canvas-mock',
     './jest-env.js'
   ],
   testPathIgnorePatterns: [

packages/canvas-planner/package.json

@@ -103,6 +103,7 @@
     "identity-obj-proxy": "^3.0.0",
     "lint-staged": "^7",
     "jest": "^23",
+    "jest-canvas-mock": "^1",
     "mockdate": "^2.0.2",
     "moxios": "^0.4.0",
     "npm-run-all": "^4",

yarn.lock

@@ -8734,6 +8734,10 @@ jasmine_xhr@1.0.2:
   dependencies:
     sinon "^1.10.3"
 
+jest-canvas-mock@^1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/jest-canvas-mock/-/jest-canvas-mock-1.1.0.tgz#f6ed0998b6be3ae2b7e095d7173441ae62cc831e"
+
 jest-changed-files@^23.2.0:
   version "23.2.0"
   resolved "https://registry.yarnpkg.com/jest-changed-files/-/jest-changed-files-23.2.0.tgz#a145a6e4b66d0129fc7c99cee134dc937a643d9c"