Migrate components to use jest (#793)

* Migrate components to use jest (tests fail)

* Fix failing tests

* Fix linting errors

components/jest.config.js

@@ -0,0 +1,17 @@
+const { pathsToModuleNameMapper } = require("ts-jest");
+
+const { compilerOptions } = require("./tsconfig");
+
+module.exports = {
+  name: "angular",
+  displayName: "component library tests",
+  preset: "jest-preset-angular",
+  testMatch: ["**/+(*.)+(spec).+(ts)"],
+  setupFilesAfterEnv: ["<rootDir>/spec/test.ts"],
+  collectCoverage: true,
+  coverageReporters: ["html", "lcov"],
+  coverageDirectory: "coverage",
+  moduleNameMapper: pathsToModuleNameMapper(compilerOptions?.paths || {}, {
+    prefix: "<rootDir>/",
+  }),
+};