Update test framework to Angular 10 (DSP-789)

[tobiasschweizer]

resolves DSP-789

Update test framework from Angular 9 to 10.

TODO: resolve problems with libs built with CommonJS module:

• dsp-js (to be resolved on this PR)
• json2typescript (there should be a new version soon on npm)
• JDNConvertibleCalendar (must be fixed in new version to be published on npm)

TS config:

• https://www.typescriptlang.org/docs/handbook/compiler-options.html
• Option resolveJsonModule doesn't work without esModuleInterop microsoft/TypeScript#25400
• resolveJsonModule with --module amd microsoft/TypeScript#25755
• https://stackoverflow.com/questions/41993811/understanding-target-and-module-in-tsconfig
• https://medium.com/@tommedema/typescript-confusion-tsconfig-json-module-moduleresolution-target-lib-explained-65db2c44b491

Angular 10:

• https://blog.angular.io/version-10-of-angular-now-available-78960babd41

[tobiasschweizer]

karma.conf.js:

Under the hood Karma uses ts-node to transpile TypeScript to JavaScript. If the resolved tsconfig.json has module configured as ES formats. You might get errors like SyntaxError: Unexpected token. This is due that in Node ES module formats are not supported. To overcome this issue you need to configure ts-node to use commonjs module format.

http://karma-runner.github.io/5.0/config/configuration-file.html

Now we have a situation where the library is built for production with the settings

dsp-js-lib/tsconfig.json

Line 11 in 65389df

"module": "es6",

but for the unit tests with Karma, this setting is used:

dsp-js-lib/karma.conf.js

Line 44 in 65389df

"module": "commonjs",

In short, the unit tests build (transpile) the JS code with different settings so it is unclear whether this could lead to bugs which cannot be detected. However, the E2E use the library with its productive build options.

Karma:

• https://stackoverflow.com/questions/58384179/syntaxerror-cannot-use-import-statement-outside-a-module/59399717#59399717
• Testing with es6 modules karma-runner/karma#3335

[subotic]

LGTM!