@krassowski/jupyterlab-lsp/lib/editor_integration/cm_adapter.spec.js

Language Server Protocol integration for JupyterLab

import { expect } from 'chai';
import { CodeMirrorIntegration } from './codemirror';
import { FileEditorFeatureTestEnvironment } from './testutils';
describe('CodeMirrorAdapter', () => {
    let env;
    beforeEach(() => (env = new FileEditorFeatureTestEnvironment()));
    afterEach(() => env.dispose());
    describe('Works with VirtualFileEditor', () => {
        it('updates on change', async () => {
            class UpdateReceivingFeature extends CodeMirrorIntegration {
                constructor() {
                    super(...arguments);
                    this.received_update = false;
                    this.last_change = null;
                }
                afterChange(change, root_position) {
                    this.received_update = true;
                    this.last_change = change;
                    this.last_change_position = root_position;
                }
            }
            await env.adapter.widget.context.initialize(true);
            await env.adapter.widget.context.ready;
            await env.adapter.initialized;
            let feature = env.init_integration({
                constructor: UpdateReceivingFeature,
                id: 'UpdateReceivingFeature'
            });
            await env.adapter.update_finished;
            expect(feature.received_update).to.equal(false);
            env.ce_editor.model.value.text = 'fo';
            await env.adapter.update_finished;
            expect(feature.received_update).to.equal(true);
            expect(feature.last_change.text[0]).to.equal('fo');
        });
    });
});
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