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kernel.spec.ts
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kernel.spec.ts
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// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
import { expect } from 'chai';
import { UUID } from '@phosphor/coreutils';
import { toArray } from '@phosphor/algorithm';
import { Kernel } from '@jupyterlab/services';
import { expectFailure, testEmission } from '@jupyterlab/testutils';
import {
KernelTester,
makeSettings,
PYTHON_SPEC,
getRequestHandler
} from '../utils';
const PYTHON3_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
PYTHON3_SPEC.name = 'Python3';
PYTHON3_SPEC.display_name = 'python3';
describe('kernel', () => {
let defaultKernel: Kernel.IKernel;
let tester: KernelTester;
beforeAll(async () => {
defaultKernel = await Kernel.startNew();
// Start another kernel.
await Kernel.startNew();
});
afterEach(() => {
if (tester) {
tester.dispose();
}
});
afterEach(() => {
return Kernel.shutdownAll();
});
describe('Kernel.listRunning()', () => {
it('should yield a list of valid kernel ids', async () => {
const response = await Kernel.listRunning();
expect(toArray(response).length).to.be.greaterThan(0);
});
it('should accept server settings', async () => {
const serverSettings = makeSettings();
const kernel = await Kernel.startNew({ serverSettings });
const response = await Kernel.listRunning(serverSettings);
expect(toArray(response).length).to.be.greaterThan(0);
await kernel.shutdown();
});
it('should throw an error for an invalid model', async () => {
const data = { id: UUID.uuid4(), name: 'test' };
const settings = getRequestHandler(200, data);
const promise = Kernel.listRunning(settings);
await expectFailure(promise, 'Invalid kernel list');
});
it('should throw an error for an invalid response', async () => {
const settings = getRequestHandler(201, {});
const promise = Kernel.listRunning(settings);
await expectFailure(promise, 'Invalid response: 201 Created');
});
it('should throw an error for an error response', async () => {
const settings = getRequestHandler(500, {});
const promise = Kernel.listRunning(settings);
await expectFailure(promise, '');
});
});
describe('Kernel.startNew()', () => {
it('should create an Kernel.IKernel object', async () => {
const kernel = await Kernel.startNew({});
expect(kernel.status).to.equal('unknown');
await kernel.shutdown();
});
it('should accept ajax options', async () => {
const serverSettings = makeSettings();
const kernel = await Kernel.startNew({ serverSettings });
expect(kernel.status).to.equal('unknown');
await kernel.shutdown();
});
// TODO: fix this test. The idea here is that if a kernel immediately
// replies that it is dead, we still construct the kernel object and give it
// a chance to handle the dead status. When is this going to happen? A
// kernel typically doesn't immediately send its status, does it? I suppose
// it should - if we are connecting to an existing kernel, it would be nice
// to know right off if it's busy/dead/etc.
it.skip('should still start if the kernel dies', async () => {
tester = new KernelTester();
tester.initialStatus = 'dead';
const kernel = await tester.start();
await testEmission(kernel.statusChanged, {
test: (sender, state) => {
return state === 'dead';
}
});
tester.dispose();
});
it('should throw an error for an invalid kernel id', async () => {
const serverSettings = getRequestHandler(201, { id: UUID.uuid4() });
const kernelPromise = Kernel.startNew({ serverSettings });
await expectFailure(kernelPromise);
});
it('should throw an error for another invalid kernel id', async () => {
const serverSettings = getRequestHandler(201, {
id: UUID.uuid4(),
name: 1
});
const kernelPromise = Kernel.startNew({ serverSettings });
await expectFailure(kernelPromise);
});
it('should throw an error for an invalid response', async () => {
const data = { id: UUID.uuid4(), name: 'foo' };
const serverSettings = getRequestHandler(200, data);
const kernelPromise = Kernel.startNew({ serverSettings });
await expectFailure(kernelPromise, 'Invalid response: 200 OK');
});
it('should throw an error for an error response', async () => {
const serverSettings = getRequestHandler(500, {});
const kernelPromise = Kernel.startNew({ serverSettings });
await expectFailure(kernelPromise, '');
});
it('should auto-reconnect on websocket error', async () => {
tester = new KernelTester();
const kernel = await tester.start();
await kernel.ready;
const emission = testEmission(kernel.statusChanged, {
find: (k, status) => status === 'reconnecting'
});
await tester.close();
await emission;
});
});
describe('Kernel.connectTo()', () => {
it('should connect to an existing kernel', () => {
const id = defaultKernel.id;
const kernel = Kernel.connectTo(defaultKernel.model);
expect(kernel.id).to.equal(id);
kernel.dispose();
});
it('should accept server settings', () => {
const id = defaultKernel.id;
const serverSettings = makeSettings();
const kernel = Kernel.connectTo(defaultKernel.model, serverSettings);
expect(kernel.id).to.equal(id);
kernel.dispose();
});
it('should turn off comm handling in the new connection if it was enabled in first kernel', async () => {
const kernel = await Kernel.startNew();
expect(kernel.handleComms).to.be.true;
const kernel2 = Kernel.connectTo(kernel.model);
expect(kernel2.handleComms).to.be.false;
kernel.dispose();
kernel2.dispose();
});
it('should turn on comm handling in the new connection if it was disabled in all other connections', async () => {
const kernel = await Kernel.startNew({ handleComms: false });
expect(kernel.handleComms).to.be.false;
const kernel2 = Kernel.connectTo(defaultKernel.model);
expect(kernel2.handleComms).to.be.true;
kernel.dispose();
kernel2.dispose();
});
});
describe('Kernel.shutdown()', () => {
it('should shut down a kernel by id', async () => {
const k = await Kernel.startNew();
await Kernel.shutdown(k.id);
});
it('should handle a 404 error', () => {
return Kernel.shutdown(UUID.uuid4());
});
});
describe('Kernel.getSpecs()', () => {
it('should load the kernelspecs', async () => {
const specs = await Kernel.getSpecs();
expect(specs.default).to.be.ok;
});
it('should accept ajax options', async () => {
const serverSettings = makeSettings();
const specs = await Kernel.getSpecs(serverSettings);
expect(specs.default).to.be.ok;
});
it('should handle a missing default parameter', async () => {
const serverSettings = getRequestHandler(200, {
kernelspecs: { python: PYTHON_SPEC }
});
const specs = await Kernel.getSpecs(serverSettings);
expect(specs.default).to.be.ok;
});
it('should throw for a missing kernelspecs parameter', async () => {
const serverSettings = getRequestHandler(200, {
default: PYTHON_SPEC.name
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No kernelspecs found');
});
it('should omit an invalid kernelspec', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
R_SPEC.name = 1;
const serverSettings = getRequestHandler(200, {
default: 'python',
kernelspecs: {
R: R_SPEC,
python: PYTHON_SPEC
}
});
const specs = await Kernel.getSpecs(serverSettings);
expect(specs.default).to.equal('python');
expect(specs.kernelspecs['R']).to.be.undefined;
});
it('should handle an improper name', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
R_SPEC.name = 1;
const serverSettings = getRequestHandler(200, {
default: 'R',
kernelspecs: { R: R_SPEC }
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No valid kernelspecs found');
});
it('should handle an improper language', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
R_SPEC.spec.language = 1;
const serverSettings = getRequestHandler(200, {
default: 'R',
kernelspecs: { R: R_SPEC }
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No valid kernelspecs found');
});
it('should handle an improper argv', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
R_SPEC.spec.argv = 'hello';
const serverSettings = getRequestHandler(200, {
default: 'R',
kernelspecs: { R: R_SPEC }
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No valid kernelspecs found');
});
it('should handle an improper display_name', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
R_SPEC.spec.display_name = ['hello'];
const serverSettings = getRequestHandler(200, {
default: 'R',
kernelspecs: { R: R_SPEC }
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No valid kernelspecs found');
});
it('should handle missing resources', async () => {
const R_SPEC = JSON.parse(JSON.stringify(PYTHON_SPEC));
delete R_SPEC.resources;
const serverSettings = getRequestHandler(200, {
default: 'R',
kernelspecs: { R: R_SPEC }
});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'No valid kernelspecs found');
});
it('should throw an error for an invalid response', async () => {
const serverSettings = getRequestHandler(201, {});
const promise = Kernel.getSpecs(serverSettings);
await expectFailure(promise, 'Invalid response: 201 Created');
});
it('should handle metadata', async () => {
const PYTHON_SPEC_W_MD = JSON.parse(JSON.stringify(PYTHON_SPEC));
PYTHON_SPEC_W_MD.spec.metadata = { some_application: { key: 'value' } };
const serverSettings = getRequestHandler(200, {
default: 'python',
kernelspecs: { python: PYTHON_SPEC_W_MD }
});
const specs = await Kernel.getSpecs(serverSettings);
expect(specs.kernelspecs['python']).to.have.property('metadata');
const metadata = specs.kernelspecs['python'].metadata;
expect(metadata).to.have.property('some_application');
expect((metadata as any).some_application).to.have.property(
'key',
'value'
);
});
it('should handle env values', async () => {
const PYTHON_SPEC_W_ENV = JSON.parse(JSON.stringify(PYTHON_SPEC));
PYTHON_SPEC_W_ENV.spec.env = {
SOME_ENV: 'some_value',
LANG: 'en_US.UTF-8'
};
const serverSettings = getRequestHandler(200, {
default: 'python',
kernelspecs: { python: PYTHON_SPEC_W_ENV }
});
const specs = await Kernel.getSpecs(serverSettings);
expect(specs.kernelspecs['python']).to.have.property('env');
const env = specs.kernelspecs['python'].env;
expect(env).to.have.property('SOME_ENV', 'some_value');
expect(env).to.have.property('LANG', 'en_US.UTF-8');
});
});
});