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books/fyo/tests/testObservable.spec.ts
18alantom 25dacea269 test: observable
- add hasListener
2022-05-23 16:18:22 +05:30

132 lines
3.2 KiB
TypeScript

import * as assert from 'assert';
import Observable from 'fyo/utils/observable';
import 'mocha';
enum ObsEvent {
A = 'event-a',
B = 'event-b',
}
describe('Observable', function () {
const obs = new Observable();
let counter = 0;
const params = { aOne: 18, aTwo: 21, b: 42 };
const listenerAOnce = (value: number) => {
assert.strictEqual(params.aOne, value, 'listenerAOnce');
};
const listenerAEvery = (value: number) => {
if (counter === 0) {
assert.strictEqual(params.aOne, value, 'listenerAEvery 0');
} else if (counter === 1) {
assert.strictEqual(params.aTwo, value, 'listenerAEvery 1');
} else {
throw new Error("this shouldn't run");
}
counter += 1;
};
const listenerBOnce = (value: number) => {
assert.strictEqual(params.b, value, 'listenerBOnce');
};
specify('set A One', function () {
assert.strictEqual(obs.hasListener(ObsEvent.A), false, 'pre');
obs.once(ObsEvent.A, listenerAOnce);
assert.strictEqual(obs.hasListener(ObsEvent.A), true, 'non specific');
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAOnce),
true,
'specific once'
);
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAEvery),
false,
'specific every'
);
});
specify('set A Two', function () {
obs.on(ObsEvent.A, listenerAEvery);
assert.strictEqual(obs.hasListener(ObsEvent.A), true, 'non specific');
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAOnce),
true,
'specific once'
);
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAEvery),
true,
'specific every'
);
});
specify('set B', function () {
assert.strictEqual(obs.hasListener(ObsEvent.B), false, 'pre');
obs.once(ObsEvent.B, listenerBOnce);
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerBOnce),
false,
'specific false'
);
assert.strictEqual(
obs.hasListener(ObsEvent.B, listenerBOnce),
true,
'specific true'
);
});
specify('trigger A 0', async function () {
await obs.trigger(ObsEvent.A, params.aOne);
assert.strictEqual(obs.hasListener(ObsEvent.A), true, 'non specific');
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAOnce),
false,
'specific'
);
});
specify('trigger A 1', async function () {
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAEvery),
true,
'specific pre'
);
await obs.trigger(ObsEvent.A, params.aTwo);
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAEvery),
true,
'specific post'
);
});
specify('trigger B', async function () {
assert.strictEqual(
obs.hasListener(ObsEvent.B, listenerBOnce),
true,
'specific pre'
);
await obs.trigger(ObsEvent.B, params.b);
assert.strictEqual(
obs.hasListener(ObsEvent.B, listenerBOnce),
false,
'specific post'
);
});
specify('remove A', async function () {
obs.off(ObsEvent.A, listenerAEvery);
assert.strictEqual(
obs.hasListener(ObsEvent.A, listenerAEvery),
false,
'specific pre'
);
assert.strictEqual(counter, 2, 'incorrect counter');
await obs.trigger(ObsEvent.A, 777);
});
});