I am trying to unit test my aurelia custom element, which looks like below.
// BaseText.ts
import { bindable } from "aurelia-framework";
import { BaseI18N } from "aurelia-i18n";
export class BaseText extends BaseI18N {
@bindable public value: string;
@bindable public i18nKey: string;
}
// NormalText.ts
export class NormalTextCustomElement extends BaseText {}
// NormalText.html
<template>
<span t.bind="i18nKey">${value}</span>
</template>
Now, I want to test if I change the value of i18nKey, the translated text is shown in the element. To test that, I have written the below test case.
describe("i18n specs", () => {
let component;
beforeEach(() => {
component = StageComponent
.withResources("NormalText/NormalText")
.inView("<normal-text id='i18n1' value='Ignored Text' i18n-key='test'></normal-text>");
component.bootstrap((aurelia: Aurelia) => aurelia.use
.standardConfiguration()
.plugin(PLATFORM.moduleName("aurelia-i18n"), (instance) => {
const aliases = ["t"];
TCustomAttribute.configureAliases(aliases);
return instance.setup({
attributes: aliases,
fallbackLng: "en",
lng: "en",
resources: { //<-- translation resources
en: {
translation: {
test: "English test"
}
}
}
});
}));
});
it("Should render the translated text with a i18nKey", (done) => {
component
.create(bootstrap)
.then(() => {
const spanElement = document.querySelector('normal-text#i18n1>span');
expect(spanElement.textContent.trim()).toBe('English test');
})
.catch(e => { console.log(e.toString()) })
.finally(() => {
component.dispose();
done();
});
});
});
Now the problem is that this test case fails intermittently, which surely is going to be a problem with CI. I suspect that it has something to do it the initialization of i18next, and the test case is running before the initialization is complete. Though I am not very sure about this hypothesis.
What should I change, so that this test case becomes deterministic?
Additional info:
- This test case succeeds if it runs before every other view related test cases.
- I have created a GitHub repo, so that interested reader/user can reproduce the problem. Please keep in mind that you might have run the tests multiple times to replicate the issue.
P.S. I have asked the same question on SO. A response here or in SO, would be really great 
Thank You.
