Crate icu_testdata

Expand description

icu_testdata is a unit testing crate for ICU4X.

The crate exposes data providers with stable data useful for unit testing. The data is based on a CLDR tag and a short list of locales that, together, cover a range of scenarios.

The crate exposes three kinds of providers, corresponding to the three types of constructors in ICU:

unstable, unstable_no_fallback
any, any_no_fallback
buffer, buffer_no_fallback (buffer Cargo feature)

Additionally, the metadata Cargo feature exposes the [metadata] module which contains information such as the CLDR Gitref and the list of included locales.

`bin` Cargo feature

Downloading fresh CLDR data

$ cargo run --bin --features=bin icu4x-testdata-download-sources

Regenerating data

$ cargo run --bin --features=bin icu4x-testdata-datagen

Examples

use icu::locid::locale;
use icu_provider::hello_world::*;
use icu_provider::prelude::*;

let req = DataRequest {
    locale: &locale!("en").into(),
    metadata: Default::default(),
};

assert_eq!(
    DataProvider::<HelloWorldV1Marker>::load(
        &icu_testdata::unstable(),
        req
    )
    .and_then(DataResponse::take_payload)
    .unwrap()
    .get()
    .message,
    "Hello World"
);

assert_eq!(
    BufferProvider::load_buffer(
        &icu_testdata::buffer(),
        HelloWorldV1Marker::KEY,
        req
    )
    .and_then(DataResponse::take_payload)
    .unwrap()
    .get(),
    &b"\x0bHello World"
);

assert_eq!(
    AnyProvider::load_any(
        &icu_testdata::any(),
        HelloWorldV1Marker::KEY,
        req
    )
    .and_then(AnyResponse::downcast::<HelloWorldV1Marker>)
    .and_then(DataResponse::take_payload)
    .unwrap()
    .get()
    .message,
    "Hello World"
);