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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertThrows } from "./test_util.ts";
// @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
const format = Deno[Deno.internal].jupyter.formatInner;
Deno.test("Deno.jupyter is not available", () => {
assertThrows(
() => Deno.jupyter,
"Deno.jupyter is only available in `deno jupyter` subcommand.",
);
});
export async function assertFormattedAs(obj: unknown, result: object) {
const formatted = await format(obj);
assertEquals(formatted, result);
}
Deno.test("display(canvas) creates a PNG", async () => {
// Let's make a fake Canvas with a fake Data URL
class FakeCanvas {
toDataURL() {
return "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAAXNSR0IArs4c6QAAAARzQklUCAgICHwIZIgAAAAVSURBVAiZY/zPwPCfAQ0woQtQQRAAzqkCCB/D3o0AAAAASUVORK5CYII=";
}
}
const canvas = new FakeCanvas();
await assertFormattedAs(canvas, {
"image/png":
"iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAAXNSR0IArs4c6QAAAARzQklUCAgICHwIZIgAAAAVSURBVAiZY/zPwPCfAQ0woQtQQRAAzqkCCB/D3o0AAAAASUVORK5CYII=",
});
});
Deno.test(
"class with a Symbol.for('Jupyter.display') function gets displayed",
async () => {
class Example {
x: number;
constructor(x: number) {
this.x = x;
}
[Symbol.for("Jupyter.display")]() {
return { "application/json": { x: this.x } };
}
}
const example = new Example(5);
// Now to check on the broadcast call being made
await assertFormattedAs(example, { "application/json": { x: 5 } });
},
);
Deno.test(
"class with an async Symbol.for('Jupyter.display') function gets displayed",
async () => {
class Example {
x: number;
constructor(x: number) {
this.x = x;
}
async [Symbol.for("Jupyter.display")]() {
await new Promise((resolve) => setTimeout(resolve, 0));
return { "application/json": { x: this.x } };
}
}
const example = new Example(3);
// Now to check on the broadcast call being made
await assertFormattedAs(example, { "application/json": { x: 3 } });
},
);
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