# test.build/core/converters/build.converter.test.ts

> 64 lines of code and 0 definitions.

Tree: Codebase Testing
Language: typescript
Canonical: https://banes-lab.com/anatomy/testing#file-testing-test-build-core-converters-build-converter-test-ts
Source text: https://banes-lab.com/source/testing/test.build/core/converters/build.converter.test.ts.txt

Listed in [test.build/core/converters](https://banes-lab.com/api/source/testing/test.build/core/converters.md), after [test.build/core/converters/browser.converter.test.ts](https://banes-lab.com/source/testing/test.build/core/converters/browser.converter.test.ts.md) and before [test.build/core/converters/catalog.converter.test.ts](https://banes-lab.com/source/testing/test.build/core/converters/catalog.converter.test.ts.md).

## Contained in

- [test.build/core/converters](https://banes-lab.com/anatomy/testing/folder-testing-test-build-core-converters.md)

## Source

```typescript
import { ADDRESS, GRAPH, PAGE } from "./site.fixture.ts";
import {
    buildRoutesOf,
    locationsOf,
    pngPixelsOf,
    readArtifact,
    tabIdsOf,
} from "@banes-lab/build-scripts/core/converters/build.converter.ts";
import { describe, expect, it } from "vitest";
import { Buffer } from "node:buffer";

describe("pngPixelsOf", () => {
    it("multiplies the width and height a PNG header declares, and reads nothing from another format", () => {
        const header = Buffer.alloc(24);
        Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]).copy(header);
        header.writeUInt32BE(1200, 16);
        header.writeUInt32BE(900, 20);
        expect(pngPixelsOf(header)).toBe(1_080_000);
        expect(pngPixelsOf(Buffer.from("GIF89a"))).toBeNull();
        expect(pngPixelsOf(header.subarray(0, 20))).toBeNull();
    });
});

describe("readArtifact", () => {
    it("reads the title, description, robots, canonical, alternates, links and the main text out of a built page", () => {
        expect(readArtifact(PAGE)).toStrictEqual({
            alternates: { json: null, markdown: null },
            canonical: ADDRESS,
            description: "The terms.",
            links: [],
            robots: "index, follow",
            schema: GRAPH,
            text: "Real text",
            title: "Terms",
        });
    });
});

describe("locationsOf", () => {
    it("reads every location in document order and stops at an unclosed one", () => {
        expect(locationsOf(`<loc>${ADDRESS}</loc><loc>https://example.test/</loc><loc>open`)).toStrictEqual([
            ADDRESS,
            "https://example.test/",
        ]);
    });
});

describe("buildRoutesOf", () => {
    it("routes each page at its own path and each tab after the first at its tab link", () => {
        const payloads = new Map([
            ["terms", JSON.stringify({ content: { tabs: [{ id: "intro" }, { id: "guide" }] } })],
        ]);
        const routes = buildRoutesOf(["home", "terms"], (page) => payloads.get(page) ?? null);
        expect(routes.map((route) => [route.page, route.tab])).toStrictEqual([
            ["home", null],
            ["terms", null],
            ["terms", "guide"],
        ]);
        expect(routes[2]?.path).not.toBe(routes[1]?.path);
    });
});

describe("tabIdsOf", () => {
    it("reads the tab ids out of a tabbed payload and nothing out of any other", () => {
        const tabbed = JSON.stringify({ content: { kind: "tabbed", tabs: [{ id: "intro" }, { id: "guide" }] } });
        expect(tabIdsOf(tabbed)).toStrictEqual(["intro", "guide"]);
        expect(tabIdsOf(JSON.stringify({ content: { kind: "home" } }))).toStrictEqual([]);
    });
});
```