35 lines
1011 B
JavaScript
35 lines
1011 B
JavaScript
// @ts-check
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const fs = require("fs")
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const stream = require("stream")
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const {test} = require("supertape")
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const {convert} = require("./lottie")
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const WRITE_PNG = false
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test("lottie: can convert and save PNG", async t => {
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const input = await fs.promises.readFile("test/res/lottie-bee.json", "utf8")
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const resultStream = await convert(input)
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/* c8 ignore next 3 */
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if (WRITE_PNG) {
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resultStream.pipe(fs.createWriteStream("test/res/lottie-bee.png"))
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t.fail("PNG written to /test/res/lottie-bee.png, please manually check it")
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} else {
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const expected = await fs.promises.readFile("test/res/lottie-bee.png")
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const actual = Buffer.alloc(expected.length)
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let i = 0
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await stream.promises.pipeline(
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resultStream,
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async function* (source) {
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for await (const chunk of source) {
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chunk.copy(actual, i)
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i += chunk.length
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}
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},
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new stream.PassThrough()
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)
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t.equal(i, actual.length, `allocated ${actual.length} bytes, but wrote ${i}`)
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t.deepEqual(actual, expected)
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}
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})
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