toPromise() — astro Function Reference

Architecture documentation for the toPromise() function in test-utils.js from the astro codebase.

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IntegrationAdapters→ SsrAdapters→ toPromise() — astro Function Reference

Dependency Diagram

graph TD
  faadc1fc_e8ff_8aac_bad0_4c2e6c17fbde["toPromise()"]
  b0be4d0c_86b6_a283_f2af_003189bfd572["test-utils.js"]
  faadc1fc_e8ff_8aac_bad0_4c2e6c17fbde -->|defined in| b0be4d0c_86b6_a283_f2af_003189bfd572
  37bee138_718e_22c5_b294_37b0235244a2["createRequestAndResponse()"]
  37bee138_718e_22c5_b294_37b0235244a2 -->|calls| faadc1fc_e8ff_8aac_bad0_4c2e6c17fbde
  style faadc1fc_e8ff_8aac_bad0_4c2e6c17fbde fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

packages/astro/test/units/test-utils.js lines 66–85

function toPromise(res) {
	return new Promise((resolve) => {
		// node-mocks-http doesn't correctly handle non-Buffer typed arrays,
		// so override the write method to fix it.
		const write = res.write;
		res.write = function (data, encoding) {
			if (ArrayBuffer.isView(data) && !Buffer.isBuffer(data)) {
				data = Buffer.from(data.buffer);
			}
			if (typeof data === 'string') {
				data = Buffer.from(data);
			}
			return write.call(this, data, encoding);
		};
		res.on('end', () => {
			let chunks = res._getChunks();
			resolve(chunks);
		});
	});
}