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{"version":3,"file":"testUtils.js","sources":["../src/index.js"],"sourcesContent":["import { options } from 'preact';\n\n/**\n * Setup a rerender function that will drain the queue of pending renders\n * @returns {() => void}\n */\nexport function setupRerender() {\n\toptions.__test__previousDebounce = options.debounceRendering;\n\toptions.debounceRendering = cb => (options.__test__drainQueue = cb);\n\treturn () => options.__test__drainQueue && options.__test__drainQueue();\n}\n\nconst isThenable = value => value != null && typeof value.then == 'function';\n\n/** Depth of nested calls to `act`. */\nlet actDepth = 0;\n\n/**\n * Run a test function, and flush all effects and rerenders after invoking it.\n *\n * Returns a Promise which resolves \"immediately\" if the callback is\n * synchronous or when the callback's result resolves if it is asynchronous.\n *\n * @param {() => void|Promise<void>} cb The function under test. This may be sync or async.\n * @return {Promise<void>}\n */\nexport function act(cb) {\n\tif (++actDepth > 1) {\n\t\t// If calls to `act` are nested, a flush happens only when the\n\t\t// outermost call returns. In the inner call, we just execute the\n\t\t// callback and return since the infrastructure for flushing has already\n\t\t// been set up.\n\t\t//\n\t\t// If an exception occurs, the outermost `act` will handle cleanup.\n\t\ttry {\n\t\t\tconst result = cb();\n\t\t\tif (isThenable(result)) {\n\t\t\t\treturn result.then(\n\t\t\t\t\t() => {\n\t\t\t\t\t\t--actDepth;\n\t\t\t\t\t},\n\t\t\t\t\te => {\n\t\t\t\t\t\t--actDepth;\n\t\t\t\t\t\tthrow e;\n\t\t\t\t\t}\n\t\t\t\t);\n\t\t\t}\n\t\t} catch (e) {\n\t\t\t--actDepth;\n\t\t\tthrow e;\n\t\t}\n\t\t--actDepth;\n\t\treturn Promise.resolve();\n\t}\n\n\tconst previousRequestAnimationFrame = options.requestAnimationFrame;\n\tconst rerender = setupRerender();\n\n\t/** @type {() => void} */\n\tlet flush, toFlush;\n\n\t// Override requestAnimationFrame so we can flush pending hooks.\n\toptions.requestAnimationFrame = fc => (flush = fc);\n\n\tconst finish = () => {\n\t\ttry {\n\t\t\trerender();\n\t\t\twhile (flush) {\n\t\t\t\ttoFlush = flush;\n\t\t\t\tflush = null;\n\n\t\t\t\ttoFlush();\n\t\t\t\trerender();\n\t\t\t}\n\t\t} catch (e) {\n\t\t\tif (!err) {\n\t\t\t\terr = e;\n\t\t\t}\n\t\t} finally {\n\t\t\tteardown();\n\t\t}\n\n\t\toptions.requestAnimationFrame = previousRequestAnimationFrame;\n\t\t--actDepth;\n\t};\n\n\tlet err;\n\tlet result;\n\n\ttry {\n\t\tresult = cb();\n\t} catch (e) {\n\t\terr = e;\n\t}\n\n\tif (isThenable(result)) {\n\t\treturn result.then(finish, err => {\n\t\t\tfinish();\n\t\t\tthrow err;\n\t\t});\n\t}\n\n\t// nb. If the callback is synchronous, effects must be flushed before\n\t// `act` returns, so that the caller does not have to await the result,\n\t// even though React recommends this.\n\tfinish();\n\tif (err) {\n\t\tthrow err;\n\t}\n\treturn Promise.resolve();\n}\n\n/**\n * Teardown test environment and reset preact's internal state\n */\nexport function teardown() {\n\tif (options.__test__drainQueue) {\n\t\t// Flush any pending updates leftover by test\n\t\toptions.__test__drainQueue();\n\t\tdelete options.__test__drainQueue;\n\t}\n\n\tif (typeof options.__test__previousDebounce != 'undefined') {\n\t\toptions.debounceRendering = options.__test__previousDebounce;\n\t\tdelete options.__test__previousDebounce;\n\t} else {\n\t\toptions.debounceRendering = undefined;\n\t}\n}\n"],"names":["setupRerender","options","__test__previousDebounce","debounceRendering","cb","__test__drainQueue","isThenable","value","then","actDepth","teardown","undefined","result","e","Promise","resolve","flush","toFlush","previousRequestAnimationFrame","requestAnimationFrame","rerender","fc","err","finish"],"mappings":"wBAMgB,SAAAA,IAGf,OAFAC,EAAOA,QAACC,EAA2BD,EAAAA,QAAQE,kBAC3CF,EAAOA,QAACE,kBAAoB,SAAAC,UAAOH,EAAAA,QAAQI,EAAqBD,CAAE,EACrD,WAAA,OAAAH,EAAAA,QAAQI,GAAsBJ,UAAQI,GAAoB,CACxE,CAEA,IAAMC,EAAa,SAAAC,GAAS,OAAS,MAATA,GAAsC,mBAAdA,EAAMC,IAAkB,EAGxEC,EAAW,EAoGR,SAASC,IACXT,EAAOA,QAACI,IAEXJ,EAAOA,QAACI,WACDJ,EAAOA,QAACI,QAG+B,IAApCJ,EAAAA,QAAQC,GAClBD,EAAOA,QA
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