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@onflow/flow-js-testing

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This package will expose a set of utility methods, to allow Cadence code testing with libraries like Jest

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<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/jest-asserts.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../prettify.css" /> <link rel="stylesheet" href="../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../index.html">All files</a> / <a href="index.html">src</a> jest-asserts.js</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> <span class="strong">86.88% </span> <span class="quiet">Statements</span> <span class='fraction'>53/61</span> </div> <div class='fl pad1y space-right2'> <span class="strong">58.33% </span> <span class="quiet">Branches</span> <span class='fraction'>7/12</span> </div> <div class='fl pad1y space-right2'> <span class="strong">100% </span> <span class="quiet">Functions</span> <span class='fraction'>8/8</span> </div> <div class='fl pad1y space-right2'> <span class="strong">86.88% </span> <span class="quiet">Lines</span> <span class='fraction'>53/61</span> </div> </div> <p class="quiet"> Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block. </p> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a 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cline-yes">1x</span> <span class="cline-any cline-neutral">&nbsp;</span> <span class="cline-any cline-neutral">&nbsp;</span> <span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/* * Flow JS Testing * * Copyright 2020-2021 Dapper Labs, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ &nbsp; import {getPaths, getStorageValue} from "./storage" import {getValueByKey, parsePath} from "./utils" &nbsp; const {expect} = global &nbsp; /** * Return Promise from passed interaction * @param {function | Promise} ix - Promise or function to wrap * @returns Promise&lt;*&gt; * */ export const promise = async ix =&gt; { if (typeof ix === "function") { return await ix() } return await ix } &nbsp; /** * Ensure transaction did not throw and sealed. * @param {function | Promise} ix - Promise or function to wrap * @returns Promise&lt;*&gt; - transaction result * */ export const shallPass = async ix =&gt; { const wrappedInteraction = promise(ix) &nbsp; const response = await wrappedInteraction const [result, error] = response &nbsp; <span class="missing-if-branch" title="if path not taken" >I</span>if (error) { <span class="cstat-no" title="statement not covered" > throw error</span> } &nbsp; let resolvedStatus let resolvedErrorMessage <span class="missing-if-branch" title="if path not taken" >I</span>if (Array.isArray(result)) { const {status, errorMessage} = <span class="cstat-no" title="statement not covered" >result</span> <span class="cstat-no" title="statement not covered" > resolvedStatus = status</span> <span class="cstat-no" title="statement not covered" > resolvedErrorMessage = errorMessage</span> } else { const {status, errorMessage} = result resolvedStatus = status resolvedErrorMessage = errorMessage } &nbsp; await expect(resolvedStatus).toBe(4) await expect(resolvedErrorMessage).toBe("") &nbsp; return response } &nbsp; /** * Ensure interaction did not throw and return result of it * @param {function | Promise} ix - Promise or function to wrap * @returns Promise&lt;*&gt; - result of interaction * */ export const shallResolve = async ix =&gt; { const wrappedInteraction = promise(ix) const response = await wrappedInteraction const [, error] = response expect(error).toBe(null) &nbsp; return response } &nbsp; /** * Ensure interaction throws an error. * @param {function | Promise} ix - Promise or function to wrap * @param {string | RegExp} [message] - Expected error message provided as either a string equality or regular expression * @returns Promise&lt;*&gt; - result of interaction * */ export const shallRevert = async (ix, message) =&gt; { const wrappedInteraction = promise(ix) const response = await wrappedInteraction const [result, error] = response &nbsp; await expect(result).toBe(null) &nbsp; <span class="missing-if-branch" title="if path not taken" >I</span>if (message) { const errorMessage = <span class="cstat-no" title="statement not covered" >error</span> .toString() .match(/^error: (panic)|(assertion failed): ([^\r\n]*)$/m) ?.at(3) <span class="cstat-no" title="statement not covered" > if (message instanceof RegExp) {</span> <span class="cstat-no" title="statement not covered" > await expect(errorMessage).toMatch(message)</span> } else { <span class="cstat-no" title="statement not covered" > await expect(errorMessage).toBe(message)</span> } } else { await expect(error).not.toBe(null) } &nbsp; return response } &nbsp; /** * Ensure interaction throws an error. * @param {function | Promise} ix - Promise or function to wrap * @returns Promise&lt;*&gt; - result of interaction * */ export const shallThrow = async ix =&gt; { const wrappedInteraction = promise(ix) const response = await wrappedInteraction &nbsp; const [result, error] = response await expect(result).toBe(null) await expect(error).not.toBe(null) &nbsp; return response } &nbsp; /** * Asserts that the given account has the given path enabled. * * @async * @param {string} account - The address or name of the account to check for the path. * @param {string} path - The path to check for. * @returns {Promise&lt;void&gt;} A Promise that resolves when the assertion is complete, or rejects with an error if the assertion fails. */ export const shallHavePath = async (account, path) =&gt; { let parsedPath expect(() =&gt; { parsedPath = parsePath(path) }).not.toThrowError() &nbsp; const {domain, slot} = parsedPath const paths = await getPaths(account) const key = `${domain}Paths` const hasPathEnabled = paths[key].has(slot) &nbsp; await expect(hasPathEnabled).toBe(true) } &nbsp; /** * Asserts that the given account has the expected storage value at the given path. * * @async * @param {string} account - The address or name of the account to check for the storage value. * @param {{pathName: string, key?: string, expect: any}} params - An object containing the path name, optional key, and expected value. * @returns {Promise&lt;void&gt;} A Promise that resolves when the assertion is complete, or rejects with an error if the assertion fails. */ export const shallHaveStorageValue = async (account, params) =&gt; { const {pathName, key} = params &nbsp; const storageValue = await getStorageValue(account, pathName) &nbsp; if (key) { const actualValue = getValueByKey(key, storageValue) expect(actualValue).toBe(params.expect) } else { expect(storageValue).toBe(params.expect) } } &nbsp;</pre></td></tr></table></pre> <div class='push'></div><!-- for sticky footer --> </div><!-- /wrapper --> <div 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