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stringifyExtension.ts
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stringifyExtension.ts
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import {
ChangeStep,
ClickStep,
DoubleClickStep,
EmulateNetworkConditionsStep,
HoverStep,
KeyDownStep,
KeyUpStep,
LineWriter,
NavigateStep,
PuppeteerStringifyExtension,
ScrollStep,
Selector,
SetViewportStep,
Step,
UserFlow,
WaitForElementStep,
WaitForExpressionStep,
StepType
} from '@puppeteer/replay'
import { formatAsJSLiteral, findByCondition } from './utils.js'
import { SUPPORTED_KEYS, KEY_NOT_SUPPORTED_ERROR } from './constants.js'
const ARIA_PREFIX = 'aria/'
const XPATH_PREFIX = 'xpath/'
const DEFAULT_TARGET = 'main'
export class StringifyExtension extends PuppeteerStringifyExtension {
#target = DEFAULT_TARGET
async beforeAllSteps(out: LineWriter, flow: UserFlow): Promise<void> {
out
.appendLine(`describe(${formatAsJSLiteral(flow.title)}, () => {`)
.startBlock()
out
.appendLine(`it(${formatAsJSLiteral(`tests ${flow.title}`)}, async () => {`)
.startBlock()
}
async afterAllSteps(out: LineWriter): Promise<void> {
out.endBlock().appendLine('});')
out.endBlock().appendLine('});')
}
async stringifyStep(
out: LineWriter,
step: Step,
flow: UserFlow,
): Promise<void> {
this.#appendContext(out, step)
this.#appendStepType(out, step, flow)
this.#appendAssertedEvents(out, step)
}
#appendStepType(out: LineWriter, step: Step, flow: UserFlow): void {
switch (step.type) {
case StepType.SetViewport:
return this.#appendViewportStep(out, step)
case StepType.Navigate:
return this.#appendNavigateStep(out, step)
case StepType.Click:
return this.#appendClickStep(out, step, flow)
case StepType.Change:
return this.#appendChangeStep(out, step, flow)
case StepType.KeyDown:
return this.#appendKeyDownStep(out, step)
case StepType.KeyUp:
return this.#appendKeyUpStep(out, step)
case StepType.Scroll:
return this.#appendScrollStep(out, step, flow)
case StepType.DoubleClick:
return this.#appendDoubleClickStep(out, step, flow)
case StepType.EmulateNetworkConditions:
return this.#appendEmulateNetworkConditionsStep(out, step)
case StepType.Hover:
return this.#appendHoverStep(out, step, flow)
case StepType.WaitForElement:
return this.#appendWaitForElementStep(out, step, flow)
case StepType.WaitForExpression:
return this.#appendWaitExpressionStep(out, step)
default:
return this.logStepsNotImplemented(step)
}
}
#appendAssertedEvents(out: LineWriter, step: Step) {
if (!step.assertedEvents || step.assertedEvents.length === 0) {
return
}
for (const event of step.assertedEvents) {
switch (event.type) {
case 'navigation':
if (event.url) {
out.appendLine(`await expect(browser).toHaveUrl(${formatAsJSLiteral(event.url)})`)
}
}
}
}
#appendContext(out: LineWriter, step: Step) {
if (!step.target || step.target === this.#target) {
return
}
if (step.target === DEFAULT_TARGET) {
out.appendLine('await browser.switchToParentFrame()')
return
}
out.appendLine('await browser.switchToFrame(').startBlock()
out.appendLine( `await browser.$('iframe[src="${step.target}"]')`).endBlock()
out.appendLine(')')
}
#appendNavigateStep(out: LineWriter, step: NavigateStep): void {
out.appendLine(`await browser.url(${formatAsJSLiteral(step.url)})`)
}
#appendViewportStep(out: LineWriter, step: SetViewportStep): void {
out.appendLine(`await browser.setWindowSize(${step.width}, ${step.height})`)
}
#appendClickStep(out: LineWriter, step: ClickStep, flow: UserFlow): void {
const domSelector = this.getSelector(step.selectors, flow)
const hasRightButton = step.button && step.button === 'secondary'
if (domSelector) {
hasRightButton
? out.appendLine(`await browser.$(${domSelector}).click({ button: 'right' })`)
: out.appendLine(`await browser.$(${domSelector}).click()`)
return
}
console.log(`Warning: The click on ${step.selectors} was not able to export to WebdriverIO. Please adjust selectors and try again`)
}
#appendChangeStep(out: LineWriter, step: ChangeStep, flow: UserFlow): void {
const domSelector = this.getSelector(step.selectors, flow)
if (domSelector) {
out.appendLine(`await browser.$(${domSelector}).setValue(${formatAsJSLiteral(step.value)})`)
}
}
#appendKeyDownStep(out: LineWriter, step: KeyDownStep): void {
const pressedKey = step.key.toLowerCase() as keyof typeof SUPPORTED_KEYS
if (!SUPPORTED_KEYS[pressedKey]) {
return console.error(KEY_NOT_SUPPORTED_ERROR, pressedKey)
}
const keyValue = SUPPORTED_KEYS[pressedKey]
out.appendLine('await browser.performActions([{').startBlock()
out.appendLine( 'type: \'key\',')
out.appendLine( 'id: \'keyboard\',')
out.appendLine( `actions: [{ type: 'keyDown', value: '${keyValue}' }]`).endBlock()
out.appendLine('}])')
}
#appendKeyUpStep(out: LineWriter, step: KeyUpStep): void {
const pressedKey = step.key.toLowerCase() as keyof typeof SUPPORTED_KEYS
if (!SUPPORTED_KEYS[pressedKey]) {
return console.error(KEY_NOT_SUPPORTED_ERROR, pressedKey)
}
const keyValue = SUPPORTED_KEYS[pressedKey]
out.appendLine('await browser.performActions([{').startBlock()
out.appendLine( 'type: \'key\',')
out.appendLine( 'id: \'keyboard\',')
out.appendLine( `actions: [{ type: 'keyUp', value: '${keyValue}' }]`).endBlock()
out.appendLine('}])')
}
#appendScrollStep(out: LineWriter, step: ScrollStep, flow: UserFlow): void {
if ('selectors' in step) {
const domSelector = this.getSelector(step.selectors, flow)
out.appendLine(`await browser.$(${domSelector}).moveTo()`)
return
}
out.appendLine(`await browser.execute(() => window.scrollTo(${step.x}, ${step.y}))`)
}
#appendDoubleClickStep(
out: LineWriter,
step: DoubleClickStep,
flow: UserFlow,
): void {
const domSelector = this.getSelector(step.selectors, flow)
if (!domSelector) {
console.log(
`Warning: The click on ${step.selectors} was not able to be exported to WebdriverIO. Please adjust your selectors and try again.`,
)
return
}
out.appendLine(`await browser.$(${domSelector}).doubleClick()`)
}
#appendHoverStep(out: LineWriter, step: HoverStep, flow: UserFlow): void {
const domSelector = this.getSelector(step.selectors, flow)
if (!domSelector) {
console.log(
`Warning: The Hover on ${step.selectors} was not able to be exported to WebdriverIO. Please adjust your selectors and try again.`,
)
return
}
out.appendLine(`await browser.$(${domSelector}).moveTo()`)
}
#appendEmulateNetworkConditionsStep(
out: LineWriter,
step: EmulateNetworkConditionsStep,
): void {
out.appendLine('await browser.setNetworkConditions({').startBlock()
out.appendLine( 'offline: false,')
out.appendLine( `latency: ${step.latency},`)
out.appendLine( `download_throughput: ${step.download},`)
out.appendLine( `upload_throughput: ${step.upload}`).endBlock()
out.appendLine('})')
}
#appendWaitForElementStep(
out: LineWriter,
step: WaitForElementStep,
flow: UserFlow,
): void {
const domSelector = this.getSelector(step.selectors, flow)
if (!domSelector) {
console.log(
`Warning: The WaitForElement on ${step.selectors} was not able to be exported to WebdriverIO. Please adjust your selectors and try again.`,
)
}
const opts = step.timeout ? `, { timeout: ${step.timeout} }` : ''
switch (step.operator) {
case '<=':
out.appendLine(`await expect(browser.$$(${domSelector})).toBeElementsArrayOfSize({ lte: ${step.count} }${opts})`)
break
case '==':
out.appendLine(`await expect(browser.$$(${domSelector})).toBeElementsArrayOfSize(${step.count}${opts})`)
break
case '>=':
out.appendLine(`await expect(browser.$$(${domSelector})).toBeElementsArrayOfSize({ gte: ${step.count} }${opts})`)
break
}
}
#appendWaitExpressionStep(
out: LineWriter,
step: WaitForExpressionStep
): void {
out.appendLine('await browser.waitUntil(() => (').startBlock()
out.appendLine( `browser.execute(() => ${step.expression})`).endBlock()
out.appendLine('))')
}
getSelector(selectors: Selector[], flow: UserFlow): string | undefined {
/**
* find by id first as it is the safest selector
*/
const idSelector = findByCondition(
selectors,
(s) => s.startsWith('#') && !s.includes(' ') && !s.includes('.') && !s.includes('>') && !s.includes('[') && !s.includes('~') && !s.includes(':')
)
if (idSelector) return idSelector
/**
* Use WebdriverIOs aria selector as second option
* https://webdriver.io/docs/selectors#accessibility-name-selector
*/
const ariaSelector = findByCondition(
selectors,
(s) => s.startsWith(ARIA_PREFIX)
)
if (ariaSelector) return ariaSelector
// Remove Aria selectors
const nonAriaSelectors = this.filterArrayByString(selectors, ARIA_PREFIX)
/**
* use xPath selector if aria selector is not available
*/
const xPathSelector = findByCondition(
selectors,
(s) => s.startsWith(XPATH_PREFIX)
)
if (xPathSelector) return `"${xPathSelector.slice(XPATH_PREFIX.length + 1)}`
let preferredSelector
// Give preference to user selector
if (flow.selectorAttribute) {
preferredSelector = this.filterArrayByString(
nonAriaSelectors,
flow.selectorAttribute,
)
}
if (preferredSelector && preferredSelector[0]) {
return formatAsJSLiteral(
Array.isArray(preferredSelector[0])
? preferredSelector[0][0]
: preferredSelector[0],
)
}
return formatAsJSLiteral(
Array.isArray(nonAriaSelectors[0])
? nonAriaSelectors[0][0]
: nonAriaSelectors[0],
)
}
filterArrayByString(selectors: Selector[], filterValue: string): Selector[] {
return selectors.filter((selector) =>
filterValue === 'aria/'
? !selector[0].includes(filterValue)
: selector[0].includes(filterValue),
)
}
logStepsNotImplemented(step: Step): void {
console.log(
`Warning: WebdriverIO Chrome Recorder does not handle migration of types ${step.type}.`,
)
}
}