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import isPlainObject from 'lodash.isplainobject'
const DEFAULT_STRATEGY = 'css selector'
const DIRECT_SELECTOR_REGEXP = /^(id|css selector|xpath|link text|partial link text|name|tag name|class name|-android uiautomator|-android datamatcher|-ios uiautomation|-ios predicate string|-ios class chain|accessibility id):(.+)/
const XPATH_SELECTORS_START = [
'/', '(', '../', './', '*/'
]
const NAME_MOBILE_SELECTORS_START = [
'uia', 'xcuielementtype', 'android.widget', 'cyi'
]
const XPATH_SELECTOR_REGEXP = [
// HTML tag
/^([a-z0-9|-]*)/,
// optional . or # + class or id
/(?:(\.|#)(-?[_a-zA-Z]+[_a-zA-Z0-9-]*))?/,
// optional [attribute-name="attribute-selector"]
/(?:\[(-?[_a-zA-Z]+[_a-zA-Z0-9-]*)(?:=(?:"|')([a-zA-z0-9\-_. ]+)(?:"|'))?\])?/,
// *=query or =query
/(\*)?=(.+)$/,
]
const defineStrategy = function (selector) {
// Condition with checking isPlainObject(selector) should be first because
// in case of "selector" argument is a plain object then .match() will cause
// an error like "selector.match is not a function"
// Use '-android datamatcher' strategy if selector is a plain object (Android only)
if (isPlainObject(selector)) {
return '-android datamatcher'
}
// Check if user has specified locator strategy directly
if (selector.match(DIRECT_SELECTOR_REGEXP)) {
return 'directly'
}
// Use xPath strategy if selector starts with //
if (XPATH_SELECTORS_START.some(option => selector.startsWith(option))) {
return 'xpath'
}
// Use link text strategy if selector starts with =
if (selector.startsWith('=')) {
return 'link text'
}
// Use partial link text strategy if selector starts with *=
if (selector.startsWith('*=')) {
return 'partial link text'
}
// Use id strategy if the selector starts with id=
if (selector.startsWith('id=')) {
return 'id'
}
// Recursive element search using the UiAutomator library (Android only)
if (selector.startsWith('android=')) {
return '-android uiautomator'
}
// Recursive element search using the UIAutomation library (iOS-only)
if (selector.startsWith('ios=')) {
return '-ios uiautomation'
}
// Recursive element search using accessibility id
if (selector.startsWith('~')) {
return 'accessibility id'
}
// Class name mobile selector
// for iOS = UIA...
// for Android = android.widget
if (NAME_MOBILE_SELECTORS_START.some(option => selector.toLowerCase().startsWith(option))) {
return 'class name'
}
// Use tag name strategy if selector contains a tag
// e.g. "<div>" or "<div />"
if (selector.search(/<[a-zA-Z-]+( \/)*>/g) >= 0) {
return 'tag name'
}
// Use name strategy if selector queries elements with name attributes for JSONWP
// or if isMobile is used even when w3c is used
// e.g. "[name='myName']" or '[name="myName"]'
if (selector.search(/^\[name=("|')([a-zA-z0-9\-_.@=[\] ']+)("|')]$/) >= 0) {
return 'name'
}
// Allow to move up to the parent or select current element
if (selector === '..' || selector === '.') {
return 'xpath'
}
// Any element with given class, id, or attribute and content
// e.g. h1.header=Welcome or [data-name=table-row]=Item or #content*=Intro
if (selector.match(new RegExp(XPATH_SELECTOR_REGEXP.map(rx => rx.source).join('')))) {
return 'xpath extended'
}
}
export const findStrategy = function (selector, isW3C, isMobile) {
let using = DEFAULT_STRATEGY
let value = selector
switch (defineStrategy(selector)) {
// user has specified locator strategy directly
case 'directly': {
const match = selector.match(DIRECT_SELECTOR_REGEXP)
if (!isMobile && isW3C && !W3C_SELECTOR_STRATEGIES.includes(match[1])) {
throw new Error('InvalidSelectorStrategy') // ToDo: move error to wdio-error package
}
using = match[1]
value = match[2]
break
}
case 'xpath': {
using = 'xpath'
break
}
case 'id': {
using = 'id'
value = selector.slice(3)
break
}
case 'link text': {
using = 'link text'
value = selector.slice(1)
break
}
case 'partial link text': {
using = 'partial link text'
value = selector.slice(2)
break
}
case '-android uiautomator': {
using = '-android uiautomator'
value = selector.slice(8)
break
}
case '-android datamatcher': {
using = '-android datamatcher'
value = JSON.stringify(value)
break
}
case '-ios uiautomation': {
using = '-ios uiautomation'
value = selector.slice(4)
break
}
case 'accessibility id': {
using = 'accessibility id'
value = selector.slice(1)
break
}
case 'class name': {
using = 'class name'
break
}
case 'tag name': {
using = 'tag name'
value = selector.replace(/<|>|\/|\s/g, '')
break
}
case 'name': {
if (isMobile || !isW3C) {
using = 'name'
value = selector.match(/^\[name=("|')([a-zA-z0-9\-_.@=[\] ']+)("|')]$/)[2]
}
break
}
case 'xpath extended': {
using = 'xpath'
const match = selector.match(new RegExp(XPATH_SELECTOR_REGEXP.map(rx => rx.source).join('')))
const PREFIX_NAME = { '.': 'class', '#': 'id' }
const conditions = []
const [
tag,
prefix, name,
attrName, attrValue,
partial, query
] = match.slice(1)
if (prefix) {
conditions.push(`contains(@${PREFIX_NAME[prefix]}, "${name}")`)
}
if (attrName) {
conditions.push(
attrValue
? `contains(@${attrName}, "${attrValue}")`
: `@${attrName}`
)
}
conditions.push(
partial ? `contains(., "${query}")` : `normalize-space() = "${query}"`
)
value = `.//${tag || '*'}[${conditions.join(' and ')}]`
break
}
}
/**
* ensure selector strategy is supported
*/
if (!isMobile && isW3C && !W3C_SELECTOR_STRATEGIES.includes(using)) {
throw new Error('InvalidSelectorStrategy') // ToDo: move error to wdio-error package
}
return { using, value }
}
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