add a tips for building module

README.md

@@ -148,7 +148,7 @@ Differences noted here
 |`calendarAccessAuthorized`|Set this to `true` if you want to enable calendar access on IOS Simulator with given bundleId. Set to `false`, if you want to disable calendar access on IOS Simulator with given bundleId. If not set, the calendar authorization status will not be set.|e.g., `true`|
 |`isHeadless`|Set this capability to `true` if automated tests are running on Simulator and the device display is not needed to be visible. This only has an effect since Xcode9 and only for simulators. All running instances of Simulator UI are going to be automatically terminated if headless test is started. `false` is the default value.|e.g., `true`|
 |`webkitDebugProxyPort`|Local port number used for communication with ios-webkit-debug-proxy. Only relevant for real devices. The default value equals to `27753`.|e.g. `20000`|
-|`useXctestrunFile`|Use Xctestrun file to launch WDA. It will search for such file in `bootstrapPath`. Expected name of file is `WebDriverAgentRunner_iphoneos<sdkVersion>-arm64.xctestrun` for real device and `WebDriverAgentRunner_iphonesimulator<sdkVersion>-x86_64.xctestrun` for simulator. One can do `build-for-testing` for `WebDriverAgent` project for simulator and real device and then you will see [Product Folder like this](docs/useXctestrunFile.png) and you need to copy content of this folder at `bootstrapPath` location. Since, this capability expects that you have already built `WDA` project, it neither check whether you have necessary dependencies to build `WDA` nor it try to build project. Defaults to `false`|e.g., `true`|
+|`useXctestrunFile`|Use Xctestrun file to launch WDA. It will search for such file in `bootstrapPath`. Expected name of file is `WebDriverAgentRunner_iphoneos<sdkVersion>-arm64.xctestrun` for real device and `WebDriverAgentRunner_iphonesimulator<sdkVersion>-x86_64.xctestrun` for simulator. One can do `build-for-testing` for `WebDriverAgent` project for simulator and real device and then you will see [Product Folder like this](docs/useXctestrunFile.png) and you need to copy content of this folder at `bootstrapPath` location. Since this capability expects that you have already built `WDA` project, it neither checks whether you have necessary dependencies to build `WDA` nor will it try to build project. Defaults to `false`. _Tips: `Xcodebuild` builds for the target platform version. We'd recommend you to build with minimal OS version which you'd like to run as the original WDA module. e.g. If you build WDA for 12.2, the module cannot run on iOS 11.4 because of loading some module error on simulator. A module built with 11.4 can work on iOS 12.2. (This is xcodebuild's expected behaviour.)_ |e.g., `true`|
 |`absoluteWebLocations`|This capability will direct the `Get Element Location` command, when used within webviews, to return coordinates which are relative to the origin of the page, rather than relative to the current scroll offset. This capability has no effect outside of webviews. Default `false`.|e.g., `true`|
 |`simulatorWindowCenter`|Allows to explicitly set the coordinates of Simulator window center for Xcode9+ SDK. This capability only has an effect if Simulator window has not been opened yet for the current session before it started.|e.g. `{-100.0,100.0}` or `{500,500}`, spaces are not allowed|
 |`useJSONSource`|Get JSON source from WDA and parse into XML on Appium server. This can be much faster, especially on large devices. Defaults to `false`.|e.g., `true`|