How to execute SQL Script using windows powershell(using invoke-sqlcmd or any if)

Question

OS : Windows server 2008
SQL Server : SQL Server 2012
Script: Test.sql (T-SQL)  example : "select name from sys.databases"
Batch script: windows  MyBatchscript.bat ( here connects to sql server using sqlcmd  and output c:\Testput.txt) 
 (sqlcmd.exe -S DBserverName -U username -P p@ssword -i C:\test.sql -o "c:\Testoutput.txt)  ---it working without any issues.....
This can execute if i double click MyBatchscript.bat file and can see the output in c:\testput.txt.
Powershell: Similarly, How can i do in powershell 2.0 or higher versions?  can any one give full details with each step?
I found some of them online, but nowhere seen clear details or examples and it not executing through cmd line (or batch script).
example: invoke-sqlcmd -Servernameinstance Servername -inputfile "c:\test.sql" | out-File -filepath "c:\psOutput.txt"  --(call this file name MyTest.ps1)
(The above script working if i run manually. I want to run automatic like double click (or schedule with 3rd party tool/scheduler ) in Batch file and see the output in C drive(c:\psOutput.txt))
Can anyone Powershell experts give/suggest full details/steps for this. How to proceed? Is there any configurations required to run automatic?
Thanks in advance.

Answer 1

Testeted the following code and it's working.....thanks all.
Execute sql script using invoke-sqlcmd with batch script and without batch script.
Option1: using Import sqlps
1.Save sql script as "C:\scripts\Test.sql"  script in side Test.sql: select name from sys.databases
2.Save Batch script as "C:\scripts\MyTest.bat" Script inside Batch script:
powershell.exe C:\scripts\mypowershell.ps1
3.Save powershell script as "C:\scripts\mypowershell.ps1"
import-module "sqlps" -DisableNameChecking
invoke-sqlcmd -Servername ServerName -inputFile "C:\scripts\Test.sql" | out-File -filepath "C:\scripts\TestOutput.txt"
4.Run the Batch script commandline or double click then can able to see the output "C:\scripts\TestOutput.txt" file.
5.Connect to current scripts location  cd C:\scripts (enter)
C:\scripts\dir (enter )
C:\scripts\MyTest.bat (enter)
Note: can able to see the output in "C:\scripts" location as file name "TestOutput.txt".
Option2: Otherway, import sqlps and execution
1.Save sql script as "C:\scripts\Test.sql"  script in side Test.sql: select name from sys.databases
2.Save powershell script as "C:\scripts\mypowershell.ps1"
# import-module "sqlps" -DisableNameChecking #...Here it not required.
invoke-sqlcmd -Servername ServerName -inputFile "C:\scripts\Test.sql" | out-File -filepath "C:\scripts\TestOutput.txt"
3.Connect to current scripts location
cd C:\scripts (enter)
C:\scripts\dir (enter )
C:\scripts\powershell.exe sqlps C:\scripts\mypowershell.ps1 (enter)
Note: can able to see the output in "C:\scripts" location as file name "TestOutput.txt".