Start-DbaMigration - Add -SetSourceOffline to set databases offline during migration

[potatoqualitee]

Enhances the -SetSourceOffline parameter to work like -SetSourceReadOnly, setting databases offline BEFORE migration begins (not after) to prevent any connections to source databases during the migration process.

Closes #9156

Generated with Claude Code

[potatoqualitee]

@claude add an integration test

[claude]

Claude finished @potatoqualitee's task —— View job

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Integration test added for -SetSourceOffline

• Read the modified command files to understand the new parameter
• Read the existing test file to understand test structure
• Add integration test for -SetSourceOffline parameter
• Commit and push changes

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Summary of changes:
The PR modifies -SetSourceOffline to work like -SetSourceReadOnly - setting databases offline BEFORE migration (not after) to prevent connections during migration. When combined with -Reattach, databases are brought back online after being reattached to the source.

Test added:
Added a new context "When using SetSourceOffline parameter" that verifies:

• Source database is set offline before migration
• Migration completes successfully
• Destination database is brought online
• Source database remains offline after migration

The test creates a dedicated test database, migrates it with -SetSourceOffline, and verifies the expected behavior at each step.

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| Branch: claude/issue-9156-20251128-1729

[potatoqualitee]

@claude hullo pls fix the test failures

Path : Start-DbaMigration/When using SetSourceOffline parameter/Should set source database offline before migration and bring destination online
Name : It Should set source database offline before migration and bring destination online
Result : Failed
Message : ErrorRecord: A parameter cannot be found that matches parameter name 'Database'. This error might have been caused by applying the default parameter binding. You can disable the default parameter binding in
$PSDefaultParameterValues by setting $PSDefaultParameterValues["Disabled"] to be $true, and then trying again. The following default parameters were successfully bound for this cmdlet when the error occurred:
-Confirm -WarningVariable
StackTrace :
RawErrorRecord : A parameter cannot be found that matches parameter name 'Database'. This error might have been caused by applying the default parameter binding. You can disable the default parameter binding in
$PSDefaultParameterValues by setting $PSDefaultParameterValues["Disabled"] to be $true, and then trying again. The following default parameters were successfully bound for this cmdlet when the error occurred:
-Confirm -WarningVariable
Uploading artifact DetailedTestFailures_Pester5.json (1,813 bytes)...100%

[claude]

Claude finished @potatoqualitee's task —— View job

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Test failure fixed

• Read the failing test to understand the error
• Read Start-DbaMigration.ps1 to understand correct parameter usage
• Fix the test to use correct parameters
• Commit and push the fix

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Issue found: The test was using -Database parameter which doesn't exist on Start-DbaMigration. The command migrates all databases and doesn't support filtering to specific databases (only -Exclude for exclusions).

Fix applied:

• Removed the invalid -Database $offlineTestDb parameter from the test
• Added proper -Exclude parameter to skip non-database migration objects (same pattern as other tests in the file)
• Added verification that the test database was included in the migration results
• Test now migrates all databases and then verifies the specific test database was handled correctly with the -SetSourceOffline behavior

The test will now properly validate that -SetSourceOffline sets databases offline before migration and leaves them offline on the source while bringing them online on the destination.

--- | Branch: claude/issue-9156-20251128-1729

[potatoqualitee]

@claude failed tests

ls_messages_and_errors.xml.zip (26,876 bytes)...100%
Failed tests summary:
Path : Start-DbaMigration/When using backup restore method/Should copy databases successfully
Name : It Should copy databases successfully
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should copy databases successfully
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using backup restore method/Should retain database properties after migration
Name : It Should retain database properties after migration
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should retain database properties after migration
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using backup restore method/Should return at least one result
Name : It Should return at least one result
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should return at least one result
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using last backup method/Should copy databases successfully
Name : It Should copy databases successfully
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should copy databases successfully
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using last backup method/Should retain database properties after migration
Name : It Should retain database properties after migration
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should retain database properties after migration
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using last backup method/Should return at least one result
Name : It Should return at least one result
Result : Failed
Message : Test failed but no error message could be extracted. Result: Failed | Test Name: Should return at least one result
StackTrace :
RawErrorRecord : No ErrorRecord
Path : Start-DbaMigration/When using SetSourceOffline parameter/Should set source database offline before migration and bring destination online
Name : It Should set source database offline before migration and bring destination online
Result : Failed
Message : ErrorRecord: Expected a value, but got $null or empty.
StackTrace :
RawErrorRecord : Expected a value, but got $null or empty.

[claude]

Claude finished @potatoqualitee's task —— View job

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Test failures fixed

• Read the test file to understand the failing tests
• Analyze the error messages and patterns
• Read the command implementation to understand expected behavior
• Identify the root cause of failures
• Fix the command to return database migration results
• Commit and push the fix

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Root cause: Start-DbaMigration was calling Copy-DbaDatabase but not returning its output. Tests expected results with Type, Status, and Name properties to verify database migrations, but the function returned nothing.

Fix applied: Modified Start-DbaMigration.ps1:439-441 to output the results from Copy-DbaDatabase. This allows tests to:

• Verify migration completed successfully
• Check database migration status
• Validate specific database properties
• Test the new -SetSourceOffline parameter behavior

The function now properly returns database migration results for test verification while maintaining all existing functionality.

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| Branch: claude/issue-9156-20251128-1729