Checksum.Tests.ps1
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. $PSScriptRoot\Checksum.ps1 Describe 'Checksum Unit Tests' -Tag 'Unit' { Context 'Checksum file path generation' { It 'Should create checksum.md5 file is Algorithm is MD5' { $Path = Get-ChecksumFilePath '.' 'MD5' $Path | Should -Match 'checksum\.md5$' } It 'Should create checksum.sha1 file if Algorithm is SHA1' { $Path = Get-ChecksumFilePath '.' 'SHA1' $Path | Should -Match 'checksum\.sha1$' } It 'Should create checksum.sha256 file if Algorithm is SHA256' { $Path = Get-ChecksumFilePath '.' 'SHA256' $Path | Should -Match 'checksum\.sha256$' } It 'Should create checksum.sha1 file if Algorithm is SHA512' { $Path = Get-ChecksumFilePath '.' 'SHA512' $Path | Should -Match 'checksum\.sha512$' } It 'Should join the Folder with a metadata folder' { $Path = Get-ChecksumFilePath 'folder' 'MD5' $Path | Should -Match '^folder\\metadata\\.+$' } It 'Should have path containing the folder, a metadata folder, and a checksum file' { $Path = Get-ChecksumFilePath '.' 'MD5' $Path | Should -BeExactly '.\metadata\checksum.md5' } It 'Should return path correctly if folder is parent of the current one' { $Path = Get-ChecksumFilePath '..' 'MD5' $Path | Should -BeExactly '..\metadata\checksum.md5' } It 'Should return path correctly if folder is grandparent of the current one' { $Path = Get-ChecksumFilePath '..\..\' 'MD5' $Path | Should -BeExactly '..\..\metadata\checksum.md5' } It 'Should change Unix-like "/" path separators to Windows "\" separators' { $Path = Get-ChecksumFilePath './folder1/folder2/' 'MD5' $Path | Should -BeExactly '.\folder1\folder2\metadata\checksum.md5' } } Context 'Checksum calculation' { Mock Get-FileHash { return [PSCustomObject]@{ Hash='MD5MD5' } } -ParameterFilter { $Algorithm -eq 'MD5' } Mock Get-FileHash { return [PSCustomObject]@{ Hash='SHA1SHA1' } } -ParameterFilter { $Algorithm -eq 'SHA1' } Mock Get-FileHash { return [PSCustomObject]@{ Hash='SHA256SHA256' } } -ParameterFilter { $Algorithm -eq 'SHA256' } Mock Get-FileHash { return [PSCustomObject]@{ Hash='SHA512SHA512' } } -ParameterFilter { $Algorithm -eq 'SHA512' } Mock Resolve-Path { return [PSCustomObject]@{ Path='C:\folder' } } -ParameterFilter { $Path -eq 'folder' } Mock Resolve-Path { return [PSCustomObject]@{ Path="C:\folder\$Path" } } -ParameterFilter { $Path -ne 'folder' } It 'Should return lowercase MD5 checksum if Algorithm is MD5' { $Checksum = Get-ChecksumsForFiles 'folder' 'testfile' 'MD5' $Checksum | Should -Match '^md5md5.+$' } It 'Should return lowercase SHA1 hash if Algorithm is SHA1' { $Checksum = Get-ChecksumsForFiles 'folder' 'test' 'SHA1' $Checksum | Should -Match '^sha1sha1.+$' } It 'Should return lowercase SHA256 hash if Algorithm is SHA256' { $Checksum = Get-ChecksumsForFiles 'folder' 'test' 'SHA256' $Checksum | Should -Match '^sha256sha256.+$' } It 'Should return lowercase SHA512 hash if Algorithm is SHA512' { $Checksum = Get-ChecksumsForFiles 'folder' 'test' 'SHA512' $Checksum | Should -Match '^sha512sha512.+$' } It 'Should return checksum and filename separated by two spaces' { $Checksum = Get-ChecksumsForFiles 'folder' @(,'testfile') 'MD5' $Checksum | Should -BeExactly 'md5md5 testfile' } It 'Should not escape spaces in filenames' { $Checksum = Get-ChecksumsForFiles 'folder' @('this is a test.txt') 'MD5' $Checksum | Should -BeExactly 'md5md5 this is a test.txt' } It 'Should calculate checksums for multiple files' { $Checksums = Get-ChecksumsForFiles 'folder' @('file1', 'file2', 'file3', 'file4') 'SHA1' $Checksums | Should -HaveCount 4 $Checksums[0] | Should -BeExactly 'sha1sha1 file1' $Checksums[1] | Should -BeExactly 'sha1sha1 file2' $Checksums[2] | Should -BeExactly 'sha1sha1 file3' $Checksums[3] | Should -BeExactly 'sha1sha1 file4' } It 'Should return Unix-like "/" path separators for files in subdirectories' { $Checksums = Get-ChecksumsForFiles 'folder' @('TestFolder\File_1.txt', 'TestFolder\FooFolder\File_2.txt') 'SHA256' $Checksums | Should -HaveCount 2 $Checksums[0] | Should -BeExactly 'sha256sha256 TestFolder/File_1.txt' $Checksums[1] | Should -BeExactly 'sha256sha256 TestFolder/FooFolder/File_2.txt' } It 'Should not have multiple "\" path separators if folder resolves with trailing "\"' { Mock Resolve-Path { return [PSCustomObject]@{ Path='C:\folder\' } } -ParameterFilter { $Path -eq 'folder' } $Checksums = Get-ChecksumsForFiles 'folder' @('file1.txt', 'TestFolder\file2.txt') 'SHA512' $Checksums | Should -HaveCount 2 $Checksums[0] | Should -BeExactly 'sha512sha512 file1.txt' $Checksums[1] | Should -BeExactly 'sha512sha512 TestFolder/file2.txt' } } } Describe 'Checksum Integration Tests' -Tag 'Integration' { $File1 = Join-Path -Path $TestDrive -ChildPath 'file_1.txt' $File2 = Join-Path -Path $TestDrive -ChildPath 'file 2.txt' $File3 = Join-Path -Path $TestDrive -ChildPath 'folder\file 3.txt' New-Item -Path $File1 -ItemType File -Value 'test test test' -Force | Out-Null New-Item -Path $File2 -ItemType File -Value 'testing testing testing' -Force | Out-Null New-Item -Path $File3 -ItemType File -Value 't t t' -Force | Out-Null Context 'Checksum calculation' { It 'Should calculate the correct MD5 checksums for each file' { $Checksums = Get-ChecksumsForFiles -Folder $TestDrive -FilesToChecksum @($File1, $File2, $File3) -Algorithm MD5 $JoinedChecksums = $Checksums -Join "`n" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File1 -Algorithm MD5).Hash.ToLower()) file_1.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File2 -Algorithm MD5).Hash.ToLower()) file 2.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File3 -Algorithm MD5).Hash.ToLower()) folder/file 3.txt" } It 'Should calculate the correct SHA1 checksums for each file' { $Checksums = Get-ChecksumsForFiles -Folder $TestDrive -FilesToChecksum @($File1, $File2, $File3) -Algorithm SHA1 $JoinedChecksums = $Checksums -Join "`n" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File1 -Algorithm SHA1).Hash.ToLower()) file_1.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File2 -Algorithm SHA1).Hash.ToLower()) file 2.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File3 -Algorithm SHA1).Hash.ToLower()) folder/file 3.txt" } It 'Should calculate the correct SHA256 checksums for each file' { $Checksums = Get-ChecksumsForFiles -Folder $TestDrive -FilesToChecksum @($File1, $File2, $File3) -Algorithm SHA256 $JoinedChecksums = $Checksums -Join "`n" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File1 -Algorithm SHA256).Hash.ToLower()) file_1.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File2 -Algorithm SHA256).Hash.ToLower()) file 2.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File3 -Algorithm SHA256).Hash.ToLower()) folder/file 3.txt" } It 'Should calculate the correct SHA512 checksums for each file' { $Checksums = Get-ChecksumsForFiles -Folder $TestDrive -FilesToChecksum @($File1, $File2, $File3) -Algorithm SHA512 $JoinedChecksums = $Checksums -Join "`n" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File1 -Algorithm SHA512).Hash.ToLower()) file_1.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File2 -Algorithm SHA512).Hash.ToLower()) file 2.txt" $JoinedChecksums | Should -Match "$((Get-FileHash -Path $File3 -Algorithm SHA512).Hash.ToLower()) folder/file 3.txt" } } } |