Add unit tests for Set-GiteaConfiguration, Get-GiteaConfiguration, and Get-GiteaFileContent functions

PS-GiteaUtilities/Tests/Invoke-GiteaFileDownload.Tests.ps1

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+# Invoke-GiteaFileDownload.Tests.ps1
+
+# Import the module under test
+$modulePath = Join-Path -Path $PSScriptRoot -ChildPath '..\PS-GiteaUtilities.psm1'
+Import-Module -Name $modulePath -Force
+
+Describe 'Invoke-GiteaFileDownload' {
+
+    BeforeEach {
+        # Always mock Get-GiteaConfiguration to avoid needing real config
+        Mock -CommandName Get-GiteaConfiguration -ModuleName PS-GiteaUtilities -MockWith {
+            return @{ token = 'mocktoken' }
+        }
+
+        # Correct webClient Mock: headers, download, dispose
+        Mock -CommandName New-Object -ModuleName PS-GiteaUtilities -MockWith {
+            $headers = New-Object System.Net.WebHeaderCollection
+        
+            # Create a real object
+            $webClient = New-Object PSObject
+        
+            # Add Headers
+            Add-Member -InputObject $webClient -MemberType NoteProperty -Name Headers -Value $headers
+        
+            # Add a DownloadFile method
+            Add-Member -InputObject $webClient -MemberType ScriptMethod -Name DownloadFile -Value {
+                param($url, $path)
+                # Fake download (do nothing)
+            }
+        
+            # Add a Dispose method
+            Add-Member -InputObject $webClient -MemberType ScriptMethod -Name Dispose -Value {
+                # Fake dispose (do nothing)
+            }
+        
+            return $webClient
+        }
+        # Mock filesystem behavior
+        Mock -CommandName Test-Path -ModuleName PS-GiteaUtilities -MockWith { $false }
+        Mock -CommandName New-Item -ModuleName PS-GiteaUtilities -MockWith { }
+
+        # Clean captured download data before each test
+        $script:LastDownloadUrl = $null
+        $script:LastDownloadPath = $null
+    }
+
+    Context 'When all parameters are valid' {
+        It 'Should download a file successfully' {
+            $result = Invoke-GiteaFileDownload -downloadURL 'https://gitea.example.com/raw/path/to/file.txt' -token 'abc123'
+
+            $result | Should -Not -BeNullOrEmpty
+            $result.Success | Should -Be $true
+            $result.Path | Should -Match 'file\.txt$'
+        }
+    }
+
+    Context 'When preserving relative paths' {
+        It 'Should create a path based on filePath with PreserveRelativePath' {
+            $result = Invoke-GiteaFileDownload -downloadURL 'https://gitea.example.com/raw/path/to/file.txt' `
+                -filePath 'docs/manual/file.txt' -PreserveRelativePath -token 'abc123'
+
+            $result.Path | Should -Match 'docs[\\/]+manual[\\/]+file\.txt$'
+            $result.Success | Should -Be $true
+        }
+    }
+
+    Context 'When skipping directories' {
+        It 'Should skip items with type = dir' {
+            $result = Invoke-GiteaFileDownload -filePath 'docs/' -type 'dir' -token 'abc123'
+
+            $result.Success | Should -Be $true
+            $result.Error | Should -Match 'Skipped'
+        }
+    }
+
+    Context 'When file exists and -Force is not used' {
+        BeforeEach {
+            # Simulate file already exists
+            Mock -CommandName Test-Path -ModuleName PS-GiteaUtilities -MockWith {
+                param($Path, $PathType)
+                if ($PathType -eq 'Leaf') { return $true } else { return $false }
+            }
+            Mock -CommandName Write-Error -ModuleName PS-GiteaUtilities -MockWith { }
+        }
+
+        It 'Should not overwrite existing file without Force' {
+            $result = Invoke-GiteaFileDownload -downloadURL 'https://gitea.example.com/raw/path/to/existingfile.txt' -token 'abc123'
+
+            $result.Success | Should -Be $false
+            $result.Error | Should -Match 'already exists'
+        }
+    }
+
+    Context 'When download fails' {
+        BeforeEach {
+            Mock -CommandName New-Object -ModuleName PS-GiteaUtilities -MockWith {
+                $headers = New-Object System.Net.WebHeaderCollection
+    
+                $webClient = New-Object PSObject
+                Add-Member -InputObject $webClient -MemberType NoteProperty -Name Headers -Value $headers
+                Add-Member -InputObject $webClient -MemberType ScriptMethod -Name DownloadFile -Value {
+                    throw "Download failed intentionally"
+                }
+                Add-Member -InputObject $webClient -MemberType ScriptMethod -Name Dispose -Value {
+                    return $true
+                }
+    
+                return $webClient
+            }
+            Mock -CommandName Test-Path -ModuleName PS-GiteaUtilities -MockWith { $false }
+            Mock -CommandName New-Item -ModuleName PS-GiteaUtilities -MockWith { }
+            Mock -CommandName Write-Error -ModuleName PS-GiteaUtilities -MockWith { }
+        }
+    
+        It 'Should capture error and mark download as failed' {
+            $result = Invoke-GiteaFileDownload -downloadURL 'https://gitea.example.com/raw/path/to/badfile.txt' -token 'abc123'
+    
+            $result.Success | Should -Be $false
+            $result.Error | Should -Match 'Failed to download'
+        }
+    }
+}