Add tests for iPerf3 install

windows/Install-iPerf3.Tests.ps1

@@ -0,0 +1,67 @@
+Describe 'Install-IPerf3' {
+    BeforeAll {
+        Set-Item function:Install-IPerf3 ([ScriptBlock]::Create((Get-Content -Raw 'windows\Install-iPerf3.ps1')))
+    }
+
+    It 'Has the correct parameters' {
+        $params = (Get-Command Install-iPerf3).Parameters
+
+        $params.ContainsKey('DestinationPath') | Should -Be $true
+        $params['DestinationPath'].ParameterType.Name | Should -Be 'String'
+
+        $params.ContainsKey('ServerService') | Should -Be $true
+        $params['ServerService'].ParameterType.Name | Should -Be 'SwitchParameter'
+    }
+
+    Context 'Without ServerService parameter' {
+        It 'Should download and install iPerf3 without errors' {
+            { Install-iPerf3 -DestinationPath 'C:\Program Files\iPerf3' } | Should -Not -Throw
+        }
+
+        It 'Should add iPerf3 to the system PATH' {
+            $env:PATH | Should -Match 'C:\\Program Files\\iPerf3\\'
+        }
+
+        It 'Should create the iPerf3 installation directory' {
+            Test-Path -Path 'C:\Program Files\iPerf3' | Should -Be $true
+        }
+
+        It 'Should create the iPerf3 executable in the installation directory' {
+            Test-Path -Path 'C:\Program Files\iPerf3\iperf3.exe' | Should -Be $true
+        }
+
+        It 'Should add a firewall rule for iPerf3' {
+            $firewallRule = Get-NetFirewallRule -DisplayName 'Allow iPerf3' -ErrorAction SilentlyContinue
+            $firewallRule | Should -Not -Be $null
+        }
+
+        AfterAll {
+            # Clean up any existing iPerf3 installation
+            if (Get-Service -Name iperf3server -ErrorAction SilentlyContinue) {
+                Stop-Service -Name iperf3server -Force
+                Remove-Service -Name iperf3server
+            }
+            Remove-Item -Path 'C:\Program Files\iPerf3' -Recurse -Force -ErrorAction SilentlyContinue
+            Remove-NetFirewallRule -DisplayName 'Allow iPerf3' -ErrorAction SilentlyContinue
+        }
+    }
+
+    Context 'With ServerService parameter' {
+        It 'Should install iPerf3 as a Windows service when ServerService is specified' {
+            { Install-iPerf3 -DestinationPath 'C:\Program Files\iPerf3' -ServerService } | Should -Not -Throw
+            $service = Get-Service -Name iperf3server -ErrorAction SilentlyContinue
+            $service | Should -Not -Be $null
+            $service.Status | Should -Be 'Running'
+        }
+
+        AfterAll {
+            # Clean up any existing iPerf3 installation
+            if (Get-Service -Name iperf3server -ErrorAction SilentlyContinue) {
+                Stop-Service -Name iperf3server -Force
+                Remove-Service -Name iperf3server
+            }
+            Remove-Item -Path 'C:\Program Files\iPerf3' -Recurse -Force -ErrorAction SilentlyContinue
+            Remove-NetFirewallRule -DisplayName 'Allow iPerf3' -ErrorAction SilentlyContinue
+        }
+    }
+}