Fix path resolution for public functions and add test for public function files

Author: marko-stanojevic

tests/Integration/Module.Integration.Tests.ps1

@@ -51,7 +51,7 @@ Describe 'PSScriptModule Integration Tests' -Tag 'Integration' {
             $exportedCommands = $module.ExportedCommands.Keys
 
             # Discover public functions from source
-            $publicFunctionsPath = Resolve-Path -Path (Join-Path -Path $PSScriptRoot -ChildPath '../../src/Public')
+            $publicFunctionsPath = Resolve-Path -Path (Join-Path -Path $PSScriptRoot -ChildPath '../../src/Public/')
             $publicFunctionFiles = Get-ChildItem -Path $publicFunctionsPath -Include '*.ps1' -Exclude '*.Tests.ps1' -Recurse |
             Select-Object -ExpandProperty BaseName
         }
@@ -60,6 +60,10 @@ Describe 'PSScriptModule Integration Tests' -Tag 'Integration' {
             $exportedCommands.Count | Should -BeGreaterThan 0
         }
 
+        It 'Public function files' {
+            $publicFunctionFiles | Should -Be 1
+        }
+
         It 'Should discover public functions from src/Public' {
             $publicFunctionFiles.Count | Should -BeGreaterThan 0 -Because 'src/Public should contain at least one public function'
         }