tests/Constructors.Tests.ps1
|
Import-Module Pester Import-Module './Get-DataHash.psd1' Describe "DataHash Constructors" { BeforeAll { # Sample Data $simpleObject = @{ Name = "John"; Age = 30 } $complexObject = @{ User = @{ Name = "Alice" Details = @{ ID = 123; Email = "alice@example.com" } } Roles = @("Admin", "Editor") } $ignoreFields = [System.Collections.Generic.HashSet[string]]::new() $ignoreFields.Add("Age") } It "Default constructor should initialize with expected defaults" { $hashObj = [DataHash]::new() $hashObj.Hash | Should -BeNullOrEmpty $hashObj.Digest($simpleObject) $hashObj.Hash | Should -Not -BeNullOrEmpty $hashObj | Should -BeOfType [DataHash] $hashObj.HashAlgorithm | Should -Be 'SHA256' } It "Constructor with object should generate a valid hash" { $hashObj = [DataHash]::new($simpleObject) $hashObj | Should -Not -BeNullOrEmpty $hashObj.Hash | Should -Match "^[0-9A-Fa-f]{64}$" # Assuming SHA256 default } It "Constructor with object and ignore fields should exclude specified fields" { $hash1 = [DataHash]::new($simpleObject) $hash2 = [DataHash]::new($simpleObject, $ignoreFields) $hash1.Hash | Should -Not -Be $hash2.Hash # Should be different due to ignored field } It "Constructor with object, ignore fields, and algorithm should apply correct hashing" { $hashMD5 = [DataHash]::new($simpleObject, $ignoreFields, [DataHashAlgorithmType]::MD5) $hashSHA512 = [DataHash]::new($simpleObject, $ignoreFields, [DataHashAlgorithmType]::SHA512) $hashMD5.Hash | Should -Match "^[0-9A-Fa-f]{32}$" # MD5 = 32 hex chars $hashSHA512.Hash | Should -Match "^[0-9A-Fa-f]{128}$" # SHA512 = 128 hex chars } It "Constructor should handle null input gracefully" { { [DataHash]::new($null) } | Should -Throw -ErrorId '*Input cannot be null*' } It "Constructor should handle empty dictionaries" { $hashEmptyDict = [DataHash]::new(@{}) $hashEmptyDict.Hash | Should -Not -BeNullOrEmpty } It "Constructor should handle empty objects and collections" { $hashEmptyArray = [DataHash]::new(@()) $hashEmptyArray.Hash | Should -Not -BeNullOrEmpty } It "Handles complex nested objects correctly" { $hashComplex1 = [DataHash]::new($complexObject) $hashComplex2 = [DataHash]::new($complexObject) $hashComplex1.Hash | Should -Be $hashComplex2.Hash # Same data, should match } It "Detects circular references and does not crash" { $circularObject = @{ Name = "Bob" } $circularObject["Self"] = $circularObject # Introduce circular reference { [DataHash]::new($circularObject) } | Should -Not -Throw } } |