比较两个PsCustomObjects数组

Question

有没有一种简单的方法可以比较两个PsCustomObject数组？

示例A（与订单无关）：

$Expected = @()
$Expected += [PsCustomObject]@{Table='patient';ColumnName='id'}
$Expected += [PsCustomObject]@{Table='patient';ColumnName='mrn'}

$Actual = @()
$Actual += [PsCustomObject]@{Table='patient';ColumnName='mrn'}
$Actual += [PsCustomObject]@{Table='patient';ColumnName='id'}

Compare-ByFoo ($Expected $Actual).Count | Should Be 0

示例B（缺失值）：

$Expected = @()
$Expected += [PsCustomObject]@{Table='patient';ColumnName='id'}
$Expected += [PsCustomObject]@{Table='patient';ColumnName='mrn'}

$Actual = @()
$Actual += [PsCustomObject]@{Table='';ColumnName='id'}
$Actual += [PsCustomObject]@{Table='patient';ColumnName='id'}

Compare-ByFoo ($Expected $Actual).Count | Should Be 1

示例C（缺少属性）：

$Expected = @()
$Expected += [PsCustomObject]@{Table='patient';ColumnName='id'}
$Expected += [PsCustomObject]@{Table='patient';ColumnName='mrn'}

$Actual = @()
$Actual += [PsCustomObject]@{Table='patient'}
$Actual += [PsCustomObject]@{Table='patient';ColumnName='id'}

Compare-ByFoo ($Expected $Actual).Count | Should Be 1

示例D（缺少记录）：

$Expected = @()
$Expected += [PsCustomObject]@{Table='patient';ColumnName='id'}
$Expected += [PsCustomObject]@{Table='patient';ColumnName='mrn'}

$Actual = @()
$Actual += [PsCustomObject]@{Table='patient';ColumnName='id'}

Compare-ByFoo ($Expected $Actual).Count | Should Be 1

Answer 1

您可以使用Compare-Object并告诉它要比较的属性：

@(Compare-Object $Expected $Actual -Property Table, ColumnName |
    Where-Object { $_.SideIndicator -eq '=>' }).Count

这些属性甚至可以从预期或实际对象之一中提取，只要它们都具有相同的结构：

$props = $Expected[0].PSObject.Properties | Select-Object -Expand Name
@(Compare-Object $Expected $Actual -Property $props |
    Where-Object { $_.SideIndicator -eq '=>' }).Count