Not able to fetch the individual details from JSON data - powershell

Question

"Ns": {
"value": [
{
"Nname": "exa",
"SR": [
{
"name": "port1",
"properties": {
"description": "Allow port1",
"destinationPortRange": "1111",
"priority": 100
}
},
{
"name": "port1_0",
"properties": {
"description": "Allow port1",
"destinationPortRange": "1111",
"priority": 150
}
},
{
"name": "port2",
"properties": {
"description": "Allow 1115",
"destinationPortRange": "1115",
"priority": 100,
}
}
]
}
]
}
Want to assert the details of priority and name but was not able to do it.
Here is what I have implemented:
$Ndetails = templateProperties.parameters.Ns.value.SR
foreach ($Ndata in $Ndetails) {
$Ndata .properties.destinationPortRange |
Should -BeExactly #('1111','1111','1115')
} 
How to resolve the same using Pester in PowerShell?

Answer 1

You don't need to use foreach for this. You can just use Select-Object for this. Assuming your JSON is as #Mark Wragg linked in the comments:
$Json = #'
[{
"Ns": {
"value": [{
"Nname": "exa",
"SR": [{
"name": "port1",
"properties": {
"description": "Allow port1",
"destinationPortRange": "1111",
"priority": 100
}
},
{
"name": "port1_0",
"properties": {
"description": "Allow port1",
"destinationPortRange": "1111",
"priority": 150
}
},
{
"name": "port2",
"properties": {
"description": "Allow 1115",
"destinationPortRange": "1115",
"priority": 100
}
}
]
}]
}
}]
'#
$t = $Json | ConvertFrom-Json
Your test file should look like this:
$result = $t.Ns.value.SR.properties.destinationPortRange
it 'destinationPortRange matches' {
$result | Should -BeExactly #('1111','1111','1115')
}
Explanation
Your use of foreach was incorrect as you compared single element (also notice that I deleted unnecessary space)
$Ndata.properties.destinationPortRange
to the array
| Should -BeExactly #('1111','1111','1115')
What you have to do is to compare array to array as in my example.