PSMatcher

PSMatcher is a test utility, that lets you easier test responses and json, when some part of the response is something out of your control (autogenerated id, guid, datetime etc).

It's here on the PowerShell Gallery

Overview

This PowerShell has been tested on Windows in both v5.1 and v6.0

Import-Module -Name "$PSScriptRoot\..\PSMatcher.psm1" -Force

$actual = @"
{
    "id" : "5a645a20-5225-431b-8c62-031b87f58b73",
    "subnode" : {
        "city" : "NY",
        "zipCode" : "80-000",
        "meta" : {
            "name" : "foobar",
            "shipping": 99.99,            
            "enabled" : false,
            "_link" : "http://example.com?page=2",
            "_something" : null,
            "_arr" : [1, 2, 3],
            "_date" : "2018-01-01"
        }
    }
}
"@

$expected = @"
{
    "id" : "@guid@",
    "subnode" : {
        "city" : "NY",
        "zipCode" : "@string@",
        "meta" : {
            "name" : "@[email protected]('bar')",
            "shipping": "@double@",
            "enabled" : "@bool@",
            "_link" : "@any@",
            "_something" : "@null@",
            "_arr" : [1, 2, 3],
            "_date" : "@[email protected]()"
        }
    }
}
"@

# True Result
Test-Json -Value $actual -Reference $expected

# False Result
Test-Json -Value $actual -Reference '{}'

Results

Successful ErrorMessage                              Result                  
---------- ------------                              ------                  
      True                                           NMatcher.Matching.Result
     False Expected value did not appear at path id. NMatcher.Matching.Result

In addition

The matcher also checks if elements are missing or if too many are supplied.

Stay Tuned: Examples will be added showing how well this works with PowerShell objects and Hashtables.

Available Expressions

• @string@
• @int@
• @double@
• @bool@
• @null@
• @any@
• @guid@

Credits

This wraps NMatcher. Check out that readme for more detail.