UseDeclaredVarsMoreThanAssignments for variables in Pester v5

[rcdailey]

Using version v2020.6.0 of the PowerShell Extension for VS Code, I am getting a UseDeclaredVarsMoreThanAssignments in my Pester v5 test. The test case is this:

Describe "My Tests" {
    BeforeAll {
        $myVariable = 100
    }

    Context "My Context" {
        It "My Test" {
            $myVariable | Should -Not -Be $null
        }
    }
}

As seen in the screenshot below, I get a false positive warning on the assignment of $myVariable:

When I run this Pester test, it passes just fine. The variable $myVariable is actually used at line 8. However, I think due to the Pester framework, the analyzer isn't able to see that the variable is within scope. I'm honestly not sure what version of PSScriptAnalyzer is bundled in this VS Code extension.

The expected behavior is that this variable does not appear as an analysis warning in the context of Pester.

[bergmeister]

This is a well known issue in this repo if you search through issues as Pester is a DSL that PSSA does not know about. Closing as a duplicate of #946

[rcdailey]

I did do quite a bit of searching, but all I had to go on was the keyword UseDeclaredVarsMoreThanAssignments, to which I found no results.