Pester testing framework basics in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a Pester test block.

PowerShell

Describe 'MyFunction' { It 'should return true' { [1] } }

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AMyFunction | Should -Be $true

BMyFunction -eq $true

CAssert-True MyFunction

DTest-MyFunction -IsTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using comparison operators like -eq directly without Should.

Trying to call non-existent commands like Assert-True.

The Should command is used inside It blocks to assert expected results in Pester.

2fill in blank

medium

Complete the code to run all Pester tests in the current directory.

PowerShell

Invoke-Pester -[1] .

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AScript

BFile

CTest

DPath

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter names like -File or -Script.

Not specifying any path and expecting tests to run automatically.

The -Path parameter tells Invoke-Pester where to find test files.

3fill in blank

hard

Fix the error in the test assertion to check if a value equals 5.

PowerShell

$result = 5; $result | Should [1] 5

Drag options to blanks, or click blank then click option'

A-Be

B-BeGreaterThan

C-EqualTo

D-Equals

Attempts:

3 left

💡 Hint

Common Mistakes

Using operators like -EqualTo or -Equals which are not valid in Pester.

Using comparison operators like -eq instead of Should -Be.

The correct Pester assertion to check equality is -Be.

4fill in blank

hard

Fill both blanks to create a test that checks if a string contains 'hello'.

PowerShell

Describe 'String tests' { It 'contains hello' { 'hello world' | Should [1] [2] } }

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A-Match

B-Contain

C'hello'

D'world'

Attempts:

3 left

💡 Hint

Common Mistakes

Using -Contain which is for collections, not strings.

Using the wrong substring or pattern.

Use -Match to check if a string matches a pattern, and the pattern here is 'hello'.

5fill in blank

hard

Fill all three blanks to create a test that checks if a list has exactly 3 items.

PowerShell

Describe 'List tests' { It 'has 3 items' { $list = @(1,2,3); $list.[1] | Should [2] [3] } }

Drag options to blanks, or click blank then click option'

ACount

B-Be

C3

DLength

Attempts:

3 left

💡 Hint

Common Mistakes

Using Length instead of Count in PowerShell arrays.

Using wrong assertion operators or values.

Use Count property to get number of items, then Should -Be 3 to assert the count.