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Set-StrictMode -Version Latest

InModuleScope Pester {
    Describe "New-PesterState" {
        Context "TestNameFilter parameter is set" {
            $p = new-pesterstate -TestNameFilter "filter"

            it "sets the TestNameFilter property" {
                $p.TestNameFilter | should be "filter"
            }

        }
        Context "TagFilter parameter is set" {
            $p = new-pesterstate -TagFilter "tag","tag2"

            it "sets the TestNameFilter property" {
                $p.TagFilter | should be ("tag","tag2")
            }
        }

        Context "ExcludeTagFilter parameter is set" {
            $p = new-pesterstate -ExcludeTagFilter "tag3", "tag"

            it "sets the ExcludeTagFilter property" {
                $p.ExcludeTagFilter | should be ("tag3", "tag")
            }
        }

        Context "TagFilter and ExcludeTagFilter parameter are set" {
            $p = new-pesterstate -TagFilter "tag","tag2" -ExcludeTagFilter "tag3"

            it "sets the TestNameFilter property" {
                $p.TagFilter | should be ("tag","tag2")
            }

            it "sets the ExcludeTagFilter property" {
                $p.ExcludeTagFilter | should be ("tag3")
            }
        }
        Context "TestNameFilter and TagFilter parameter is set" {
            $p = new-pesterstate -TagFilter "tag","tag2" -testnamefilter "filter"

            it "sets the TestNameFilter property" {
                $p.TagFilter | should be ("tag","tag2")
            }

            it "sets the TestNameFilter property" {
                $p.TagFilter | should be ("tag","tag2")
            }

        }
    }

    Describe "Pester state object" {
        $p = New-PesterState

        Context "entering describe" {
            It "enters describe" {
                $p.EnterDescribe("describe")
                $p.CurrentDescribe | should be "Describe"
            }
            It "can enter describe only once" {
                { $p.EnterDescribe("describe") } | Should Throw
            }

            It "Reports scope correctly" {
                $p.Scope | should be "describe"
            }
        }
        Context "leaving describe" {
            It "leaves describe" {
                $p.LeaveDescribe()
                $p.CurrentDescribe | should benullOrEmpty
            }
            It "Reports scope correctly" {
                $p.Scope | should benullOrEmpty
            }
        }

        context "Entering It from Describe" {
            $p.EnterDescribe('Describe')

            It "Enters It successfully" {
                { $p.EnterTest("It") } | Should Not Throw
            }

            It "Reports scope correctly" {
                $p.Scope | Should Be 'It'
            }

            It "Cannot enter It after already entered" {
                { $p.EnterTest("It") } | Should Throw
            }

            It "Cannot enter Context from inside It" {
                { $p.EnterContext("Context") } | Should Throw
            }
        }

        context "Leaving It from Describe" {
            It "Leaves It to Describe" {
                { $p.LeaveTest() } | Should Not Throw
            }

            It "Reports scope correctly" {
                $p.Scope | Should Be 'Describe'
            }

            $p.LeaveDescribe()
        }

        Context "entering Context" {
            it "Cannot enter Context before Describe" {
                { $p.EnterContext("context") } | should throw
            }

            it "enters context from describe" {
                $p.EnterDescribe("Describe")
                $p.EnterContext("Context")
                $p.CurrentContext | should be "Context"
            }
            It "can enter context only once" {
                { $p.EnterContext("Context") } | Should Throw
            }

            It "Reports scope correctly" {
                $p.Scope | should be "Context"
            }
        }

        Context "leaving context" {
            it "cannot leave describe before leaving context" {
                { $p.LeaveDescribe() } | should throw
            }
            it "leaves context" {
                $p.LeaveContext()
                $p.CurrentContext | should BeNullOrEmpty
            }
            It "Returns from context to describe" {
                $p.Scope | should be "Describe"
            }

            $p.LeaveDescribe()
        }

        context "Entering It from Context" {
            $p.EnterDescribe('Describe')
            $p.EnterContext('Context')

            It "Enters It successfully" {
                { $p.EnterTest("It") } | Should Not Throw
            }

            It "Reports scope correctly" {
                $p.Scope | Should Be 'It'
            }

            It "Cannot enter It after already entered" {
                { $p.EnterTest("It") } | Should Throw
            }
        }

        context "Leaving It from Context" {
            It "Leaves It to Context" {
                { $p.LeaveTest() } | Should Not Throw
            }

            It "Reports scope correctly" {
                $p.Scope | Should Be 'Context'
            }

            $p.LeaveContext()
            $p.LeaveDescribe()
        }

        context "adding test result" {
            $p.EnterDescribe('Describe')

            it "adds passed test" {
                $p.AddTestResult("result","Passed", 100)
                $result = $p.TestResult[-1]
                $result.Name | should be "result"
                $result.passed | should be $true
                $result.Result | Should be "Passed"
                $result.time.ticks | should be 100
            }
            it "adds failed test" {
                try { throw 'message' } catch { $e = $_ }
                $p.AddTestResult("result","Failed", 100, "fail", "stack","suite name",@{param='eters'},$e)
                $result = $p.TestResult[-1]
                $result.Name | should be "result"
                $result.passed | should be $false
                $result.Result | Should be "Failed"
                $result.time.ticks | should be 100
                $result.FailureMessage | should be "fail"
                $result.StackTrace | should be "stack"
                $result.ParameterizedSuiteName | should be "suite name"
                $result.Parameters['param'] | should be 'eters'
                $result.ErrorRecord.Exception.Message | should be 'message'
            }

            it "adds skipped test" {
                $p.AddTestResult("result","Skipped", 100)
                $result = $p.TestResult[-1]
                $result.Name | should be "result"
                $result.passed | should be $true
                $result.Result | Should be "Skipped"
                $result.time.ticks | should be 100
            }

            it "adds Pending test" {
                $p.AddTestResult("result","Pending", 100)
                $result = $p.TestResult[-1]
                $result.Name | should be "result"
                $result.passed | should be $true
                $result.Result | Should be "Pending"
                $result.time.ticks | should be 100
            }

            it "can add test result before entering describe" {
                if ($p.CurrentContext) { $p.LeaveContext()}
                if ($p.CurrentDescribe) { $p.LeaveDescribe() }
                { $p.addTestResult(1,"Passed",1) } | should not throw
            }

            $p.LeaveContext()
            $p.LeaveDescribe()

        }

        Context "Path and TestNameFilter parameter is set" {
            $strict = New-PesterState -Strict

            It "Keeps Passed state" {
                $strict.AddTestResult("test","Passed")
                $result = $strict.TestResult[-1]

                $result.passed | should be $true
                $result.Result | Should be "Passed"
            }

            It "Keeps Failed state" {
                $strict.AddTestResult("test","Failed")
                $result = $strict.TestResult[-1]

                $result.passed | should be $false
                $result.Result | Should be "Failed"
            }

            It "Changes Pending state to Failed" {
                $strict.AddTestResult("test","Pending")
                $result = $strict.TestResult[-1]

                $result.passed | should be $false
                $result.Result | Should be "Failed"
            }

            It "Changes Skipped state to Failed" {
                $strict.AddTestResult("test","Skipped")
                $result = $strict.TestResult[-1]

                $result.passed | should be $false
                $result.Result | Should be "Failed"
            }
        }
    }
    Describe ConvertTo-FailureLines {
        $testPath = Join-Path $TestDrive test.ps1
        $escapedTestPath = [regex]::Escape($testPath)
        It 'produces correct message lines.' {
            try { throw 'message' } catch { $e = $_ }

            $r = $e | ConvertTo-FailureLines

            $r.Message[0] | Should be 'RuntimeException: message'
            $r.Message.Count | Should be 1
        }
        It 'failed should produces correct message lines.' {
            try { 'One' | Should be 'Two' } catch { $e = $_ }
            $r = $e | ConvertTo-FailureLines

            $r.Message[0] | Should be 'String lengths are both 3. Strings differ at index 0.'
            $r.Message[1] | Should be 'Expected: {Two}'
            $r.Message[2] | Should be 'But was:  {One}'
            $r.Message[3] | Should be '-----------^'
            $r.Message[4] | Should match "'One' | Should be 'Two'"
            $r.Message.Count | Should be 5
        }
        Context 'should fails in file' {
            Set-Content -Path $testPath -Value @'
                $script:IgnoreErrorPreference = 'SilentlyContinue'
                'One' | Should be 'Two'
'@

            try { & $testPath } catch { $e = $_ }
            $r = $e | ConvertTo-FailureLines

            It 'produces correct message lines.' {


                $r.Message[0] | Should be 'String lengths are both 3. Strings differ at index 0.'
                $r.Message[1] | Should be 'Expected: {Two}'
                $r.Message[2] | Should be 'But was:  {One}'
                $r.Message[3] | Should be '-----------^'
                $r.Message[4] | Should be "2:                 'One' | Should be 'Two'"
                $r.Message.Count | Should be 5
            }
            if ( $e | Get-Member -Name ScriptStackTrace )
            {
                It 'produces correct trace lines.' {
                    $r.Trace[0] | Should be "at <ScriptBlock>, $testPath`: line 2"
                    $r.Trace[1] -match 'at <ScriptBlock>, .*\\Functions\\PesterState.Tests.ps1: line [0-9]*$' |
                        Should be $true
                    $r.Trace.Count | Should be 2
                }
            }
            else
            {
                It 'produces correct trace lines.' {
                    $r.Trace[0] | Should be "at line: 2 in $testPath"
                    $r.Trace.Count | Should be 1
                }
            }
        }
        Context 'exception thrown in nested functions in file' {
            Set-Content -Path $testPath -Value @'
                function f1 {
                    throw 'f1 message'
                }
                function f2 {
                    f1
                }
                f2
'@

            try { & $testPath } catch { $e = $_ }

            $r = $e | ConvertTo-FailureLines

            It 'produces correct message lines.' {
                $r.Message[0] | Should be 'RuntimeException: f1 message'
            }
            if ( $e | Get-Member -Name ScriptStackTrace )
            {
                It 'produces correct trace lines.' {
                    $r.Trace[0] | Should be "at f1, $testPath`: line 2"
                    $r.Trace[1] | Should be "at f2, $testPath`: line 5"
                    $r.Trace[2] | Should be "at <ScriptBlock>, $testPath`: line 7"
                    $r.Trace[3] -match 'at <ScriptBlock>, .*\\Functions\\PesterState.Tests.ps1: line [0-9]*$' |
                        Should be $true
                    $r.Trace.Count | Should be 4
                }
            }
            else
            {
                It 'produces correct trace lines.' {
                    $r.Trace[0] | Should be "at line: 2 in $testPath"
                    $r.Trace.Count | Should be 1
                }
            }
        }
        Context 'nested exceptions thrown in file' {
            Set-Content -Path $testPath -Value @'
                try
                {
                    throw New-Object System.ArgumentException(
                        'inner message',
                        'param_name'
                    )
                }
                catch
                {
                    throw New-Object System.FormatException(
                        'outer message',
                        $_.Exception
                    )
                }
'@

            try { & $testPath } catch { $e = $_ }

            $r = $e | ConvertTo-FailureLines

            It 'produces correct message lines.' {
                $r.Message[0] | Should be 'ArgumentException: inner message'
                $r.Message[1] | Should be 'Parameter name: param_name'
                $r.Message[2] | Should be 'FormatException: outer message'
            }
            if ( $e | Get-Member -Name ScriptStackTrace )
            {
                It 'produces correct trace line.' {
                    $r.Trace[0] | Should be "at <ScriptBlock>, $testPath`: line 10"
                    $r.Trace[1] -match 'at <ScriptBlock>, .*\\Functions\\PesterState.Tests.ps1: line [0-9]*$'
                    $r.Trace.Count | Should be 2
                }
            }
            else
            {
                It 'produces correct trace line.' {
                    $r.Trace[0] | Should be "at line: 10 in $testPath"
                    $r.Trace.Count | Should be 1
                }
            }
        }
    }
}