PowerShell · adityapatwardhan · Mar 5, 2019 · Mar 3, 2019 · Mar 4, 2019 · Mar 5, 2019
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+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+Describe "Select-Xml DRT Unit Tests" -Tags "CI" {
+
+	BeforeAll {
+		$testfile = "TestDrive:\testfile.xml"
+		$xmlContent = @"
+<?xml version ="1.0" encoding="ISO-8859-1"?>
+<bookstore>
+	<book category="CHILDREN">
+		<title lang="english">Harry Potter</title>
+		<price>30.00</price>
+	</book>
+	<book category="WEB">
+		<title lang="english">Learning XML</title>
+		<price>25.00</price>
+	</book>
+</bookstore>
+"@
+		Set-Content -Path $testfile -Value $xmlContent
+	}
+
+	It "Can select text from an XML document"{
+		$results = Select-Xml -Path $testfile -XPath "/bookstore/book/title"
+		$results | Should -HaveCount 2
+		$results[0].Node."#text" | Should -BeExactly "Harry Potter"
+		$results[1].Node."#text" | Should -BeExactly "Learning XML"
+	}
+}
+
+Describe "Select-Xml Feature Tests" -Tags "Feature" {
+
+	BeforeAll {
+		$fileName = New-Item -Path "TestDrive:\testSelectXml.xml"
+		$xmlContent = @"
+<Root>
+   <Node Attribute='blah' />
+</Root>
+"@
+
+		Set-Content -Path $fileName -Value $xmlContent
+
+		$fileNameWithDots = $fileName.FullName.Replace("\", "\.\")
+
+		$driveLetter = [string]($fileName.FullName)[0]
+		$fileNameAsNetworkPath = "\\localhost\$driveLetter`$" + $fileName.FullName.SubString(2)
+
+		$testCases = @(
+			@{testName = 'Literalpath with relative paths'; testParameter = @{LiteralPath = $fileName.Name; XPath = 'Root'}},
+			@{testName = 'Literalpath with absolute paths'; testParameter = @{LiteralPath = $fileName.FullName; XPath = 'Root'}},
+			@{testName = 'Literalpath with path with dots'; testParameter = @{LiteralPath = $fileNameWithDots; XPath = 'Root'}},
+			@{testName = 'Path with relative paths'; testParameter = @{Path = $fileName.Name; XPath = 'Root'}},
+			@{testName = 'Path with absolute paths'; testParameter = @{Path = $fileName.FullName; XPath = 'Root'}},
+			@{testName = 'Path with path with dots'; testParameter = @{Path = $fileNameWithDots; XPath = 'Root'}}
+		)
+
+		if ( ! $IsCoreCLR ) {
+			$testcases += @{testName = 'Literalpath with network paths'; testParameter = @{LiteralPath = $fileNameAsNetworkPath; XPath = 'Root'}}
+			$testcases += @{testName = 'Path with network paths'; testParameter = @{LiteralPath = $fileNameAsNetworkPath; XPath = 'Root'}}
+		}
+
+		Push-Location -Path $fileName.Directory
+	}
+
+	AfterAll {
+		Pop-Location
+	}
+
+	It "Can work with input files using <testName>" -TestCases $testCases {
+		param($testParameter)
+
+		$node = Select-Xml @testParameter
+		$node | Should -HaveCount 1
+		$node.Path | Should -Be $fileName.FullName
+	}
+
+	It "Can work with input streams" {
+		[xml]$xml = "<a xmlns='bar'><b xmlns:b='foo'>hello</b><c>world</c></a>"
+		$node = Select-Xml -Xml $xml -XPath "//c:b" -Namespace @{c='bar'}
+		$node.Path | Should -BeExactly "InputStream"
+		$node.Pattern | Should -BeExactly "//c:b"
+		$node.ToString() | Should -BeExactly "hello"
+	}
+
+	It "Can throw on non filesystem paths using <parameter>" -TestCases @(
+		@{parameter="LiteralPath"; expectedError='ProcessingFile,Microsoft.PowerShell.Commands.SelectXmlCommand'},
+		@{parameter="Path";        expectedError='ProcessingFile,Microsoft.PowerShell.Commands.SelectXmlCommand'}
+	) {
+		param($parameter, $expectedError)
+
+		$env:xmltestfile = $xmlContent
+		$file = 'env:xmltestfile'
+		$params = @{$parameter=$file}
+		{ Select-Xml @params "Root" -ErrorAction Stop } | Should -Throw -ErrorId $expectedError
+		Remove-Item -Path 'env:xmltestfile'
+	}
+
+	It "Can throw for invalid XML file" {
+		$testfile = "TestDrive:\test.xml"
+		Set-Content -Path $testfile -Value "<a><b>"
+		{ Select-Xml -Path $testfile -XPath foo -ErrorAction Stop } | Should -Throw -ErrorId 'ProcessingFile,Microsoft.PowerShell.Commands.SelectXmlCommand'
+	}
+
+	It "Can throw for invalid XML namespace" {
+		[xml]$xml = "<a xmlns='bar'><b xmlns:b='foo'>hello</b><c>world</c></a>"
+		{ Select-Xml -Xml $xml -XPath foo -Namespace @{c=$null} -ErrorAction Stop } | Should -Throw -ErrorId 'PrefixError,Microsoft.PowerShell.Commands.SelectXmlCommand'
+	}
+
+	It "Can throw for invalid XML content" {
+		{ Select-Xml -Content "hello" -XPath foo -ErrorAction Stop } | Should -Throw -ErrorId 'InvalidCastToXmlDocument,Microsoft.PowerShell.Commands.SelectXmlCommand'
+	}
+
+	It "Can use ToString() on nested XML node" {
+		$node = Select-Xml -Content "<a><b>one<c>hello</c></b></a>" -XPath "//b"
+		$node.ToString() | Should -BeExactly "one<c>hello</c>"
+	}
+
+	It "Can use ToString() with file" {
+		$testfile = Join-Path $TestDrive "test.xml"
+		Set-Content -Path $testfile -Value "<a><b>hello</b></a>"
+		$node = Select-Xml -Path $testfile -XPath "//b"
+		$node.ToString() | Should -BeExactly "hello:$testfile"
+	}
+}