ItemLinkManagement

0.5.1

Public/New-ItemLink.Tests.ps1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
 $here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.'
. "$here\$sut"

Describe "New-ItemLink" -Tag 'Unit' {

    $testDrive = Convert-Path 'TestDrive:\'

    # Note: All our test files will be hidden files, for the sake of Windows

    # Source of truth
    $testFileFullName = Join-Path $testDrive '.testfile'
    $testDirectoryFullName = Join-Path $testDrive '.testdirectory'

    # Link
    $testFileLinkFullName = Join-Path $testDrive '.testfilelink'
    $testDirectoryLinkFullName = Join-Path $testDrive '.testdirectorylink'

    AfterEach {
        # Powershell 5 requires a special way to remove a SymbolicLink, see: https://stackoverflow.com/a/63172492
        if ($PSVersionTable.PSVersion.Major -le 5) {
            Get-ChildItem "$testDrive/*" -Attributes ReparsePoint | % { $_.Delete() }
        }
        Get-Item "$testDrive/*" -Force | Remove-Item -Recurse -Force
    }

    Context 'Exceptions' {

        It "Should throw when ItemType is invalid" {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $params = @{
                ItemType = 'foo'
                Path = $testFileLinkFullName
                Value = $testFile.FullName
                ErrorAction = 'Stop'
            }

            { New-ItemLink @params } | Should -Throw 'does not belong to the set'
        }
    }

    Context 'Error stream' {

        It "Should output to error stream" {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $params = @{
                ItemType = 'SymbolicLink'
                Path = $testFile.FullName # Deliberately simulate an error by trying to create a link in place of its file
                Value = $testFile.FullName
                ErrorVariable = 'err'
                ErrorAction = 'Continue'
            }

            $err = New-ItemLink @params 2>&1

            $err | ? { $_ -is [System.Management.Automation.ErrorRecord] } | Should -Not -Be $null
        }

        It "Should not output to error stream" {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $params = @{
                ItemType = 'SymbolicLink'
                Path = $testFile.FullName # Deliberately simulate an error by trying to create a link in place of its file
                Value = $testFile.FullName
                ErrorAction = 'SilentlyContinue'
            }

            $err = New-ItemLink @params 2>&1

            $err | ? { $_ -is [System.Management.Automation.ErrorRecord] } | Should -Be $null
        }

    }

    Context 'Behavior' {

        It "Should create HardLink for file" {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $params = @{
                ItemType = 'HardLink'
                Path = $testFileLinkFullName
                Value = $testFile.FullName
                ErrorAction = 'Stop'
            }

            $result = New-ItemLink @params

            $result | Should -BeOfType [System.IO.FileInfo]
            $result.LinkType | Should -Be $params['ItemType']
        }

        It 'Should create a HardLink for file even if it already exists when using -Force' {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $testFileLink = New-Item $testFileLinkFullName -Value $testFile.FullName -ItemType 'HardLink' -Force
            $testFileLink.Attributes += 'Hidden'
            $params = @{
                ItemType = 'HardLink'
                Path = $testFileLink.FullName
                Value = $testFile.FullName
                Force = $true
                ErrorAction = 'Stop'
            }

            $result = New-ItemLink @params

            $result | Should -BeOfType [System.IO.FileInfo]
            $result.LinkType | Should -Be $params['ItemType']
        }

        It "Should create SymbolicLink for file" {
            $testFile = New-Item $testFileFullName -ItemType File -Force
            $testFile.Attributes += 'Hidden'
            $params = @{
                ItemType = 'SymbolicLink'
                Path = $testFileLinkFullName
                Value = $testFile.FullName
                ErrorAction = 'Stop'
            }

            $result = New-ItemLink @params

            $result | Should -BeOfType [System.IO.FileInfo]
            $result.LinkType | Should -Be $params['ItemType']
        }

        It "Should create Junction for directory (Windows)" {
            if ($env:OS -eq 'Windows_NT') {
                $testDirectory = New-Item $testDirectoryFullName -ItemType Directory -Force
                $testDirectory.Attributes += 'Hidden'
                $params = @{
                    ItemType = 'Junction'
                    Path = $testDirectoryLinkFullName
                    Value = $testDirectory.FullName
                    ErrorAction = 'Stop'
                }

                $result = New-ItemLink @params

                $result | Should -BeOfType [System.IO.DirectoryInfo]
                $result.LinkType | Should -Be $params['ItemType']
            }else {
                $true
            }
        }

        It 'Should create a Junction for directory even if it already exists when using -Force (Windows)' {
            if ($env:OS -eq 'Windows_NT') {
                $testDirectory = New-Item $testDirectoryFullName -ItemType Directory -Force
                $testDirectory.Attributes += 'Hidden'
                $testDirectoryLink = New-Item $testDirectoryLinkFullName -Value $testDirectory.FullName -ItemType 'Junction' -Force
                $testDirectoryLink.Attributes += 'Hidden'
                $params = @{
                    ItemType = 'Junction'
                    Path = $testDirectoryLink.FullName
                    Value = $testDirectory.FullName
                    Force = $true
                    ErrorAction = 'Stop'
                }

                $result = New-ItemLink @params

                $result | Should -BeOfType [System.IO.DirectoryInfo]
                $result.LinkType | Should -Be $params['ItemType']
            }else {
                $true
            }
        }

        It "Should create SymbolicLink for directory" {
            $testDirectory = New-Item $testDirectoryFullName -ItemType Directory -Force
            $testDirectory.Attributes += 'Hidden'
            $params = @{
                ItemType = 'SymbolicLink'
                Path = $testDirectoryLinkFullName
                Value = $testDirectory.FullName
                ErrorAction = 'Stop'
            }

            $result = New-ItemLink @params

            $result | Should -BeOfType [System.IO.DirectoryInfo]
            $result.LinkType | Should -Be $params['ItemType']
        }

        It 'Should create a SymbolicLink for directory even if it already exists when using -Force' {
            $testDirectory = New-Item $testDirectoryFullName -ItemType Directory -Force
            $testDirectory.Attributes += 'Hidden'
            $testDirectoryLink = New-Item $testDirectoryLinkFullName -Value $testDirectory.FullName -ItemType 'SymbolicLink' -Force
            $testDirectoryLink.Attributes += 'Hidden'
            $params = @{
                ItemType = 'SymbolicLink'
                Path = $testDirectoryLink.FullName
                Value = $testDirectory.FullName
                Force = $true
                ErrorAction = 'Stop'
            }

            $result = New-ItemLink @params

            $result | Should -BeOfType [System.IO.DirectoryInfo]
            $result.LinkType | Should -Be $params['ItemType']
        }

    }
}