Fix some tests on linux (#2153)

* fix bom reading test in PowerShell 6

* Use join-path to fix test on Linux

Author: leonyu

test/00-Project.Tests.ps1

@@ -97,14 +97,38 @@ describe 'Style constraints for non-binary project files' {
         # utf-8 BOM == 0xEF 0xBB 0xBF
         # see http://www.powershellmagazine.com/2012/12/17/pscxtip-how-to-determine-the-byte-order-mark-of-a-text-file @@ https://archive.is/RgT42
         # ref: http://poshcode.org/2153 @@ https://archive.is/sGnnu
+
+        # As of PowerShell 6.0, `Get-Content` on non-Windows platform does not support `-Encoding Byte`
+        # The following try-catch is to work around that by using .NET framework
+        $read_bytes_type = 'default'
+        function read_bytes ([string]$FileName, [int]$Size) {
+            if ($read_bytes_type -eq 'default') {
+                return Get-Content "$FileName" -Encoding Byte -TotalCount $Size
+            }
+            else {
+                $buffer = [byte[]](0, 0, 0)
+                $fstream = (New-Object -TypeName System.IO.FileStream -ArgumentList ("$FileName", [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read))
+                $fstream.Read($buffer, 0, $Size) > $null
+                return $buffer
+            }
+        }
+        try {
+            # Following would throw exception if `-Encoding Byte` is not supported
+            $null = read_bytes -FileName $MyInvocation.PSCommandPath -Size 3
+        }
+        catch {
+            $read_bytes_type = 'dotnet'
+        }
+
         $badFiles = @(
             foreach ($file in $files)
             {
                 # Ignore previous TestResults.xml
                 if ($file -match "TestResults.xml") {
                     continue
                 }
-                $content = ([char[]](Get-Content $file.FullName -encoding byte -totalcount 3) -join '')
+                $buffer = read_bytes -FileName "$($file.FullName)" -Size 3
+                $content = ([char[]]$buffer -join '')
                 if ([regex]::match($content, '(?ms)^\xEF\xBB\xBF').success)
                 {
                     $file.FullName

test/Scoop-Install.Tests.ps1

@@ -159,30 +159,30 @@ describe 'compute_hash' {
     }
 
     it 'computes MD5 correctly' {
-        compute_hash "$working_dir\\invalid_wget.json" 'md5' | Should be "cf229eecc201063e32b436e73b71deba"
-        compute_hash "$working_dir\\wget.json" 'md5' | Should be "57c397fd5092cbd6a8b4df56be2551ab"
-        compute_hash "$working_dir\\broken_schema.json" 'md5' | Should be "0427c7f4edc33d6d336db98fc160beb0"
-        compute_hash "$working_dir\\broken_wget.json" 'md5' | Should be "30a7d4d3f64cb7a800d96c0f2ccec87f"
+        compute_hash (join-path "$working_dir" "invalid_wget.json") 'md5' | Should be "cf229eecc201063e32b436e73b71deba"
+        compute_hash (join-path "$working_dir" "wget.json") 'md5' | Should be "57c397fd5092cbd6a8b4df56be2551ab"
+        compute_hash (join-path "$working_dir" "broken_schema.json") 'md5' | Should be "0427c7f4edc33d6d336db98fc160beb0"
+        compute_hash (join-path "$working_dir" "broken_wget.json") 'md5' | Should be "30a7d4d3f64cb7a800d96c0f2ccec87f"
     }
 
     it 'computes SHA-1 correctly' {
-        compute_hash "$working_dir\\invalid_wget.json" 'sha1' | Should be "33ae44df8feed86cdc8f544234029fb28280c3c5"
-        compute_hash "$working_dir\\wget.json" 'sha1' | Should be "98bfacb887da8cd05d3a1162f89d90173294be55"
-        compute_hash "$working_dir\\broken_schema.json" 'sha1' | Should be "6dcd64f8ce7a3ae6bbc3dc2288b7cb202dbfa3c8"
-        compute_hash "$working_dir\\broken_wget.json" 'sha1' | Should be "60b5b1d5bcb4193d19aeab265eab0bb9b0c46c8f"
+        compute_hash (join-path "$working_dir" "invalid_wget.json") 'sha1' | Should be "33ae44df8feed86cdc8f544234029fb28280c3c5"
+        compute_hash (join-path "$working_dir" "wget.json") 'sha1' | Should be "98bfacb887da8cd05d3a1162f89d90173294be55"
+        compute_hash (join-path "$working_dir" "broken_schema.json") 'sha1' | Should be "6dcd64f8ce7a3ae6bbc3dc2288b7cb202dbfa3c8"
+        compute_hash (join-path "$working_dir" "broken_wget.json") 'sha1' | Should be "60b5b1d5bcb4193d19aeab265eab0bb9b0c46c8f"
     }
 
     it 'computes SHA-256 correctly' {
-        compute_hash "$working_dir\\invalid_wget.json" 'sha256' | Should be "1a92ef57c5f3cecba74015ae8e92fc3f2dbe141f9d171c3a06f98645a522d58c"
-        compute_hash "$working_dir\\wget.json" 'sha256' | Should be "31d6d0953d4e95f0a42080acd61a8c2f92bc90cae324c0d6d2301a974c15f62f"
-        compute_hash "$working_dir\\broken_schema.json" 'sha256' | Should be "f3e5082e366006c317d9426e590623254cb1ce23d4f70165afed340b03ce333b"
-        compute_hash "$working_dir\\broken_wget.json" 'sha256' | Should be "da658987c3902658c6e754bfa6546dfd084aaa2c3ae25f1fd8aa4645bc9cae24"
+        compute_hash (join-path "$working_dir" "invalid_wget.json") 'sha256' | Should be "1a92ef57c5f3cecba74015ae8e92fc3f2dbe141f9d171c3a06f98645a522d58c"
+        compute_hash (join-path "$working_dir" "wget.json") 'sha256' | Should be "31d6d0953d4e95f0a42080acd61a8c2f92bc90cae324c0d6d2301a974c15f62f"
+        compute_hash (join-path "$working_dir" "broken_schema.json") 'sha256' | Should be "f3e5082e366006c317d9426e590623254cb1ce23d4f70165afed340b03ce333b"
+        compute_hash (join-path "$working_dir" "broken_wget.json") 'sha256' | Should be "da658987c3902658c6e754bfa6546dfd084aaa2c3ae25f1fd8aa4645bc9cae24"
     }
 
     it 'computes SHA-512 correctly' {
-        compute_hash "$working_dir\\invalid_wget.json" 'sha512' | Should be "7a7b82ec17547f5ec13dc614a8cec919e897e6c344a6ce7d71205d6f1c3aed276c7b15cbc69acac8207f72417993299cef36884e1915d56758ea09efa2259870"
-        compute_hash "$working_dir\\wget.json" 'sha512' | Should be "216ebf07bb77062b51420f0f5eb6b7a94d9623d1d41d36c833436058f41e39898f2aa48d7020711c0d8765d02b87ac2e6810f3f502636a6e6f47dc4b9aa02d17"
-        compute_hash "$working_dir\\broken_schema.json" 'sha512' | Should be "8d3f5617517e61c33275eafea4b166f0a245ec229c40dea436173c354786bad72e4fd9d662f6ac2b9f3dd375c00815a07f10e12975eec1b12da7ba7db10f9c14"
-        compute_hash "$working_dir\\broken_wget.json" 'sha512' | Should be "7b16a714491e91cc6daa5f90e700547fac4d62e1fcec8c4b78f5a2386e04e68a8ed68f27503ece9555904a047df8050b3f12b4f779c05b1e4d0156e6e2d8fdbb"
+        compute_hash (join-path "$working_dir" "invalid_wget.json") 'sha512' | Should be "7a7b82ec17547f5ec13dc614a8cec919e897e6c344a6ce7d71205d6f1c3aed276c7b15cbc69acac8207f72417993299cef36884e1915d56758ea09efa2259870"
+        compute_hash (join-path "$working_dir" "wget.json") 'sha512' | Should be "216ebf07bb77062b51420f0f5eb6b7a94d9623d1d41d36c833436058f41e39898f2aa48d7020711c0d8765d02b87ac2e6810f3f502636a6e6f47dc4b9aa02d17"
+        compute_hash (join-path "$working_dir" "broken_schema.json") 'sha512' | Should be "8d3f5617517e61c33275eafea4b166f0a245ec229c40dea436173c354786bad72e4fd9d662f6ac2b9f3dd375c00815a07f10e12975eec1b12da7ba7db10f9c14"
+        compute_hash (join-path "$working_dir" "broken_wget.json") 'sha512' | Should be "7b16a714491e91cc6daa5f90e700547fac4d62e1fcec8c4b78f5a2386e04e68a8ed68f27503ece9555904a047df8050b3f12b4f779c05b1e4d0156e6e2d8fdbb"
     }
 }