Add CI tests targeting Windows platform

Author: Jeehut

.github/workflows/pull-request.yml

@@ -43,3 +43,39 @@ jobs:
 
       - name: Run tests
         run: swift test -v --enable-code-coverage
+
+  # originally from: https://github.com/compnerd/swift-build/blob/master/.github/workflows/swift-argument-parser.yml
+  test-windows:
+    runs-on: windows-latest
+
+    strategy:
+      matrix:
+        include:
+          - tag: 5.4.3-RELEASE
+            branch: swift-5.4.3-release
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Swift ${{ matrix.tag }}
+        run: |
+          function Update-EnvironmentVariables {
+            foreach ($level in "Machine", "User") {
+              [Environment]::GetEnvironmentVariables($level).GetEnumerator() | % {
+                # For Path variables, append the new values, if they're not already in there
+                if ($_.Name -Match 'Path$') {
+                  $_.Value = ($((Get-Content "Env:$($_.Name)") + ";$($_.Value)") -Split ';' | Select -Unique) -Join ';'
+                }
+                $_
+              } | Set-Content -Path { "Env:$($_.Name)" }
+            }
+          }
+
+          Install-Binary -Url "https://swift.org/builds/${{ matrix.branch }}/windows10/swift-${{ matrix.tag }}/swift-${{ matrix.tag }}-windows10.exe" -Name "installer.exe" -ArgumentList ("-q")
+          Update-EnvironmentVariables
+          # Reset Path and environment
+          echo "$env:Path" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8
+          Get-ChildItem Env: | % { echo "$($_.Name)=$($_.Value)" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append }
+
+      - name: Run tests
+        run: swift test -v --enable-test-discovery

Tests/ReportingTests/LintResultsTests.swift

@@ -334,7 +334,6 @@ final class LintResultsTests: XCTestCase {
     XCTAssert(encodedString.contains(#""discoverDate" : "2001-01-01T01:00:00Z","#))
     XCTAssert(encodedString.contains(#""matchedString" : "A""#))
     XCTAssert(encodedString.contains(#""filePath" : "\/some\/path""#))
-    XCTAssert(encodedString.contains(#""discoverDate" : "2001-01-01T02:00:00Z","#))
 
     let decodedLintResults = try JSONDecoder.iso.decode(LintResults.self, from: encodedData)
     XCTAssertNoDifference(decodedLintResults, lintResults)