Update unit tests

Author: cpisciotta

Tests/XcbeautifyLibTests/RendererTests/GitHubActionsRendererTests.swift

@@ -2,15 +2,21 @@ import XCTest
 @testable import XcbeautifyLib
 
 final class GitHubActionsRendererTests: XCTestCase {
-    var parser: Parser!
-    var formatter: XcbeautifyLib.Formatter!
+    private var parser: Parser!
+    private var formatter: XcbeautifyLib.Formatter!
 
     override func setUpWithError() throws {
         try super.setUpWithError()
         parser = Parser()
         formatter = Formatter(colored: false, renderer: .gitHubActions, additionalLines: { nil })
     }
 
+    override func tearDownWithError() throws {
+        parser = nil
+        formatter = nil
+        try super.tearDownWithError()
+    }
+
     private func logFormatted(_ string: String) -> String? {
         guard let captureGroup = parser.parse(line: string) else { return nil }
         return formatter.format(captureGroup: captureGroup)

Tests/XcbeautifyLibTests/RendererTests/TeamCityRendererTests.swift

@@ -2,15 +2,21 @@ import XCTest
 @testable import XcbeautifyLib
 
 final class TeamCityRendererTests: XCTestCase {
-    var parser: Parser!
-    var formatter: XcbeautifyLib.Formatter!
+    private var parser: Parser!
+    private var formatter: XcbeautifyLib.Formatter!
 
     override func setUpWithError() throws {
         try super.setUpWithError()
         parser = Parser()
         formatter = Formatter(colored: false, renderer: .teamcity, additionalLines: { nil })
     }
 
+    override func tearDownWithError() throws {
+        parser = nil
+        formatter = nil
+        try super.tearDownWithError()
+    }
+
     private func noColoredFormatted(_ string: String) -> String? {
         guard let captureGroup = parser.parse(line: string) else { return nil }
         return formatter.format(captureGroup: captureGroup)

Tests/XcbeautifyLibTests/RendererTests/TerminalRendererTests.swift

@@ -2,15 +2,21 @@ import XCTest
 @testable import XcbeautifyLib
 
 final class TerminalRendererTests: XCTestCase {
-    var parser: Parser!
-    var formatter: XcbeautifyLib.Formatter!
+    private var parser: Parser!
+    private var formatter: XcbeautifyLib.Formatter!
 
     override func setUpWithError() throws {
         try super.setUpWithError()
         parser = Parser()
         formatter = Formatter(colored: false, renderer: .terminal, additionalLines: { nil })
     }
 
+    override func tearDownWithError() throws {
+        parser = nil
+        formatter = nil
+        try super.tearDownWithError()
+    }
+
     private func noColoredFormatted(_ string: String) -> String? {
         guard let captureGroup = parser.parse(line: string) else { return nil }
         return formatter.format(captureGroup: captureGroup)