Run tests on Xcode 12 as well

Tests/SwiftLintFrameworkTests/IndentationWidthRuleTests.swift

@@ -175,7 +175,7 @@ class IndentationWidthRuleTests: XCTestCase {
         if let includeComments = includeComments { configDict["include_comments"] = includeComments }
 
         guard let config = makeConfig(configDict, IndentationWidthRule.description.identifier) else {
-            XCTFail("Unable to create rule configuration.", file: file, line: line)
+            XCTFail("Unable to create rule configuration.", file: (file), line: line)
             return 0
         }
 
@@ -192,14 +192,14 @@ class IndentationWidthRuleTests: XCTestCase {
     ) {
         XCTAssertEqual(
             countViolations(
-                in: Example(string, file: file, line: line),
+                in: Example(string, file: (file), line: line),
                 indentationWidth: indentationWidth,
                 includeComments: includeComments,
                 file: file,
                 line: line
             ),
             expectedCount,
-            file: file,
+            file: (file),
             line: line
         )
     }

Tests/SwiftLintFrameworkTests/LinterCacheTests.swift

@@ -78,7 +78,7 @@ class LinterCacheTests: XCTestCase {
         cache.cache(violations: violations, forFile: forFile, configuration: configuration)
         cache = cache.flushed()
         XCTAssertEqual(cache.violations(forFile: forFile, configuration: configuration)!,
-                       violations, file: file, line: line)
+                       violations, file: (file), line: line)
     }
 
     private func cacheAndValidateNoViolationsTwoFiles(configuration: Configuration,
@@ -97,11 +97,11 @@ class LinterCacheTests: XCTestCase {
         let newConfig = Configuration(dict: dict)!
         let (file1, file2) = ("file1.swift", "file2.swift")
 
-        XCTAssertNil(cache.violations(forFile: file1, configuration: newConfig), file: file, line: line)
+        XCTAssertNil(cache.violations(forFile: file1, configuration: newConfig), file: (file), line: line)
-        XCTAssertNil(cache.violations(forFile: file2, configuration: newConfig), file: file, line: line)
+        XCTAssertNil(cache.violations(forFile: file2, configuration: newConfig), file: (file), line: line)
 
-        XCTAssertEqual(cache.violations(forFile: file1, configuration: initialConfig)!, [], file: file, line: line)
+        XCTAssertEqual(cache.violations(forFile: file1, configuration: initialConfig)!, [], file: (file), line: line)
-        XCTAssertEqual(cache.violations(forFile: file2, configuration: initialConfig)!, [], file: file, line: line)
+        XCTAssertEqual(cache.violations(forFile: file2, configuration: initialConfig)!, [], file: (file), line: line)
     }
 
     // MARK: Cache Reuse

Tests/SwiftLintFrameworkTests/SwiftVersionTests.swift

@@ -4,7 +4,9 @@ import XCTest
 final class SwiftVersionTests: XCTestCase {
     // swiftlint:disable:next function_body_length
     func testDetectSwiftVersion() {
-        #if compiler(>=5.2.4)
+        #if compiler(>=5.3.0)
+            let version = "5.3.0"
+        #elseif compiler(>=5.2.4)
             let version = "5.2.4"
         #elseif compiler(>=5.2.3)
             let version = "5.2.3"

Tests/SwiftLintFrameworkTests/TestHelpers.swift

@@ -285,7 +285,7 @@ extension XCTestCase {
             ruleConfiguration,
             ruleDescription.identifier,
             skipDisableCommandTests: skipDisableCommandTests) else {
-                XCTFail("Failed to create configuration", file: file, line: line)
+                XCTFail("Failed to create configuration", file: (file), line: line)
                 return
         }
 
@@ -342,7 +342,7 @@ extension XCTestCase {
             XCTAssertEqual(
                 triggers.flatMap({ makeViolations($0.with(code: "/*\n  " + $0.code + "\n */")) }).count,
                 commentDoesntViolate ? 0 : triggers.count,
-                file: file, line: line
+                file: (file), line: line
             )
         }
 
@@ -351,14 +351,14 @@ extension XCTestCase {
             XCTAssertEqual(
                 triggers.flatMap({ makeViolations($0.with(code: $0.code.toStringLiteral())) }).count,
                 stringDoesntViolate ? 0 : triggers.count,
-                file: file, line: line
+                file: (file), line: line
             )
         }
 
         // "disable" commands doesn't violate
         for command in disableCommands {
             XCTAssert(triggers.flatMap({ makeViolations($0.with(code: command + $0.code)) }).isEmpty,
-                      file: file, line: line)
+                      file: (file), line: line)
         }
     }
 
@@ -460,13 +460,13 @@ extension XCTestCase {
         closure: () throws -> Void) {
         do {
             try closure()
-            XCTFail("No error caught", file: file, line: line)
+            XCTFail("No error caught", file: (file), line: line)
         } catch let rError as T {
             if error != rError {
-                XCTFail("Wrong error caught. Got \(rError) but was expecting \(error)", file: file, line: line)
+                XCTFail("Wrong error caught. Got \(rError) but was expecting \(error)", file: (file), line: line)
             }
         } catch {
-            XCTFail("Wrong error caught", file: file, line: line)
+            XCTFail("Wrong error caught", file: (file), line: line)
         }
     }
 }

azure-pipelines.yml

@@ -33,6 +33,8 @@ jobs:
         DEVELOPER_DIR: /Applications/Xcode_11.3.1.app
       xcode114:
         DEVELOPER_DIR: /Applications/Xcode_11.4.app
+      xcode12:
+        DEVELOPER_DIR: /Applications/Xcode_12_beta.app
   steps:
     - script: git submodule update --init --recursive
       displayName: Update git submodules
@@ -67,6 +69,8 @@ jobs:
         DEVELOPER_DIR: /Applications/Xcode_11.3.1.app
       xcode114:
         DEVELOPER_DIR: /Applications/Xcode_11.4.app
+      xcode12:
+        DEVELOPER_DIR: /Applications/Xcode_12_beta.app
   steps:
     - script: |
         sw_vers