[CM-995] Add new linter rules and fix warnings

.swiftlint.yml

@@ -9,6 +9,8 @@ opt_in_rules: # some rules are turned off by default, so you need to opt-in
   - empty_count
   - first_where
   - force_unwrapping
+  - implicit_return
+  - missing_docs
   - multiline_arguments
   - multiline_arguments_brackets
   - multiline_function_chains

Sources/YCoreUI/Extensions/UIKit/UIColor+rgbComponents.swift

@@ -8,6 +8,10 @@
 
 import UIKit
 
+// This relatively simple tuple (four float values representing the color channels)
+// is already a released public api.
+// swiftlint: disable large_tuple
+
 /// Tuple representing Red, Green, Blue, and Alpha color channel components
 public typealias RGBAComponents = (red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat)
 

Sources/YCoreUI/Extensions/UIKit/UIView+constrainEdges.swift

@@ -10,22 +10,22 @@ import UIKit
 
 extension NSDirectionalRectEdge {
     /// Horizontal edges only (consisting of `.leading` and `.trailing`)
-    public static var horizontal: NSDirectionalRectEdge { return [.leading, .trailing] }
+    public static var horizontal: NSDirectionalRectEdge { [.leading, .trailing] }
 
     /// Vertical edges only (consisting of `.top` and `.bottom`)
-    public static var vertical: NSDirectionalRectEdge { return [.top, .bottom] }
+    public static var vertical: NSDirectionalRectEdge { [.top, .bottom] }
 
     /// All edges except `.top`
-    public static var notTop: NSDirectionalRectEdge { return [.leading, .bottom, .trailing] }
+    public static var notTop: NSDirectionalRectEdge { [.leading, .bottom, .trailing] }
 
     /// All edges except `.leading`
-    public static var notLeading: NSDirectionalRectEdge { return [.top, .bottom, .trailing] }
+    public static var notLeading: NSDirectionalRectEdge { [.top, .bottom, .trailing] }
 
     /// All edges except `.bottom`
-    public static var notBottom: NSDirectionalRectEdge { return [.top, .leading, .trailing] }
+    public static var notBottom: NSDirectionalRectEdge { [.top, .leading, .trailing] }
 
     /// All edges except `.trailing`
-    public static var notTrailing: NSDirectionalRectEdge { return [.top, .leading, .bottom] }
+    public static var notTrailing: NSDirectionalRectEdge { [.top, .leading, .bottom] }
 }
 
 extension UIView {

Tests/YCoreUITests/Extensions/Foundation/CGFloat+roundedTests.swift

@@ -9,6 +9,9 @@
 import XCTest
 @testable import YCoreUI
 
+// Large tuples help us build unit test expectations concisely
+// swiftlint:disable large_tuple
+
 final class CGFloatRoundedTests: XCTestCase {
     typealias ScalingInputs = (
         value: CGFloat,

Tests/YCoreUITests/Extensions/UIKit/UIColor+WCAGTests.swift

@@ -9,6 +9,9 @@
 import XCTest
 @testable import YCoreUI
 
+// Large tuples help us build unit test expectations concisely
+// swiftlint:disable large_tuple
+
 final class UIColorWCAGTests: XCTestCase {
     typealias ColorInputs = (foreground: UIColor, background: UIColor, context: WCAGContext)
 

Tests/YCoreUITests/Extensions/UIKit/UIColor+rgbValueTests.swift

@@ -8,6 +8,9 @@
 
 import XCTest
 
+// Large tuples help us build unit test expectations concisely
+// swiftlint:disable large_tuple
+
 final class UIColorRgbValueTests: XCTestCase {
     typealias ColorTest = (color: UIColor, prefix: String?, isUppercase: Bool, output: String)
 

Tests/YCoreUITests/Extensions/UIKit/UIView+constrainAnchorTests.swift

@@ -9,9 +9,6 @@
 import XCTest
 @testable import YCoreUI
 
-// It's not a problem having too many tests!
-// swiftlint:disable type_body_length
-
 final class UIViewConstrainAnchorTests: XCTestCase {
     func testXAxisConstraints() {
         let (sut, relations) = makeSUT()

Tests/YCoreUITests/Extensions/UIKit/UIView+constrainEdgesTests.swift

@@ -8,9 +8,6 @@
 
 import XCTest
 
-// It's not a problem having too many tests!
-// swiftlint:disable function_body_length
-
 final class UIViewConstrainEdgesTests: XCTestCase {
     func testSimple() {
         let (sut, insets) = makeSUT()

Tests/YCoreUITests/Foundations/UIColor+TestHarness.swift

@@ -46,9 +46,6 @@ extension UIColor {
 }
 
 extension UIColor {
-    /// 0x0067B1
-    static let brand = UIColor(rgb: 0x0067B1)
-
     /// 0x0050AC
     static let interactive = UIColor(rgb: 0x0050AC)
 
@@ -57,9 +54,6 @@ extension UIColor {
 
     /// 0xE7F3FE
     static let shade2 = UIColor(rgb: 0xE7F3FE)
-
-    /// 0x6390BC
-    static let shade3 = UIColor(rgb: 0x6390BC)
 }
 
 extension UIColor {
@@ -113,17 +107,6 @@ extension UIColor {
             }
         }
 
-    static let separatorSecondary: UIColor =
-        UIColor { (traitCollection: UITraitCollection) -> UIColor in
-            switch(traitCollection.userInterfaceStyle,
-                   traitCollection.accessibilityContrast) {
-            case (.dark, .high):    return .gray600
-            case (.dark, _):        return .gray500
-            case (_, .high):        return .gray600
-            default:                return .white
-            }
-        }
-
     static let backgroundPrimaryCTA: UIColor =
         UIColor { (traitCollection: UITraitCollection) -> UIColor in
             switch(traitCollection.userInterfaceStyle,
@@ -143,17 +126,4 @@ extension UIColor {
             default:                return .white
             }
         }
-
-    static let backgroundAccent: UIColor =
-        UIColor { (traitCollection: UITraitCollection) -> UIColor in
-            switch(traitCollection.userInterfaceStyle,
-                   traitCollection.accessibilityContrast) {
-            case (.dark, .high):    return .gray400
-            case (.dark, _):        return .gray300
-            case (_, .high):        return .accent.darkened(by: 0.25)
-            default:                return .accent
-            }
-        }
-
-    public static let contentAccent: UIColor = .white
 }