From fb8fb79fbf56fbb0559ff7131334c3a0551b7827 Mon Sep 17 00:00:00 2001
From: Christopher Fuller <christopher.fuller@gotinder.com>
Date: Tue, 20 Feb 2024 20:29:35 -0800
Subject: [PATCH] Add multiplier argument to NSLayoutDimension

---
 Sources/Layout/UIKit/NSLayoutDimension.swift  |  9 +++---
 .../UIKit/NSLayoutDimensionTests.swift        | 29 ++++++++++++++++---
 2 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/Sources/Layout/UIKit/NSLayoutDimension.swift b/Sources/Layout/UIKit/NSLayoutDimension.swift
index 86a3fc78..6ee9eba9 100644
--- a/Sources/Layout/UIKit/NSLayoutDimension.swift
+++ b/Sources/Layout/UIKit/NSLayoutDimension.swift
@@ -24,17 +24,18 @@ extension NSLayoutDimension {
     public func constraint(
         is relation: NSLayoutConstraint.Relation = .equal,
         to anchor: NSLayoutDimension,
+        multiplier: CGFloat = 1,
         constant: CGFloat = 0
     ) -> NSLayoutConstraint {
         switch relation {
         case .equal:
-            return constraint(equalTo: anchor, constant: constant)
+            return constraint(equalTo: anchor, multiplier: multiplier, constant: constant)
         case .greaterThanOrEqual:
-            return constraint(greaterThanOrEqualTo: anchor, constant: constant)
+            return constraint(greaterThanOrEqualTo: anchor, multiplier: multiplier, constant: constant)
         case .lessThanOrEqual:
-            return constraint(lessThanOrEqualTo: anchor, constant: constant)
+            return constraint(lessThanOrEqualTo: anchor, multiplier: multiplier, constant: constant)
         @unknown default:
-            return constraint(equalTo: anchor, constant: constant)
+            return constraint(equalTo: anchor, multiplier: multiplier, constant: constant)
         }
     }
 
diff --git a/Tests/LayoutTests/UIKit/NSLayoutDimensionTests.swift b/Tests/LayoutTests/UIKit/NSLayoutDimensionTests.swift
index 8fe5daec..a93e168e 100644
--- a/Tests/LayoutTests/UIKit/NSLayoutDimensionTests.swift
+++ b/Tests/LayoutTests/UIKit/NSLayoutDimensionTests.swift
@@ -14,7 +14,7 @@ import XCTest
 @MainActor
 final class NSLayoutDimensionTests: XCTestCase {
 
-    func testConstraintIsRelationToAnchorConstant_givenDefaults() {
+    func testConstraintIsRelationToAnchorMultiplierConstant_givenDefaults() {
 
         // GIVEN
 
@@ -35,7 +35,28 @@ final class NSLayoutDimensionTests: XCTestCase {
         expect(constraint).to(match(expected))
     }
 
-    func testConstraintIsRelationToAnchorConstant_givenConstant() {
+    func testConstraintIsRelationToAnchorMultiplierConstant_givenMultiplier() {
+
+        // GIVEN
+
+        let viewA: UIView = .init()
+        let viewB: UIView = .init()
+        let expected: NSLayoutConstraint = viewA
+            .width
+            .constraint(equalTo: viewB.width, multiplier: 23)
+
+        // WHEN
+
+        let constraint: NSLayoutConstraint = viewA
+            .width
+            .constraint(to: viewB.width, multiplier: 23)
+
+        // THEN
+
+        expect(constraint).to(match(expected))
+    }
+
+    func testConstraintIsRelationToAnchorMultiplierConstant_givenConstant() {
 
         // GIVEN
 
@@ -56,7 +77,7 @@ final class NSLayoutDimensionTests: XCTestCase {
         expect(constraint).to(match(expected))
     }
 
-    func testConstraintIsRelationToAnchorConstant_givenGreaterThanOrEqualRelation() {
+    func testConstraintIsRelationToAnchorMultiplierConstant_givenGreaterThanOrEqualRelation() {
 
         // GIVEN
 
@@ -77,7 +98,7 @@ final class NSLayoutDimensionTests: XCTestCase {
         expect(constraint).to(match(expected))
     }
 
-    func testConstraintIsRelationToAnchorConstant_givenLessThanOrEqualRelation() {
+    func testConstraintIsRelationToAnchorMultiplierConstant_givenLessThanOrEqualRelation() {
 
         // GIVEN