Add tests to verify hairline config works properly after changes

Example/Tests/StackableTests.swift

@@ -0,0 +1,48 @@
+//
+// StackableTests.swift
+// 
+//
+// Created by Jonathan Cole on 12/1/21.
+//
+
+@testable import Stackable
+import XCTest
+
+class StackableTests: XCTestCase {
+
+ func testHairlineConfigLogic() {
+ // Test Global config
+ UIStackView.stackable.hairlineColor = .blue
+ let stack1 = UIStackView()
+ stack1.stackable.add([
+ UIStackView.stackable.hairline,
+ ])
+ let hairline1 = stack1.arrangedSubviews.first as! StackableHairlineView
+ XCTAssert(hairline1.backgroundColor == .blue)
+
+ // Test instance config
+ let stack2 = UIStackView()
+ stack2.stackable.hairlineColor = .brown
+ stack2.stackable.add([
+ UIStackView.stackable.hairline,
+ ])
+ let hairline2 = stack2.arrangedSubviews.first as! StackableHairlineView
+ XCTAssert(hairline2.backgroundColor == .brown)
+
+ // Test per-hairline Config
+ let stack3 = UIStackView()
+ stack3.stackable.hairlineColor = .brown
+ stack3.stackable.add([
+ UIStackView.stackable.hairline,
+ UIStackView.stackable.hairline
+ .color(.yellow),
+ ])
+ let hairline3 = stack3.arrangedSubviews.first as! StackableHairlineView
+ XCTAssert(hairline3.backgroundColor == .brown)
+
+ let hairline4 = stack3.arrangedSubviews.last as! StackableHairlineView
+ XCTAssert(hairline4.backgroundColor == .yellow)
+
+ }
+
+}