Initial Commit

Tests/TextualAutoLayoutTests/TextualAutoLayoutTests.swift

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+import XCTest
+@testable import TextualAutoLayout
+
+final class TextualAutoLayoutTests: XCTestCase {
+	var parent, A, B: ConstraintView!
+	
+	override func setUp() {
+		parent = ConstraintView()
+		A = ConstraintView()
+		B = ConstraintView()
+		parent.addSubview(A)
+		parent.addSubview(B)
+	}
+	
+    func testBasic() {
+		let x = A.bottomAnchor =&= B.topAnchor + 20.3 | .defaultLow
+		XCTAssertEqual(x.relation, NSLayoutConstraint.Relation.equal)
+		XCTAssertEqual(x.priority, ConstraintPriority.defaultLow)
+		XCTAssertEqual(x.constant, 20.3)
+		XCTAssertEqual(x.isActive, true)
+    }
+	
+	func testDimensional() {
+		let x = A.heightAnchor =<= 2 * B.widthAnchor - 4
+		XCTAssertEqual(x.relation, NSLayoutConstraint.Relation.lessThanOrEqual)
+		XCTAssertEqual(x.priority, ConstraintPriority.required)
+		XCTAssertEqual(x.multiplier, 2)
+		XCTAssertEqual(x.constant, -4)
+		XCTAssertEqual(x.isActive, true)
+		
+		XCTAssertEqual((A.widthAnchor =>= 2 * A.heightAnchor).constant, 0)
+		XCTAssertEqual((A.widthAnchor =<= 250).constant, 250)
+	}
+	
+	func testIntrinsicContent() {
+		A.constrainHuggingCompression(.vertical, .required)
+		// newly set values
+		XCTAssertEqual(A.contentCompressionResistancePriority(for: .vertical), ConstraintPriority.required)
+		XCTAssertEqual(A.contentHuggingPriority(for: .vertical), ConstraintPriority.required)
+		// default values
+		XCTAssertEqual(A.contentCompressionResistancePriority(for: .horizontal), ConstraintPriority.defaultHigh)
+		XCTAssertEqual(A.contentHuggingPriority(for: .horizontal), ConstraintPriority.defaultLow)
+	}
+	
+	func testReturnConstraint() {
+		XCTAssertEqual((A.rightAnchor =&= B.leftAnchor).firstItem as? ConstraintView, A)
+	}
+	
+	func testViewMultiConstraint() {
+		A.anchor([.left, .right, .top], to: parent!, padding: 76) | .defaultHigh
+		let x = parent.constraints
+		XCTAssertEqual(x.count, 3)
+		XCTAssertEqual(A.translatesAutoresizingMaskIntoConstraints, false)
+		XCTAssertEqual(parent.translatesAutoresizingMaskIntoConstraints, true)
+		
+		for u in x {
+			XCTAssertEqual(u.relation, NSLayoutConstraint.Relation.equal)
+			XCTAssertEqual(u.priority, ConstraintPriority.defaultHigh)
+			XCTAssertEqual(u.constant, 76)
+			XCTAssertEqual(u.firstAttribute, u.secondAttribute)
+			XCTAssertEqual(u.isActive, true)
+			
+			let first = u.firstItem as? ConstraintView
+			let second = u.secondItem as? ConstraintView
+			if u.firstAttribute == .right {
+				XCTAssertEqual(first, parent)
+				XCTAssertEqual(second, A)
+			} else {
+				XCTAssertEqual(first, A)
+				XCTAssertEqual(second, parent)
+			}
+		}
+		x.setActive(false)
+		for u in x { XCTAssertEqual(u.isActive, false) }
+	}
+}