tests

square · Dec 9, 2020 · d4c534d · d4c534d
1 parent fb694ec
commit d4c534d
Showing 1 changed file with 61 additions and 0 deletions.
diff --git a/BlueprintUI/Tests/LayoutWriterTests.swift b/BlueprintUI/Tests/LayoutWriterTests.swift
@@ -11,5 +11,66 @@ import XCTest
 
 class LayoutWriterTests : XCTestCase {
 
+    func test_measurement() {
+
+        /// `.unionOfChildren`
+
+        do {
+            let writer = LayoutWriter { context, layout in
+                layout.add(with: CGRect(x: 10, y: 20, width: 50, height: 50), child: TestElement())
+                layout.add(with: CGRect(x: 20, y: 10, width: 20, height: 100), child: TestElement())
+
+                layout.sizing = .unionOfChildren
+            }
+
+            XCTAssertEqual(writer.content.measure(in: .unconstrained), CGSize(width: 60, height: 110))
+        }
+
+
+        /// `.fixed`
+
+        do {
+            let writer = LayoutWriter { context, layout in
+                layout.add(with: CGRect(x: 10, y: 20, width: 50, height: 50), child: TestElement())
+
+                layout.sizing = .fixed(CGSize(width: 100, height: 100))
+            }
+
+            XCTAssertEqual(writer.content.measure(in: .unconstrained), CGSize(width: 100, height: 100))
+        }
+
+    }
+
+    func test_layout() {
+        let writer = LayoutWriter { context, layout in
+            layout.add(with: CGRect(x: 10, y: 20, width: 50, height: 50), child: TestElement())
+            layout.add(with: CGRect(x: 20, y: 10, width: 20, height: 100), child: TestElement())
+        }
+
+        let layoutResult = writer.content.performLayout(attributes: LayoutAttributes(size: CGSize(width: 100, height: 100)), environment: .empty)
+        let innerElement = layoutResult[0]
+
+        let nodes = innerElement.node.children.map(\.node)
+
+        XCTAssertEqual(nodes.count, 2)
+
+        let first = nodes[0]
+        let second = nodes[1]
+
+        XCTAssertEqual(first.layoutAttributes.frame, CGRect(x: 10, y: 20, width: 50, height: 50))
+        XCTAssertEqual(second.layoutAttributes.frame, CGRect(x: 20, y: 10, width: 20, height: 100))
+    }
+}
+
+
+fileprivate struct TestElement : Element {
+
+    var content: ElementContent {
+        ElementContent { $0.maximum }
+    }
+
+    func backingViewDescription(bounds: CGRect, subtreeExtent: CGRect?) -> ViewDescription? {
+        UIView.describe { _ in }
+    }
 
 }