diff --git a/src/test/kotlin/net/shadowfacts/shadowui/WindowTests.kt b/src/test/kotlin/net/shadowfacts/shadowui/WindowTests.kt
new file mode 100644
index 0000000..34e7b55
--- /dev/null
+++ b/src/test/kotlin/net/shadowfacts/shadowui/WindowTests.kt
@@ -0,0 +1,81 @@
+package net.shadowfacts.shadowui
+
+import net.shadowfacts.kiwidsl.dsl
+import net.shadowfacts.shadowui.geometry.Size
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+/**
+ * @author shadowfacts
+ */
+class WindowTests {
+
+	lateinit var window: Window
+
+	@BeforeEach
+	fun setup() {
+		window = Window()
+	}
+
+	@Test
+	fun testConstraintToConstant() {
+		val view = window.addView(View())
+		window.solver.dsl {
+			view.leftAnchor equalTo 100
+			view.rightAnchor equalTo 200
+
+			view.topAnchor equalTo 100
+			view.heightAnchor equalTo 200
+		}
+		window.layout()
+
+		assertEquals(100.0, view.widthAnchor.value)
+		assertEquals(300.0, view.bottomAnchor.value)
+	}
+
+	@Test
+	fun testConstraintToView() {
+		val one = window.addView(View())
+		val two = window.addView(View())
+		window.solver.dsl {
+			one.leftAnchor equalTo 0
+			one.widthAnchor equalTo 100
+
+			one.topAnchor equalTo 0
+			one.heightAnchor equalTo 200
+
+			two.leftAnchor equalTo one.rightAnchor
+			two.rightAnchor equalTo 400
+
+			two.topAnchor equalTo one.bottomAnchor
+			two.heightAnchor equalTo one.heightAnchor
+		}
+		window.layout()
+
+		assertEquals(100.0, two.leftAnchor.value)
+		assertEquals(300.0, two.widthAnchor.value)
+
+		assertEquals(200.0, two.topAnchor.value)
+		assertEquals(400.0, two.bottomAnchor.value)
+	}
+
+	@Test
+	fun testIntrinsicContentSize() {
+		val view = window.addView(View()).apply {
+			intrinsicContentSize = Size(100.0, 200.0)
+		}
+		window.solver.dsl {
+			view.leftAnchor equalTo 0
+			view.topAnchor equalTo 100
+		}
+		window.layout()
+
+		assertEquals(100.0, view.widthAnchor.value)
+		assertEquals(100.0, view.rightAnchor.value)
+
+		assertEquals(200.0, view.heightAnchor.value)
+		assertEquals(300.0, view.bottomAnchor.value)
+	}
+
+}
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