diff --git a/Tests/FlowTests/LineBreakingTests.swift b/Tests/FlowTests/LineBreakingTests.swift
new file mode 100644
index 00000000..264d20d8
--- /dev/null
+++ b/Tests/FlowTests/LineBreakingTests.swift
@@ -0,0 +1,34 @@
+import XCTest
+@testable import Flow
+
+final class LineBreakingTests: XCTestCase {
+    func test_flow() throws {
+        // Given
+        let sut = FlowLineBreaker()
+
+        // When
+        let breakpoints = sut.wrapItemsToLines(
+            sizes: [10, 20, 30, 40, 20, 30],
+            spacings: [0, 10, 10, 10, 10, 10],
+            in: 80
+        )
+
+        // Then
+        XCTAssertEqual(breakpoints, [0, 3, 5, 6])
+    }
+
+    func test_knuth_plass() throws {
+        // Given
+        let sut = KnuthPlassLineBreaker()
+
+        // When
+        let breakpoints = sut.wrapItemsToLines(
+            sizes: [10, 20, 30, 40, 20, 30],
+            spacings: [0, 10, 10, 10, 10, 10],
+            in: 80
+        )
+
+        // Then
+        XCTAssertEqual(breakpoints, [0, 3, 4, 6])
+    }
+}