1 files changed, 38 insertions, 0 deletions
diff --git a/Tests/NorgUITests/OrdinalTests.swift b/Tests/NorgUITests/OrdinalTests.swift
new file mode 100644
index 0000000..954477c
--- /dev/null
+++ b/Tests/NorgUITests/OrdinalTests.swift
@@ -0,0 +1,38 @@
+import NorgKit
+import Testing
+
+@testable import NorgUI
+
+@Suite struct OrdinalTests {
+  private func ordered(_ level: Int) -> NorgBlock {
+    .orderedListItem(level: level, status: nil, content: [], line: 0)
+  }
+  private func unordered(_ level: Int) -> NorgBlock {
+    .unorderedListItem(level: level, status: nil, content: [], line: 0)
+  }
+  private var paragraph: NorgBlock { .paragraph(content: [], line: 0) }
+
+  @Test func numbersConsecutiveItems() {
+    #expect(orderedOrdinals([ordered(1), ordered(1), ordered(1)]) == [1, 2, 3])
+  }
+
+  @Test func countsEachLevelIndependently() {
+    let blocks = [ordered(1), ordered(2), ordered(2), ordered(1)]
+    #expect(orderedOrdinals(blocks) == [1, 1, 2, 2])
+  }
+
+  @Test func paragraphResetsNumbering() {
+    let blocks = [ordered(1), paragraph, ordered(1)]
+    #expect(orderedOrdinals(blocks) == [1, nil, 1])
+  }
+
+  @Test func unorderedItemInterruptsNumbering() {
+    let blocks = [ordered(1), unordered(1), ordered(1)]
+    #expect(orderedOrdinals(blocks) == [1, nil, 1])
+  }
+
+  @Test func siblingOrdinalsNumberOrderedNodesOnly() {
+    let nodes = [ordered(1), unordered(1), ordered(1), paragraph].map { NorgNode(block: $0) }
+    #expect(ordinals(forSiblings: nodes) == [1, nil, 2, nil])
+  }
+}