From 87b803790c10dde62cbc5452014c619eced5b36b Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Tue, 11 Mar 2025 18:45:45 +0000
Subject: [PATCH] fix(mermaid): themechange detector + expand simplification

---
 quartz/util/path.test.ts |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/quartz/util/path.test.ts b/quartz/util/path.test.ts
index 7e9c4c8..29d845d 100644
--- a/quartz/util/path.test.ts
+++ b/quartz/util/path.test.ts
@@ -158,6 +158,29 @@
       path.isRelativeURL,
     )
   })
+
+  test("joinSegments", () => {
+    assert.strictEqual(path.joinSegments("a", "b"), "a/b")
+    assert.strictEqual(path.joinSegments("a/", "b"), "a/b")
+    assert.strictEqual(path.joinSegments("a", "b/"), "a/b/")
+    assert.strictEqual(path.joinSegments("a/", "b/"), "a/b/")
+
+    // preserve leading and trailing slashes
+    assert.strictEqual(path.joinSegments("/a", "b"), "/a/b")
+    assert.strictEqual(path.joinSegments("/a/", "b"), "/a/b")
+    assert.strictEqual(path.joinSegments("/a", "b/"), "/a/b/")
+    assert.strictEqual(path.joinSegments("/a/", "b/"), "/a/b/")
+
+    // lone slash
+    assert.strictEqual(path.joinSegments("/a/", "b", "/"), "/a/b/")
+    assert.strictEqual(path.joinSegments("a/", "b" + "/"), "a/b/")
+
+    // works with protocol specifiers
+    assert.strictEqual(path.joinSegments("https://example.com", "a"), "https://example.com/a")
+    assert.strictEqual(path.joinSegments("https://example.com/", "a"), "https://example.com/a")
+    assert.strictEqual(path.joinSegments("https://example.com", "a/"), "https://example.com/a/")
+    assert.strictEqual(path.joinSegments("https://example.com/", "a/"), "https://example.com/a/")
+  })
 })
 
 describe("link strategies", () => {

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