From b84c414f2e4d8461f6a6cd44e5deb81a1753bce4 Mon Sep 17 00:00:00 2001
From: Artem Pavlenko <artem@mapnik.org>
Date: Tue, 5 Nov 2019 09:53:41 +0000
Subject: [PATCH] Add unit test for 7003255c0e6d9e80295d04ee416f25db38fa7b0d 
 (#4096)

---
 test/unit/text/script_runs.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test/unit/text/script_runs.cpp b/test/unit/text/script_runs.cpp
index e9bbcb030..dd40e1b1e 100644
--- a/test/unit/text/script_runs.cpp
+++ b/test/unit/text/script_runs.cpp
@@ -31,3 +31,18 @@ TEST_CASE("many punctuation chars")
         CHECK(runs.getScriptEnd() == text.length());
     }
 }
+
+TEST_CASE("empty runs")
+{
+    mapnik::value_unicode_string text("()text");
+    ScriptRun runs(text.getBuffer(), text.length());
+    std::size_t count = 0;
+    std::size_t size = 0;
+    while (runs.next())
+    {
+        size += runs.getScriptEnd() - runs.getScriptStart();
+        ++count;
+    }
+    REQUIRE(count == 1);
+    REQUIRE(size == text.length());
+}