[codex] Add utility unit tests

src/applications/osgearth_tests/CMakeLists.txt

@@ -8,6 +8,7 @@ set(TARGET_SRC
     PathTests.cpp
     ImageLayerTests.cpp
     SpatialReferenceTests.cpp
+    StringUtilsTests.cpp
     ThreadingTests.cpp)
 
 add_osgearth_app(

src/applications/osgearth_tests/StringUtilsTests.cpp

@@ -0,0 +1,64 @@
+/* osgEarth
+* Copyright 2025 Pelican Mapping
+* MIT License
+*/
+
+#include <osgEarth/catch.hpp>
+
+#include <osgEarth/FileUtils>
+#include <osgEarth/StringUtils>
+
+using namespace osgEarth;
+using namespace osgEarth::Util;
+
+TEST_CASE("FileUtils removes and extracts query parameters")
+{
+    const std::string url = "https://example.com/data/world.tif?token=abc&format=tif";
+
+    REQUIRE(removeQueryParams(url) == "https://example.com/data/world.tif");
+    REQUIRE(removeQueryParams("https://example.com/data/world.tif") == "https://example.com/data/world.tif");
+
+    auto params = extractQueryParams(url);
+    REQUIRE(params.size() == 2);
+    REQUIRE(params["token"] == "abc");
+    REQUIRE(params["format"] == "tif");
+}
+
+TEST_CASE("getFullPath resolves root-relative URL paths")
+{
+    const std::string path = getFullPath(
+        "https://example.com/maps/world.earth",
+        "/tiles/0/0/0.png");
+
+    REQUIRE(path == "https://example.com/tiles/0/0/0.png");
+}
+
+TEST_CASE("getFullPath merges URL query parameters")
+{
+    const std::string path = getFullPath(
+        "https://example.com/maps/world.earth?token=abc&z=9",
+        "../tiles/tile.png?format=png&token=ignored");
+
+    REQUIRE(path == "https://example.com/tiles/tile.png?format=png&token=abc&z=9");
+}
+
+TEST_CASE("StringTokenizer handles multi-character delimiters")
+{
+    auto tokens = StringTokenizer()
+        .delim("::", true)
+        .keepEmpties(false)
+        .tokenize("alpha::beta::gamma");
+
+    const StringVector expected{ "alpha", "::", "beta", "::", "gamma" };
+    REQUIRE(tokens == expected);
+}
+
+TEST_CASE("StringUtils unquotes and parses booleans")
+{
+    REQUIRE(unquote("  '\"hello\"'  ") == "hello");
+
+    REQUIRE(as<bool>("ON", false));
+    REQUIRE_FALSE(as<bool>("off", true));
+    REQUIRE(as<bool>("maybe", true));
+    REQUIRE_FALSE(as<bool>("maybe", false));
+}