execute the correct server path and use the exepath for application root rather than the cwd

platform/default/application_root.cpp

@@ -1,14 +1,28 @@
 #include <mbgl/platform/platform.hpp>
 
-#include <mbgl/util/uv.hpp>
+#include <uv.h>
+#include <libgen.h>
 
 namespace mbgl {
 namespace platform {
 
 // Returns the path to the root folder of the application.
 const std::string &applicationRoot() {
-    static const std::string root = uv::cwd();
+    static const std::string root = []() -> std::string {
+        size_t max = 0;
+        std::string dir;
+        do {
+            // Gradually increase the length of the string in case the path was truncated.
+            max += 256;
+            dir.resize(max);
+            uv_exepath(const_cast<char *>(dir.data()), &max);
+        } while (max == dir.size());
+        dir.resize(max - 1);
+        dir = dirname(const_cast<char *>(dir.c_str()));
+        return dir;
+    }();
     return root;
 }
+
 }
 }

test/headless/headless.cpp

@@ -4,7 +4,6 @@
 #include <mbgl/map/map.hpp>
 #include <mbgl/util/image.hpp>
 #include <mbgl/util/std.hpp>
-#include <mbgl/platform/platform.hpp>
 
 #include <mbgl/util/io.hpp>
 #include <rapidjson/document.h>
@@ -30,7 +29,7 @@ void rewriteLocalScheme(rapidjson::Value &value, rapidjson::Document::AllocatorT
 class HeadlessTest : public ::testing::TestWithParam<std::string> {
 public:
     static void SetUpTestCase() {
-        const auto server = mbgl::platform::applicationRoot() + "/TEST_DATA/headless/server.js";
+        const auto server = mbgl::test::getBaseDirectory() + "/headless/server.js";
         pid = mbgl::test::startServer(server.c_str());
         display = std::make_shared<mbgl::HeadlessDisplay>();
     }

test/storage/storage.cpp

@@ -1,10 +1,9 @@
 #include "storage.hpp"
-#include <mbgl/platform/platform.hpp>
 
 pid_t Storage::pid = 0;
 
 void Storage::SetUpTestCase() {
-    const auto server = mbgl::platform::applicationRoot() + "/TEST_DATA/storage/server.js";
+    const auto server = mbgl::test::getBaseDirectory() + "/storage/server.js";
     pid = mbgl::test::startServer(server.c_str());
 }