[render-test] Add access token to the test manifest

Needed if we want to run tests online. Will default to the
MAPBOX_ACCESS_TOKEN environment value.

render-test/manifest_parser.cpp

@@ -22,7 +22,13 @@ std::string prependFileScheme(const std::string& url) {
 }
 } // namespace
 
-Manifest::Manifest() = default;
+Manifest::Manifest() {
+    const char* envToken = getenv("MAPBOX_ACCESS_TOKEN");
+    if (envToken != nullptr) {
+        accessToken = envToken;
+    }
+}
+
 Manifest::~Manifest() = default;
 
 const std::vector<TestPaths>& Manifest::getTestPaths() const {
@@ -48,6 +54,10 @@ const std::string& Manifest::getCachePath() const {
     return cachePath;
 }
 
+const std::string& Manifest::getAccessToken() const {
+    return accessToken;
+}
+
 const std::set<std::string>& Manifest::getProbes() const {
     return probes;
 }
@@ -321,6 +331,19 @@ mbgl::optional<Manifest> ManifestParser::parseManifest(const std::string& manife
             return mbgl::nullopt;
         }
     }
+    if (document.HasMember("access_token")) {
+        const auto& accessTokenValue = document["access_token"];
+        if (!accessTokenValue.IsString()) {
+            mbgl::Log::Warning(mbgl::Event::General,
+                               "Invalid access_token is provided inside the manifest file: %s",
+                               filePath.c_str());
+            return mbgl::nullopt;
+        }
+        manifest.accessToken = accessTokenValue.GetString();
+        if (manifest.accessToken.empty()) {
+            return mbgl::nullopt;
+        }
+    }
     mbgl::filesystem::path baseTestPath;
     if (document.HasMember("base_test_path")) {
         const auto& testPathValue = document["base_test_path"];

render-test/manifest_parser.hpp

@@ -5,6 +5,7 @@
 #include <mbgl/util/optional.hpp>
 #include <mbgl/util/rapidjson.hpp>
 
+#include <cstdlib>
 #include <regex>
 #include <string>
 #include <utility>
@@ -21,6 +22,7 @@ public:
     const std::string& getManifestPath() const;
     const std::string& getResultPath() const;
     const std::string& getCachePath() const;
+    const std::string& getAccessToken() const;
     const std::set<std::string>& getProbes() const;
     void doShuffle(uint32_t seed);
 
@@ -49,6 +51,7 @@ private:
     std::string assetPath;
     std::string resultPath;
     std::string cachePath;
+    std::string accessToken;
     std::vector<std::pair<std::string, std::string>> ignores;
     std::vector<TestPaths> testPaths;
     std::set<std::string> probes;