[test] add .test.cpp suffix to test case files

test/util/http_timeout.test.cpp

@@ -0,0 +1,54 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/platform/log.hpp>
+#include <mbgl/util/http_timeout.hpp>
+#include <regex>
+#include <iostream>
+
+using namespace mbgl;
+using namespace mbgl::http;
+
+TEST(HttpRetry, OtherError) {
+    //Non-retryable
+    ASSERT_EQ(Duration::max(), errorRetryTimeout(Response::Error::Reason::Other, 1));
+}
+
+TEST(HttpRetry, ServerError) {
+    // 1-3 failures -> 1 sec
+    ASSERT_EQ(Seconds(1), errorRetryTimeout(Response::Error::Reason::Server, 1));
+    ASSERT_EQ(Seconds(1), errorRetryTimeout(Response::Error::Reason::Server, 3));
+    
+    // After 3, exponential backoff
+    ASSERT_EQ(Seconds(2), errorRetryTimeout(Response::Error::Reason::Server, 4));
+    ASSERT_EQ(Seconds(1u << 31), errorRetryTimeout(Response::Error::Reason::Server, 50));
+}
+
+TEST(HttpRetry, ConnectionError) {
+    // Exponential backoff
+    ASSERT_EQ(Seconds(1), errorRetryTimeout(Response::Error::Reason::Server, 1));
+    ASSERT_EQ(Seconds(1u << 31), errorRetryTimeout(Response::Error::Reason::Connection, 50));
+}
+
+TEST(HttpRetry, RateLimit) {
+    // Pre-set value from header
+    ASSERT_EQ(Seconds(1), errorRetryTimeout(Response::Error::Reason::Server, 1, { util::now() + Seconds(1) }));
+    
+    //Default
+    ASSERT_EQ(Seconds(5), errorRetryTimeout(Response::Error::Reason::RateLimit, 1, {}));
+}
+
+TEST(HttpRetry, ExpiredInitial) {
+    // 1 sec timeout
+    ASSERT_EQ(Seconds(1), expirationTimeout({ util::now() + Seconds(1) }, 0));
+}
+
+TEST(HttpRetry, ExpiredSubsequent) {
+    // exponential backoff
+    ASSERT_EQ(Seconds(1), expirationTimeout({}, 1));
+    ASSERT_EQ(Seconds(1u << 31), expirationTimeout({}, 50));
+}
+
+TEST(HttpRetry, ExpiredNotSet) {
+    // No expires header set
+    ASSERT_EQ(Duration::max(), expirationTimeout({}, 0));
+}