Add more message signing tests to increase code coverage.

README.md

@@ -31,7 +31,7 @@ You can also include the library as a submodule in your project.
 
 ### Running the tests
 
-Libmav uses [doctest](https://github.com/doctest/doctest/).
+Libmav uses [doctest](https://github.com/doctest/doctest/) and [gcovr](https://github.com/gcovr/gcovr/).
 
 To run the tests, build the library, then run the test executable. Test results will be output to console.
 
@@ -40,6 +40,11 @@ mkdir build && cd build && cmake .. && make tests
 ./tests/tests
 ```
 
+To test coverage, simple invoke the coverage tool from the root directory.
+```bash
+gcovr
+```
+
 ## Getting started
 
 ### Loading a message set

gcovr.cfg

@@ -1,3 +1,4 @@
 exclude-throw-branches = yes
 filter = include/mav
-exclude = include/mav/rapidxml/*
+exclude = include/mav/rapidxml/*
+exclude = include/mav/picosha2/*

tests/Network.cpp

@@ -90,6 +90,9 @@ class DummyInterface : public NetworkInterface {
     }
 };
 
+uint64_t getTimestamp() {
+    return 770479200;
+}
 
 TEST_CASE("Create network runtime") {
 
@@ -122,6 +125,9 @@ TEST_CASE("Create network runtime") {
     DummyInterface interface;
     NetworkRuntime network({253, 1}, message_set, interface);
 
+    std::array<uint8_t, 32> key;
+    for (int i = 0 ; i < 32; i++) key[i] = i;
+
     // send a heartbeat message, to establish a connection
     interface.addToReceiveQueue("\xfd\x09\x00\x00\x00\xfd\x01\x00\x00\x00\x04\x00\x00\x00\x01\x02\x03\x05\x06\x77\x53"s, interface_partner);
     auto connection = network.awaitConnection();
@@ -200,4 +206,50 @@ TEST_CASE("Create network runtime") {
         CHECK_EQ(message.name(), "HEARTBEAT");
         CHECK(connection->alive());
     }
+
+    SUBCASE("Enable message signing") {
+        auto message = message_set.create("TEST_MESSAGE")({
+          {"value", 42},
+          {"text", "Hello World!"}
+        });
+        interface.reset();
+        network.enableMessageSigning(key);
+        connection->send(message);
+        CHECK(message.header().isSigned());
+        // don't check anything after link_id in signature as the timestamp is dependent on current time
+        bool found = (interface.sendSpongeContains(
+                "\xfd\x10\x01\x00\x00\xfd\x01\xbc\x26\x00\x2a\x00\x00\x00\x48\x65\x6c\x6c\x6f\x20\x57\x6f\x72\x6c\x64\x21\xfd\x33\x00"s,
+                interface_partner));
+        CHECK(found);
+    }
+
+    SUBCASE("Enable message signing with custom timestamp function") {
+        auto message = message_set.create("TEST_MESSAGE")({
+          {"value", 42},
+          {"text", "Hello World!"}
+        });
+        interface.reset();
+        network.enableMessageSigning(key, getTimestamp);
+        connection->send(message);
+        CHECK(message.header().isSigned());
+        bool found = (interface.sendSpongeContains(
+                "\xfd\x10\x01\x00\x00\xfd\x01\xbc\x26\x00\x2a\x00\x00\x00\x48\x65\x6c\x6c\x6f\x20\x57\x6f\x72\x6c\x64\x21\xfd\x33\x00\x60\x94\xec\x2d\x00\x00\x7b\xab\xfa\x1a\xed\xf9"s,
+                interface_partner));
+        CHECK(found);
+    }
+
+    SUBCASE("Disable message signing") {
+        auto message = message_set.create("TEST_MESSAGE")({
+          {"value", 42},
+          {"text", "Hello World!"}
+        });
+        interface.reset();
+        network.disableMessageSigning();
+        connection->send(message);
+        CHECK(!message.header().isSigned());
+        bool found = (interface.sendSpongeContains(
+                "\xfd\x10\x00\x00\x00\xfd\x01\xbc\x26\x00\x2a\x00\x00\x00\x48\x65\x6c\x6c\x6f\x20\x57\x6f\x72\x6c\x64\x21\x86\x37"s,
+                interface_partner));
+        CHECK(found);
+    }
 }