#1: restore cmake variable and add a unit test

Author: tlamonthezie

build-in-docker.sh

@@ -0,0 +1,21 @@
+WORKSPACE=/workspace
+IMAGE=lifflander1/vt:wf-amd64-ubuntu-20.04-gcc-9-cuda-11.2.2-cpp
+
+CMD='
+    cd '$WORKSPACE'; \
+    ls -l;
+    chmod +x ./build.sh; \
+    \
+    export $(cat .env | egrep -v "(^#.*|^$)" | xargs) && ./build.sh'
+
+docker run \
+      --name test-container \
+      -w $WORKSPACE \
+      -v .:/workspace \
+      -v /opt/foo/build:/opt/foo/build \
+      -v /opt/foo/output:/opt/foo/output \
+      -e CI="1" \
+      -e https_proxy="" \
+      -e http_proxy="" \
+      $IMAGE \
+      bash -c "$CMD"

cmake/turn_on_warnings.cmake

@@ -30,7 +30,7 @@ if(NOT DEFINED FOO_WARNING_FLAGS)
   endif()
 
   if (FOO_WERROR_ENABLED)   # Treat warning as errors
-    # add_cxx_compiler_flag_if_supported("-Werror")
+    add_cxx_compiler_flag_if_supported("-Werror")
   endif()
 endif()
 

tests/unit/foo/bar/bar_test.cc

@@ -0,0 +1,10 @@
+#include <gtest/gtest.h>
+
+#include "foo/bar/bar.h"
+
+// Demonstrate some basic assertions.
+TEST(BarTest, BasicAssertions) {
+  auto bar = foo::bar::Bar();
+  auto n = bar.diff(5, 3);
+  EXPECT_EQ(n, 2);
+}