Add code coverage measurements to test script

Brewfile

@@ -3,4 +3,7 @@ brew 'cmake'
 brew 'go'
 brew 'llvm'
 brew 'protobuf'
-brew 'openssl'
+brew 'openssl'
+
+# Test dependencies
+brew 'lcov'

README.md

@@ -69,7 +69,7 @@ sudo xcode-select -s /Applications/Xcode_12.5.1.app/Contents/Developer
 
    On Ubuntu:
     ```sh
-    sudo apt install build-essential cmake protobuf-compiler libprotobuf-dev llvm llvm-dev clang libclang-dev libsqlite3-dev libssl-dev
+    sudo apt install build-essential cmake protobuf-compiler libprotobuf-dev llvm llvm-dev clang libclang-dev libsqlite3-dev libssl-dev lcov
     ```
 
    On MacOS:
@@ -95,6 +95,10 @@ sudo xcode-select -s /Applications/Xcode_12.5.1.app/Contents/Developer
    export PKG_CONFIG_PATH="/opt/homebrew/opt/openssl@3/lib/pkgconfig"
     ```
 
+   Finally for both:
+   ```sh
+   rustup component add llvm-tools-preview
+   ```
 
 4. Pull submodule.
 
@@ -428,6 +432,9 @@ Under the covers, this runs:
 SGX_MODE=HW \
 IAS_MODE=DEV \
 CONSENSUS_ENCLAVE_CSS=$(pwd)/consensus-enclave.css \
+CARGO_INCREMENTAL=0 \
+RUSTFLAGS='-Cinstrument-coverage' \
+LLVM_PROFILE_FILE="../target/profraw/json5format-%m.profraw" \
 cargo test
 ```
 

mirror/test/README.md

@@ -2,7 +2,7 @@
 
 This directory contains a shell script + associated files for testing a full service mirror release.
 
-This can be run with varying degress of automation. Either with docker, or by running run.sh with a binary you downloaded yourself
+This can be run with varying degrees of automation. Either with docker, or by running run.sh with a binary you downloaded yourself
 
 ## Test with Docker
 

tools/test.sh

@@ -11,7 +11,22 @@ if [[ ! -z "$1" ]]; then
 fi
 
 echo "Testing in $PWD"
-LLVM_PROFILE_FILE="json5format-%m.profraw" \
+CARGO_INCREMENTAL=0 RUSTFLAGS='-Cinstrument-coverage' LLVM_PROFILE_FILE="../target/profraw/json5format-%m.profraw" \
 SGX_MODE=SW IAS_MODE=DEV CONSENSUS_ENCLAVE_CSS=$(pwd)/consensus-enclave.css \
-cargo test -p mc-full-service
+cargo test
 echo "Testing in $PWD complete."
+
+echo "Building coverage report (lcov) html to target/coverage/results"
+mkdir -p ./target/coverage
+grcov . --binary-path ./target/debug/deps/ --source-dir . -t lcov --branch --ignore-not-existing \
+--ignore "../*" --ignore "/*" --ignore "mobilecoin/*" --ignore "target/*" --ignore "*/e2e_tests/*" \
+-o ./target/coverage/tests.lcov
+genhtml ./target/coverage/tests.lcov --show-details --prefix "$PWD" --output-directory ./target/coverage/results
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  open ./target/coverage/results/index.html
+#elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  # ...
+else
+  echo "test output written to target/coverage/results/index.html"
+fi