Generate test coverage report in CircleCI (#110)

* coverage?

* generate_coverage

* +x

* 1.62.1

* 62

* ignore

* store

* quote

Author: drdrsh

.circleci/config.yml

@@ -9,9 +9,11 @@ jobs:
     # Specify the execution environment. You can specify an image from Dockerhub or use one of our Convenience Images from CircleCI's Developer Hub.
     # See: https://circleci.com/docs/2.0/configuration-reference/#docker-machine-macos-windows-executor
     docker:
-      - image: cimg/rust:1.58.1
+      - image: cimg/rust:1.62.0
         environment:
           RUST_LOG: info
+          RUSTFLAGS: "-C instrument-coverage"
+          LLVM_PROFILE_FILE: "pgcat-%m.profraw"
       - image: postgres:14
         # auth:
         #   username: mydockerhub-user
@@ -32,16 +34,19 @@ jobs:
           command: "cargo fmt --check"
       - run:
           name: "Install dependencies"
-          command: "sudo apt-get update && sudo apt-get install -y psmisc postgresql-contrib-12 postgresql-client-12 ruby ruby-dev libpq-dev python3 python3-pip"
+          command: "sudo apt-get update && sudo apt-get install -y psmisc postgresql-contrib-12 postgresql-client-12 ruby ruby-dev libpq-dev python3 python3-pip lcov llvm-11"
+      - run:
+          name: "Install rust tools"
+          command: "cargo install cargo-binutils rustfilt && rustup component add llvm-tools-preview"
       - run:
           name: "Build"
           command: "cargo build"
       - run:
-          name: "Test"
-          command: "cargo test"
-      - run:
-          name: "Test end-to-end"
-          command: "bash .circleci/run_tests.sh"
+          name: "Tests"
+          command: "cargo test && bash .circleci/run_tests.sh && .circleci/generate_coverage.sh"
+      - store_artifacts:
+          path: /tmp/cov
+          destination: coverage-data
       - save_cache:
           key: cargo-lock-2-{{ checksum "Cargo.lock" }}
           paths:

.circleci/generate_coverage.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+rust-profdata merge -sparse pgcat-*.profraw -o pgcat.profdata
+
+rust-cov export -ignore-filename-regex="rustc|registry" -Xdemangler=rustfilt -instr-profile=pgcat.profdata --object ./target/debug/pgcat --format lcov > ./lcov.info
+
+genhtml lcov.info --output-directory /tmp/cov --prefix $(pwd)