ci: use nextest for running rust tests (MystenLabs#2031)

.config/nextest.toml

@@ -0,0 +1,13 @@
+[profile.ci]
+# Print out output for failing tests as soon as they fail, and also at the end
+# of the run (for easy scrollability).
+failure-output = "immediate-final"
+# Show skipped tests in the CI output.
+status-level = "skip"
+# Do not cancel the test run on the first failure.
+fail-fast = false
+# Retry failing tests in order to not block builds on flaky tests
+retries = 2
+
+[profile.ci.junit]
+path = "junit.xml"

.github/workflows/rust.yml

@@ -58,17 +58,13 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
-      # Disable caching on self-hosted jobs
-      # Enable caching of the 'librocksdb-sys' crate by additionally caching the
-      # 'librocksdb-sys' src directory which is managed by cargo
-      # - uses: bmwill/rust-cache@v1 # Fork of 'Swatinem/rust-cache' which allows caching additional paths
-      #   with:
-      #     path: ~/.cargo/registry/src/**/librocksdb-sys-*
+      - uses: taiki-e/install-action@nextest
       - name: cargo test
         run: |
-          cargo build --all-features --lib
-          cargo test --all-features --no-run # -j N # uncomment and set a low number if builds start OOMing again
-          cargo test --all-features
+          cargo nextest run --all-features --profile ci
+      - name: Doctests
+        run: |
+          cargo test --doc --all-features
       # Ensure there are no uncommitted changes in the repo after running tests
       - run: scripts/changed-files.sh