feat(cpp): part of low-level bindings, their tests, and e2e CI config (#2852)

Author: slbotbm

.github/actions/cpp-bazel/pre-merge/action.yml

@@ -20,7 +20,7 @@ description: C++ pre-merge testing github iggy actions
 
 inputs:
   task:
-    description: "Task to run (lint, build, test)"
+    description: "Task to run (lint, build, test, e2e)"
     required: true
 
 runs:
@@ -70,11 +70,26 @@ runs:
       shell: bash
       run: |
         cd foreign/cpp
-        bazel test --config=ci //:iggy-cpp-test
+        bazel test --config=ci //:unit
+
+    - name: Setup server for e2e tests
+      if: inputs.task == 'e2e'
+      uses: ./.github/actions/utils/server-start
+
+    - name: Run e2e tests
+      if: inputs.task == 'e2e'
+      shell: bash
+      run: |
+        cd foreign/cpp
+        bazel test --config=ci //:low-level-e2e
+
+    - name: Stop server after e2e tests
+      if: always() && inputs.task == 'e2e'
+      uses: ./.github/actions/utils/server-stop
 
     - name: Validate task
-      if: inputs.task != 'lint' && inputs.task != 'build' && inputs.task != 'test'
+      if: inputs.task != 'lint' && inputs.task != 'build' && inputs.task != 'test' && inputs.task != 'e2e'
       shell: bash
       run: |
-        echo "::error::Unsupported task '${{ inputs.task }}'. Expected one of: lint, build, test."
+        echo "::error::Unsupported task '${{ inputs.task }}'. Expected one of: lint, build, test, e2e."
         exit 1

.github/config/components.yml

@@ -214,7 +214,7 @@ components:
       - "ci-infrastructure"
     paths:
       - "foreign/cpp/**"
-    tasks: ["lint", "build", "test"]
+    tasks: ["lint", "build", "test", "e2e"]
 
   # Individual BDD tests per SDK - only run when specific SDK changes
   bdd-rust:

foreign/cpp/BUILD.bazel

@@ -28,6 +28,7 @@ genrule(
         "libiggy_cpp.a",
         "include/lib.rs.h",
         "cxxbridge/rust/cxx.h",
+        "cxxbridge/sources/lib.rs.cc",
     ],
     cmd = """
         set -euo pipefail
@@ -38,6 +39,7 @@ genrule(
         OUT_LIB="$$EXECROOT/$(location libiggy_cpp.a)"
         OUT_RS="$$EXECROOT/$(location include/lib.rs.h)"
         OUT_CXX="$$EXECROOT/$(location cxxbridge/rust/cxx.h)"
+        OUT_CC="$$EXECROOT/$(location cxxbridge/sources/lib.rs.cc)"
 
         PROJECT_ROOT="$$(dirname $$(readlink -f $(location Cargo.toml)))"
         cd "$$PROJECT_ROOT"
@@ -67,6 +69,13 @@ genrule(
             exit 1
         fi
         cp "$$CXX_HDR" "$$OUT_CXX"
+
+        CC_SRC="$$(find "$$CARGO_TARGET_DIR/$$PROFILE/build" -path '*/out/cxxbridge/sources/*/src/lib.rs.cc' -print -quit)"
+        if [ -z "$$CC_SRC" ]; then
+            echo "ERROR: Failed to locate generated lib.rs.cc under $$CARGO_TARGET_DIR/$$PROFILE/build" >&2
+            exit 1
+        fi
+        cp "$$CC_SRC" "$$OUT_CC"
     """,
     local = 1,
 )
@@ -80,7 +89,9 @@ cc_library(
     name = "iggy-cpp",
     srcs = glob([
         "src/*.cpp",
-    ], allow_empty = True),
+    ], allow_empty = True) + [
+        ":cxxbridge/sources/lib.rs.cc",
+    ],
     hdrs = [
         "include/iggy.hpp",
         ":include/lib.rs.h",
@@ -106,8 +117,26 @@ cc_library(
 )
 
 cc_test(
-    name = "iggy-cpp-test",
-    srcs = ["tests/test.cpp"],
+    name = "unit",
+    srcs = [
+        "tests/unit_tests.cpp",
+    ],
+    deps = [
+        ":iggy-cpp",
+        "@googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "low-level-e2e",
+    srcs = glob([
+        "tests/**/low_level_e2e.cpp",
+    ]) + [
+        "tests/common/test_helpers.hpp",
+    ],
+    tags = [
+        "e2e",
+    ],
     deps = [
         ":iggy-cpp",
         "@googletest//:gtest_main",