[dbarker]

Contributes to #454

Adds initial CI testing of examples to address #454

Part 1 focuses on adding a basic tests to:

1. Build all examples against the installed opentelemetry-cpp package to verify
   • only imported/alias targets are used
   • examples don't rely on internal cmake functions or global includes/declarations
2. Run a simple test of the single process examples to ensure they run and exit cleanly. These tests are added when WITH_EXAMPLES and BUILD_TESTING CMake options are ON.
   • examples/batch
   • examples/simple
   • examples/logs_simple
   • examples/metrics_simple
   • examples/multithreaded
   • examples/multi_processor
   • examples/etw_threads
   • examples/plugin

The multi-process examples are not run and can be addressed in a future PR.

Changes

• Remove internal cmake functions from the grpc example and foo* library examples
• Remove grpc and span exporter headers from the grpc_metric_main.cc example
• Add simple tests for each of the single process examples
• Add an install test to build and run the examples based on components installed
• Clean up the conan build artifacts on the runner to make space for the examples build
• Link the api target publicly to the dll target
• Remove running the simple* examples in CI by the cmake.dll.* tests which will now run all new examples tests with ctest.

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[netlify]

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Name	Link
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.92%. Comparing base (d64b653) to head (c2106c0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3449      +/-   ##
==========================================
+ Coverage   89.89%   89.92%   +0.03%     
==========================================
  Files         212      219       +7     
  Lines        6942     7041      +99     
==========================================
+ Hits         6240     6331      +91     
- Misses        702      710       +8     

see 14 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[marcalff]

LGTM