Background & Motivation
The sessions specification has two sets of JSON/YML tests:

• sessions/tests/unified
• sessions/tests/legacy

DRIVERS-815 includes new sessions tests written in the Unified Test Format under sessions/tests/unified. The C++ driver has a unified test format runner.

The C++ driver does not have a runner for the legacy sessions specification. CXX-2087 notes all test runners the C++ driver does not implement. The Snapshot Reads Specification did not introduce any new legacy sessions tests.

Scope

• Download the sessions unified test files into a new directory /data/sessions/unified
• Add a TEST_CASE to the unified test runner's runner.cpp
• Update the unified test runner if necessary to run the new tests.