Merge remote-tracking branch 'public/fancy_test_tricks'

Conflicts:
	src/common/include.am

Conflict was from adding testsupport.h near where sandbox.h had
already been added.

1 files changed, 27 insertions, 0 deletions

diff --git a/changes/fancy_testing b/changes/fancy_testing
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+  o Build features:
+
+    - Tor now builds each source file in two modes: a mode that avoids
+      exposing identifiers needlessly, and another mode that exposes
+      more identifiers for testing. This lets the compiler do better at
+      optimizing the production code, while enabling us to take more
+      radical measures to let the unit tests test things.
+
+    - The production builds no longer include functions used only
+      in the unit tests; all functions exposed from a module for
+      unit-testing only are now static in production builds.
+
+    - Add an --enable-coverage configuration option to make the unit
+      tests (and a new src/or/tor-cov target) to build with gcov test
+      coverage support.
+
+  o Testing:
+
+    - We now have rudimentary function mocking support that our unit
+      tests can use to test functions in isolation. Function mocking
+      lets the tests temporarily replace a function's dependencies with
+      stub functions, so that the tests can check the function without
+      invoking the other functions it calls.
+
+    - Add more unit tests for the <circid,channel>->circuit map, and
+      the destroy-cell-tracking code to fix bug 7912.
+