["CC/test", "test"] rename implict dependency

... and document at the appropriate place

2 files changed, 13 insertions, 2 deletions

diff --git a/rules/CC/test/RULES b/rules/CC/test/RULES
index 41507d7e..af413a9b 100644
--- a/rules/CC/test/RULES
+++ b/rules/CC/test/RULES
@@ -29,7 +29,7 @@
     ]
   , "implicit":
     { "defaults": [["./", "..", "defaults"]]
-    , "runner": ["test_runner.py"]
+    , "runner": ["runner"]
     , "summarizer": [["./", "../../shell/test", "summarizer"]]
     }
   , "field_doc":
@@ -39,7 +39,18 @@
       , "Used to name the test binary as well as for staging the test result"
       ]
     , "args": ["Command line arguments for the test binary"]
-    , "srcs": ["The sources of the test binary"]
+    , "srcs":
+      [ "The sources of the test binary"
+      , ""
+      , "The resulting test binary in an environment where it can assume"
+      , "that the environment variable TEST_TMPDIR points to a"
+      , "director that may be used exclusively by this test."
+      , ""
+      , "This running of the test is carried out by the implicit dependency"
+      , "on the target \"runner\". By setting this target in the target layer"
+      , "of this rues repository (instead of letting it default to the"
+      , "respective file), the C/C++ test environment can be modified globally."
+      ]
     , "private-hdrs":
       [ "Any additional header files that need to be present when compiling"
       , "the test binary."
diff --git a/rules/CC/test/test_runner.py b/rules/CC/test/runner
index 0647621f..0647621f 100755
--- a/rules/CC/test/test_runner.py
+++ b/rules/CC/test/runner