Nicer messages when skipping tracer types during testing.

2 files changed, 15 insertions, 11 deletions

diff --git a/igor.py b/igor.py
index 3a1b6e23..6a42df59 100644
--- a/igor.py
+++ b/igor.py
@@ -45,14 +45,18 @@ def run_tests(tracer, *nose_args):
     import nose.core
     if tracer == "py":
         label = "with Python tracer"
-        if os.environ.get("COVERAGE_NO_PYTRACER"):
-            print("Skipping tests, don't want PyTracer")
-            return
+        skipper = os.environ.get("COVERAGE_NO_PYTRACER")
     else:
         label = "with C tracer"
-        if os.environ.get("COVERAGE_NO_EXTENSION"):
-            print("Skipping tests, no C extension in this environment")
-            return
+        skipper = os.environ.get("COVERAGE_NO_EXTENSION")
+
+    if skipper:
+        msg = "Skipping tests " + label
+        if len(skipper) > 1:
+            msg += ": " + skipper
+        print(msg)
+        return
+
     print_banner(label)
     os.environ["COVERAGE_TEST_TRACER"] = tracer
     nose_args = ["nosetests"] + list(nose_args)
diff --git a/tox.ini b/tox.ini
index 3b78ea52..c1dc50b0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -62,28 +62,28 @@ deps =
 basepython = pypy2.2
 # PyPy has no C extensions
 setenv =
-    COVERAGE_NO_EXTENSION=1
+    COVERAGE_NO_EXTENSION=no C extensions under PyPy
 
 [testenv:pypy23]
 basepython = pypy2.3
 # PyPy has no C extensions
 setenv =
-    COVERAGE_NO_EXTENSION=1
+    COVERAGE_NO_EXTENSION=no C extensions under PyPy
 
 [testenv:pypy24]
 basepython = pypy2.4
 # PyPy has no C extensions
 setenv =
-    COVERAGE_NO_EXTENSION=1
+    COVERAGE_NO_EXTENSION=no C extensions under PyPy
 
 [testenv:pypy3_23]
 basepython = pypy3-2.3
 # PyPy has no C extensions
 setenv =
-    COVERAGE_NO_EXTENSION=1
+    COVERAGE_NO_EXTENSION=no C extensions under PyPy
 
 [testenv:pypy3_24]
 basepython = pypy3-2.4
 # PyPy has no C extensions
 setenv =
-    COVERAGE_NO_EXTENSION=1
+    COVERAGE_NO_EXTENSION=no C extensions under PyPy