[OE-core] [PATCH 02/14] testimage.bbclass: fix behavior of empty TEST_SUITES

[Chen Qi]

The current behaviour of TEST_SUITES is very confusing.

setting: TEST_SUITES = ""
result:  Execute all test cases.

setting: TEST_SUITES = "some_case_not_exist"
result:  Error out with 'Empty test suite' message.

The expected behaviour of TEST_SUITES should be:
1. when 'auto' is in it, execute as many test cases as possible
2. when no valid test case is specified, error out and give user message

The first one is implemented by a previous patch.
The second one is fixed in this patch.

Also add debug message to show test cases to be executed. This is
for easier debugging.

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 meta/classes/testimage.bbclass | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/meta/classes/testimage.bbclass b/meta/classes/testimage.bbclass
index bb688b0..d97da67 100644
--- a/meta/classes/testimage.bbclass
+++ b/meta/classes/testimage.bbclass
@@ -260,10 +260,16 @@ def testimage_main(d):
     # Load tests before starting the target
     test_paths = get_runtime_paths(d)
     test_modules = d.getVar('TEST_SUITES').split()
+    if not test_modules:
+        bb.fatal('Empty test suite, please verify TEST_SUITES variable')
+
     tc.loadTests(test_paths, modules=test_modules)
 
-    if not getSuiteCases(tc.suites):
+    suitecases = getSuiteCases(tc.suites)
+    if not suitecases:
         bb.fatal('Empty test suite, please verify TEST_SUITES variable')
+    else:
+        bb.debug(2, 'test suites:\n\t%s' % '\n\t'.join([str(c) for c in suitecases]))
 
     package_extraction(d, tc.suites)
 
-- 
1.9.1