[PATCH] oeqa/sdk/sdktest: Add test discovery across layers

[Thune Tran <thune.a.tran@boeing.com>]

The testsdk task only loads SDK tests from the openembedded-core
layer's meta/lib/oeqa/sdk/cases/.

This patch implements test discovery to include SDK tests from all
configured layers that mirror <LAYER_DIR>/lib/oeqa/sdk/cases/. The
implementation mirrors get_runtime_paths() in meta/classes-recipe/testimage.

Tested by:

1. Adding SDK test cases to <LAYER_DIR>/lib/oeqa/sdk/cases/ and
   verifying they are discovered and executed with no errors.
2. Verifying existing SDK test cases in openembedded-core layer
   are discovered and executed with no errors.

Signed-off-by: Thune Tran <thune.a.tran@boeing.com>
Signed-off-by: Chuck Wolber <chuck.wolber@boeing.com>
---
 meta/lib/oeqa/sdk/testsdk.py | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/sdk/testsdk.py b/meta/lib/oeqa/sdk/testsdk.py
index 518b09febb..505add8f8c 100644
--- a/meta/lib/oeqa/sdk/testsdk.py
+++ b/meta/lib/oeqa/sdk/testsdk.py
@@ -31,6 +31,20 @@ class TestSDK(TestSDKBase):
     context_class = OESDKTestContext
     test_type = 'sdk'
 
+    def get_sdk_paths(self, d):
+        """
+        Returns a list of paths where SDK test must reside.
+
+        SDK tests are expected in <LAYER_DIR>/lib/oeqa/sdk/cases/
+        """
+        paths = []
+
+        for layer in d.getVar('BBLAYERS').split():
+            path = os.path.join(layer, 'lib/oeqa/sdk/cases')
+            if os.path.isdir(path):
+                paths.append(path)
+        return paths
+
     def get_tcname(self, d):
         """
         Get the name of the SDK file
@@ -114,7 +128,7 @@ class TestSDK(TestSDKBase):
                 host_pkg_manifest=host_pkg_manifest, **context_args)
 
             try:
-                tc.loadTests(self.context_executor_class.default_cases)
+                tc.loadTests(self.get_sdk_paths(d))
             except Exception as e:
                 import traceback
                 bb.fatal("Loading tests failed:\n%s" % traceback.format_exc())
-- 
2.34.1