[PATCH 1/2] oeqa: add utils/data.py with get_data() function

[Mikko Rapeli <mikko.rapeli@linaro.org>]

get_data() uses oeqa test method name and an optional
key to get data from image specific "testimage_data.json"
file located in image deploy directory. Image recipes can
provide custom versions of this file which configures
generic tests for a specific image when testing with
testimage.bbclass

For example, the parselogs.py runtime test needs image
specific configuration when the image has new errors from
the kernel which acceptable and can be ignored.

Same machine can be used to generate multiple images with different
runtime behavior so using image as the key and not machine.

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 meta/lib/oeqa/utils/data.py | 41 +++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 meta/lib/oeqa/utils/data.py

diff --git a/meta/lib/oeqa/utils/data.py b/meta/lib/oeqa/utils/data.py
new file mode 100644
index 0000000000..4b8c10c1d0
--- /dev/null
+++ b/meta/lib/oeqa/utils/data.py
@@ -0,0 +1,41 @@
+# Copyright (C) 2022 Linaro Limited
+#
+# SPDX-License-Identifier: MIT
+
+import os
+import json
+
+from oeqa.core.utils.test import getCaseID, getCaseFile, getCaseMethod
+
+
+def get_data(self, key = None):
+    """get_data() returns test case specific data to the test case implementation.
+    Data is stored in image specific json file called "testimage_data.json" in
+    image deploy directory. Image recipes can provide custom versions of this file.
+    Data matching test method name and an optional key is returned to the test case.
+    This data can then be used by generic test cases to match image specific functionality
+    and expected behavior. For example list of expected kernel error strings, list
+    of active systemd services etc. can be image specific while the test case
+    implementation to check them is generic. Example json file for runtime
+    test parselogs.py to ignore image specific kernel error strings in dmesg:
+
+    {"test_parselogs":{"ignore_errors":[
+        "Error to be ignored in dmesg"
+    ]}}
+    """
+    test_method = getCaseMethod(self)
+    self.logger.info("%s: get_data() called by test_method =  %s, key = %s" % (__file__, test_method, key))
+
+    json_file_name = os.path.join(self.td['DEPLOY_DIR_IMAGE'], "testimage_data.json")
+    self.logger.debug("%s: json_file_name = %s" % (__file__, json_file_name))
+
+    with open(json_file_name) as json_file:
+        self.logger.debug("%s: json_file = %s" % (__file__, json_file))
+        json_data = json.load(json_file)
+        self.logger.debug("%s: json_data = %s" % (__file__, json_data))
+        if key:
+            data = json_data[test_method][key]
+        else:
+            data = json_data[test_method]
+        self.logger.debug("%s: data = %s" % (__file__, data))
+        return data
-- 
2.34.1