[PATCH v3 2/3] libcanera: yaml-parser: Add failing test for unexpected behavior

[Stefan Klug]

When accessing a nonexistent key on a dict the YamlObject returns an
empty element. This element can happily be cast to a string. This is
unexpected. For example the following statement:

yamlDict["nonexistent"].get<string>("default")

is expected to return "default" but actually returns "". Add a (failing)
testcase for that behavior.

Signed-off-by: Stefan Klug <stefan.klug at ideasonboard.com>

---
Changes in v3:
- Added separate patch for the failing test
---
 test/yaml-parser.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/yaml-parser.cpp b/test/yaml-parser.cpp
index 347999831d61..4cc77e26ae39 100644
--- a/test/yaml-parser.cpp
+++ b/test/yaml-parser.cpp
@@ -536,6 +536,12 @@ protected:
 			return TestFail;
 		}
 
+		/* Test access to nonexistent member. */
+		if (dictObj["nonexistent"].get<std::string>("default") != "default") {
+			cerr << "Accessing nonexistent dict entry fails to return default" << std::endl;
+			return TestFail;
+		}
+
 		/* Make sure utils::map_keys() works on the adapter. */
 		(void)utils::map_keys(dictObj.asDict());
 
-- 
2.43.0