Fix several silently failing tests (#2767)

* Add missing expected.txt for test

* Diagnostics -> StdWriters in render test

* Allow specifying several test prefixes to run

`slang-test -- tests/foo tests/bar`

* Squash warnings in some tests

* Enable gfx debug layer in gfx test util

Makes this issue present consistently: https://github.com/shader-slang/slang/issues/2766

* Allow DebugDevice to return interfaces instantiated by the debugged object

* Check that we actaully have a shader cache for shader cache tests

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index 71f5c04bd..51c618187 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -3900,15 +3900,20 @@ static bool shouldRunTest(
     if(!endsWithAllowedExtension(context, filePath))
         return false;
 
-    if( context->options.testPrefix )
+    if(!context->options.testPrefixes.getCount())
     {
-        if( strncmp(context->options.testPrefix, filePath.begin(), strlen(context->options.testPrefix)) != 0 )
+        return true;
+    }
+
+    // If we have prefixes, it has to match one of them
+    for(auto& p : context->options.testPrefixes)
+    {
+        if(filePath.startsWith(p))
         {
-            return false;
+            return true;
         }
     }
-
-    return true;
+    return false;
 }
 
 void getFilesInDirectory(String directoryPath, List<String>& files)