Add preprocessor defines to test cases

Author: sosthene-nitrokey

scripts/test.py

@@ -173,6 +173,7 @@ def __init__(self, path, args={}):
 
             # sort in case toml parsing did not retain order
             case_linenos.sort()
+            self.preproc_defines = config.pop("preproc_defines", {})
 
             cases = config.pop('cases')
             for (lineno, name), (nlineno, _) in it.zip_longest(
@@ -305,6 +306,13 @@ def writeln(s=''):
             f.writeln("//")
             f.writeln()
 
+            for name, value in suite.preproc_defines.items():
+                if value:
+                    f.writeln(f'#define {name} {value}')
+                else:
+                    f.writeln(f'#define {name}')
+                    
+
             # include test_runner.h in every generated file
             f.writeln("#include \"%s\"" % args['include'])
             f.writeln()

tests/test_shrink.toml

@@ -1,7 +1,11 @@
+[preproc_defines]
+LFS_SHRINKIFCHEAP = ""
+
 # simple shrink
 [cases.test_shrink_simple]
 defines.BLOCK_COUNT = [10, 15, 20]
 defines.AFTER_BLOCK_COUNT = [5, 10, 15, 19]
+   
 if = "AFTER_BLOCK_COUNT <= BLOCK_COUNT"
 code = '''
     lfs_t lfs;

tests/test_superblocks.toml

@@ -1,3 +1,6 @@
+[preproc_defines]
+LFS_SHRINKIFCHEAP = ""
+
 # simple formatting test
 [cases.test_superblocks_format]
 code = '''