fix other test

Author: rickeylev

tests/cc/py_cc_toolchain/py_cc_toolchain_tests.bzl

@@ -28,9 +28,9 @@ def _test_py_cc_toolchain(name):
         impl = _test_py_cc_toolchain_impl,
         target = "//tests/support/cc_toolchains:fake_py_cc_toolchain_impl",
         attrs = {
-            "header": attr.label(
-                default = "//tests/support/cc_toolchains:fake_header.h",
-                allow_single_file = True,
+            "header_files": attr.label_list(
+                default = ["//tests/support/cc_toolchains:py_header_files"],
+                allow_files = True,
             ),
         },
     )
@@ -50,12 +50,12 @@ def _test_py_cc_toolchain_impl(env, target):
     cc_info = headers_providers.get("CcInfo", factory = cc_info_subject)
 
     compilation_context = cc_info.compilation_context()
-    compilation_context.direct_headers().contains_exactly([
-        env.ctx.file.header,
-    ])
-    compilation_context.direct_public_headers().contains_exactly([
-        env.ctx.file.header,
-    ])
+    compilation_context.direct_headers().contains_exactly(
+        env.ctx.files.header_files,
+    )
+    compilation_context.direct_public_headers().contains_exactly(
+        env.ctx.files.header_files,
+    )
 
     # NOTE: The include dir gets added twice, once for the source path,
     # and once for the config-specific path, but we don't care about that.