Add a test for the clean tool.

It also fix a bug about the count of removed file reported.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/test.cc b/src/test.cc
index 241c8d3..4dc2f47 100644
--- a/src/test.cc
+++ b/src/test.cc
@@ -58,3 +58,14 @@ string VirtualFileSystem::ReadFile(const string& path, string* err) {
     return i->second.contents;
   return "";
 }
+
+bool VirtualFileSystem::RemoveFile(const string& path) {
+  FileMap::iterator i = files_.find(path);
+  if (i != files_.end()) {
+    files_.erase(i);
+    files_removed_.insert(path);
+    return true;
+  } else {
+    return false;
+  }
+}