add passphrase_cache test

passphrase_cache.cc

@@ -4,11 +4,10 @@ namespace pEp {
     void PassphraseCache::add(std::string passphrase)
     {
         std::lock_guard<std::mutex> lock(_mtx);
-        cleanup();
         _cache.push_back({passphrase, clock::now()});
     }
 
-    bool PassphraseCache::for_each_passphrase(passphrase_callee& callee)
+    bool PassphraseCache::for_each_passphrase(const passphrase_callee& callee)
     {
         std::lock_guard<std::mutex> lock(_mtx);
         cleanup();
@@ -23,12 +22,8 @@ namespace pEp {
 
     void PassphraseCache::cleanup()
     {
-        for (auto entry = _cache.begin(); entry != _cache.end(); ) {
-            if (entry->tp < clock::now() - _timeout)
-                _cache.erase(entry);
-            else
-                break;
-        }
+        while (!_cache.empty() && _cache.front().tp < clock::now() - _timeout)
+            _cache.pop_front();
     }
 };
 

passphrase_cache.hh

@@ -35,7 +35,7 @@ namespace pEp {
         // matching passphrase or no passphrases are left
         // returns true if a passphrase was matching, false otherwise
         using passphrase_callee = std::function<bool(std::string)>;
-        bool for_each_passphrase(passphrase_callee& callee);
+        bool for_each_passphrase(const passphrase_callee& callee);
 
     protected:
         void cleanup();

test/Makefile

@@ -6,7 +6,7 @@ CXXFLAGS+=-I../
 
 .PHONY=all, test_adapter, test_adapter_cxx, test_library
 
-all: test_adapter test_adapter_cxx test_library
+all: test_adapter test_adapter_cxx test_library test_passphrase_cache
 
 test_adapter: test_adapter.cc ../libpEpAdapter.a
 
@@ -14,6 +14,8 @@ test_adapter_cxx: test_adapter_cxx.cc ../libpEpAdapter.a
 
 test_library: test_library.cc ../libpEpAdapter.a
 
+test_passphrase_cache: test_passphrase_cache.cc ../libpEpAdapter.a
+
 clean:	
 	rm -vf test_adapter
 	rm -rvf test_adapter.dSYM

test/test_passphrase_cache.cc

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <unistd.h>
+#include <assert.h>
+
+#include "passphrase_cache.hh"
+
+int main()
+{
+    pEp::PassphraseCache cache{std::chrono::seconds(1)};
+    cache.add("hello");
+    cache.add("world");
+
+    std::cout << "expected: two passphrases\n";
+    cache.for_each_passphrase([&](std::string passphrase){std::cout << passphrase << "\n"; return false;});
+
+    std::cout << "expected: one passphrase\n";
+    cache.for_each_passphrase([&](std::string passphrase){std::cout << passphrase << "\n"; return true;});
+
+    sleep(2);
+
+    std::cout << "expected: no passphrase\n";
+    cache.for_each_passphrase([&](std::string passphrase){std::cout << passphrase << "\n"; return false;});
+
+    return 0;
+}
+