Refactored ErrorCode into it's own class

sandbox/linux/seccomp-bpf/errorcode_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sandbox/linux/seccomp-bpf/sandbox_bpf.h"
+#include "sandbox/linux/tests/unit_tests.h"
+
+using namespace playground2;
+
+namespace {
+
+SANDBOX_TEST(ErrorCode, ErrnoConstructor) {
+  ErrorCode e0;
+  SANDBOX_ASSERT(e0.err() == SECCOMP_RET_INVALID);
+
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  SANDBOX_ASSERT(e1.err() == SECCOMP_RET_ALLOW);
+
+  ErrorCode e2(EPERM);
+  SANDBOX_ASSERT(e2.err() == SECCOMP_RET_ERRNO + EPERM);
+
+  SANDBOX_ASSERT_DEATH(ErrorCode e3(-1), "Invalid use of ErrorCode object");
+
+  ErrorCode e3 = Sandbox::Trap(NULL, NULL);
+  SANDBOX_ASSERT((e3.err() & SECCOMP_RET_ACTION)  == SECCOMP_RET_TRAP);
+
+  return true;
+}
+
+SANDBOX_TEST(ErrorCode, Trap) {
+  ErrorCode e0 = Sandbox::Trap(NULL, "a");
+  ErrorCode e1 = Sandbox::Trap(NULL, "b");
+  SANDBOX_ASSERT((e0.err() & SECCOMP_RET_DATA) + 1 ==
+                 (e1.err() & SECCOMP_RET_DATA));
+
+  ErrorCode e2 = Sandbox::Trap(NULL, "a");
+  SANDBOX_ASSERT((e0.err() & SECCOMP_RET_DATA) ==
+                 (e2.err() & SECCOMP_RET_DATA));
+
+  return true;
+}
+
+SANDBOX_TEST(ErrorCode, Equals) {
+  ErrorCode e0;
+  SANDBOX_ASSERT_DEATH(e0.Equals(e0), "Dereferencing invalid ErrorCode");
+
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  ErrorCode e2(ErrorCode::ERR_ALLOWED);
+  SANDBOX_ASSERT(e1.Equals(e1));
+  SANDBOX_ASSERT(e1.Equals(e2));
+  SANDBOX_ASSERT(e2.Equals(e1));
+
+  ErrorCode e3(EPERM);
+  SANDBOX_ASSERT(!e1.Equals(e3));
+
+  ErrorCode e4 = Sandbox::Trap(NULL, "a");
+  ErrorCode e5 = Sandbox::Trap(NULL, "b");
+  ErrorCode e6 = Sandbox::Trap(NULL, "a");
+  SANDBOX_ASSERT(!e1.Equals(e4));
+  SANDBOX_ASSERT(!e3.Equals(e4));
+  SANDBOX_ASSERT(!e5.Equals(e4));
+  SANDBOX_ASSERT( e6.Equals(e4));
+
+  return true;
+}
+
+SANDBOX_TEST(ErrorCode, LessThan) {
+  ErrorCode e0;
+  SANDBOX_ASSERT_DEATH(e0.LessThan(e0), "Dereferencing invalid ErrorCode");
+
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  ErrorCode e2(ErrorCode::ERR_ALLOWED);
+  SANDBOX_ASSERT(!e1.LessThan(e1));
+  SANDBOX_ASSERT(!e1.LessThan(e2));
+  SANDBOX_ASSERT(!e2.LessThan(e1));
+
+  ErrorCode e3(EPERM);
+  SANDBOX_ASSERT(!e1.LessThan(e3));
+  SANDBOX_ASSERT( e3.LessThan(e1));
+
+  ErrorCode e4 = Sandbox::Trap(NULL, "a");
+  ErrorCode e5 = Sandbox::Trap(NULL, "b");
+  ErrorCode e6 = Sandbox::Trap(NULL, "a");
+  SANDBOX_ASSERT(e1.LessThan(e4));
+  SANDBOX_ASSERT(e3.LessThan(e4));
+  SANDBOX_ASSERT(e4.LessThan(e5));
+  SANDBOX_ASSERT(!e4.LessThan(e6));
+  SANDBOX_ASSERT(!e6.LessThan(e4));
+
+  return true;
+}
+
+} // namespace