Clear environment variables for nacl_helper

components/nacl/zygote/nacl_fork_delegate_linux_unittest.cc

Index: components/nacl/zygote/nacl_fork_delegate_linux_unittest.cc
diff --git a/components/nacl/zygote/nacl_fork_delegate_linux_unittest.cc b/components/nacl/zygote/nacl_fork_delegate_linux_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..26d787a6f63e514cb0248112875168478ed76b78
--- /dev/null
+++ b/components/nacl/zygote/nacl_fork_delegate_linux_unittest.cc
@@ -0,0 +1,41 @@
+

[jln (very slow on Chromium), 2014/06/02 21:31:47]

Style: no empty line here.

[Mark Seaborn, 2014/06/02 23:10:29]

Nit: remove empty line at start

[elijahtaylor1, 2014/06/03 20:47:54]

Done.

[elijahtaylor1, 2014/06/03 20:47:55]

Done.

+// Copyright 2014 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 "components/nacl/zygote/nacl_fork_delegate_linux.h"

[jln (very slow on Chromium), 2014/06/02 21:31:47]

Nit: empty line after including the interface that you're testing.

[elijahtaylor1, 2014/06/03 20:47:55]

Done.

+#include "base/environment.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/process/launch.h"
+#include "testing/gtest/include/gtest/gtest.h"
+

[jln (very slow on Chromium), 2014/06/02 21:31:47]

Nit: add an anonymous namespace.

[elijahtaylor1, 2014/06/03 20:47:55]

I don't know if that's possible since we need to make this test class a friend
of NaClForkDelegate.  What's the reason you want it in a namespace?  I thought
we wouldn't care so much since this is just compiled into components_unittests. 
I could put it in the nacl namespace if it's still a concern

[jln (very slow on Chromium), 2014/06/03 22:58:13]

Yeah, probably a good idea to have it in the nacl namespace at least. It will
save you nacl:: below as well.

+TEST(NaClForkDelegateLinuxTest, EnvPassthrough) {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  const char passthrough1[] = "HELPER_PASSTHROUGH1";
+  const char passthrough2[] = "HELPER_PASSTHROUGH2";
+  const char passthrough3[] = "HELPER_PASSTHROUGH3";
+  const char passthrough4[] = "HELPER_PASSTHROUGH4";
+  const char value1[] = "passthrough_value1";
+  const char value3[] = "passthrough_value3";
+  const char value4[] = "passthrough_value4";
+  std::string passthrough_value;
+  passthrough_value += passthrough1;
+  passthrough_value += " ";
+  passthrough_value += passthrough2;
+  passthrough_value += " ";
+  passthrough_value += passthrough3;
+  // Not adding passthrough4 to the passthrough variable.
+  env->SetVar("NACL_DANGEROUS_NACL_HELPER_ENV_PASSTHROUGH",
+              passthrough_value.c_str());
+  env->SetVar(passthrough1, value1);
+  // Intentionally skip setting a value for passthrough2.
+  env->SetVar(passthrough3, value3);
+  env->SetVar(passthrough4, value4);
+
+  base::LaunchOptions options;
+  nacl::NaClForkDelegate::AddPassthroughEnvToOptions(options);
+  EXPECT_EQ(value1, options.environ[passthrough1]);
+  EXPECT_EQ(0U, options.environ.count(passthrough2));
+  EXPECT_EQ(value3, options.environ[passthrough3]);
+  EXPECT_EQ(0U, options.environ.count(passthrough4));
+}