Add tests for FeaturePolicy integration with RenderFrameHost

content/browser/frame_host/render_frame_host_feature_policy_unittest.cc

Index: content/browser/frame_host/render_frame_host_feature_policy_unittest.cc
diff --git a/content/browser/frame_host/render_frame_host_feature_policy_unittest.cc b/content/browser/frame_host/render_frame_host_feature_policy_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9fcd05a48c0306bc35d8b7541e2bde98c8729a9c
--- /dev/null
+++ b/content/browser/frame_host/render_frame_host_feature_policy_unittest.cc
@@ -0,0 +1,172 @@
+// Copyright 2017 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 <vector>
+
+#include "content/common/feature_policy/feature_policy.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/test/test_renderer_host.h"
+#include "content/test/test_render_frame_host.h"
+#include "third_party/WebKit/public/platform/WebFeaturePolicyFeature.h"
+#include "third_party/WebKit/public/web/WebSandboxFlags.h"
+#include "url/gurl.h"
+#include "url/origin.h"
+
+namespace content {
+
+// Integration tests for feature policy setup and querying through a RFH. These
+// tests are not meant to cover every edge case as the FeaturePolicy class
+// itself is tested thoroughly in feature_policy_unittest.cc. Instead they are
+// meant to ensure that integration with RenderFrameHost works correctly.
+class RenderFrameHostFeaturePolicyTest
+    : public content::RenderViewHostTestHarness {
+ protected:
+  static constexpr const char* kOrigin1 = "https://google.com";
+  static constexpr const char* kOrigin2 = "https://maps.google.com";
+  static constexpr const char* kOrigin3 = "https://example.com";
+  static constexpr const char* kOrigin4 = "https://test.com";
+
+  static const blink::WebFeaturePolicyFeature kDefaultEnabledFeature =
+      blink::WebFeaturePolicyFeature::kDocumentWrite;
+  static const blink::WebFeaturePolicyFeature kDefaultSelfFeature =
+      blink::WebFeaturePolicyFeature::kGeolocation;
+
+  RenderFrameHost* GetMainRFH(const char* origin) {
+    RenderFrameHost* result = web_contents()->GetMainFrame();
+    RenderFrameHostTester::For(result)->InitializeRenderFrameIfNeeded();
+    RenderFrameHostTester::For(result)->SimulateNavigationCommit(GURL(origin));
+    return result;
+  }
+
+  RenderFrameHost* AddChildRFH(RenderFrameHost* parent, const char* origin) {
+    RenderFrameHost* result =
+        RenderFrameHostTester::For(parent)->AppendChild("");
+    RenderFrameHostTester::For(result)->InitializeRenderFrameIfNeeded();
+    RenderFrameHostTester::For(result)->SimulateNavigationCommit(GURL(origin));
+    return result;
+  }
+
+  // The header policy should only be set once on page load, so we refresh the
+  // page to simulate that.
+  void RefreshPageAndSetHeaderPolicy(RenderFrameHost* rfh,
+                                     blink::WebFeaturePolicyFeature feature,
+                                     const std::vector<std::string>& origins) {
+    GURL last_url = rfh->GetLastCommittedURL();
+    RenderFrameHostTester::For(rfh)->SimulateNavigationCommit(
+        GURL("about:blank"));
+    RenderFrameHostTester::For(rfh)->SimulateNavigationCommit(last_url);
+    static_cast<TestRenderFrameHost*>(rfh)->OnDidSetFeaturePolicyHeader(
+        CreateFPHeader(feature, origins));
+  }
+
+  void SetContainerPolicy(RenderFrameHost* parent,
+                          RenderFrameHost* child,
+                          blink::WebFeaturePolicyFeature feature,
+                          const std::vector<std::string>& origins) {
+    static_cast<TestRenderFrameHost*>(parent)->OnDidChangeFramePolicy(
+        child->GetRoutingID(), blink::WebSandboxFlags(),
+        CreateFPHeader(feature, origins));
+  }
+
+ private:
+  ParsedFeaturePolicyHeader CreateFPHeader(
+      blink::WebFeaturePolicyFeature feature,
+      const std::vector<std::string>& origins) {
+    ParsedFeaturePolicyHeader result(1);
+    result[0].feature = feature;
+    result[0].matches_all_origins = false;
+    for (const std::string& origin : origins)
+      result[0].origins.push_back(url::Origin(GURL(origin)));
+    return result;
+  }
+};
+
+TEST_F(RenderFrameHostFeaturePolicyTest, DefaultPolicy) {
+  RenderFrameHost* parent = GetMainRFH(kOrigin1);
+  RenderFrameHost* child = AddChildRFH(parent, kOrigin2);
+
+  EXPECT_TRUE(parent->IsFeatureEnabled(kDefaultEnabledFeature));
+  EXPECT_TRUE(parent->IsFeatureEnabled(kDefaultSelfFeature));
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultEnabledFeature));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+}
+
+TEST_F(RenderFrameHostFeaturePolicyTest, HeaderPolicy) {
+  RenderFrameHost* parent = GetMainRFH(kOrigin1);
+
+  // Enable the feature for the child in the parent frame.
+  RefreshPageAndSetHeaderPolicy(parent, kDefaultSelfFeature,
+                                {kOrigin1, kOrigin2});
+
+  // Create the child.
+  RenderFrameHost* child = AddChildRFH(parent, kOrigin2);
+
+  EXPECT_TRUE(parent->IsFeatureEnabled(kDefaultSelfFeature));
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Set an empty whitelist in the child to test that the policies combine
+  // correctly.
+  RefreshPageAndSetHeaderPolicy(child, kDefaultSelfFeature, {});
+
+  EXPECT_TRUE(parent->IsFeatureEnabled(kDefaultSelfFeature));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Re-enable the feature in the child.
+  RefreshPageAndSetHeaderPolicy(child, kDefaultSelfFeature, {kOrigin2});
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Navigate the child. Check that the feature is disabled.
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin3));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+}
+
+TEST_F(RenderFrameHostFeaturePolicyTest, ContainerPolicy) {
+  RenderFrameHost* parent = GetMainRFH(kOrigin1);
+  RenderFrameHost* child = AddChildRFH(parent, kOrigin2);
+
+  // Set a container policy on origin 3 to give it the feature. It should not
+  // be enabled because container policy will only take effect after navigation.
+  SetContainerPolicy(parent, child, kDefaultSelfFeature, {kOrigin2, kOrigin3});
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Navigate the child so that the container policy takes effect.
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin3));
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Navigate the child again, the feature should not be enabled.
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin4));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+}
+
+TEST_F(RenderFrameHostFeaturePolicyTest, HeaderAndContainerPolicy) {
+  RenderFrameHost* parent = GetMainRFH(kOrigin1);
+
+  // Set a header policy and container policy. Check that they both take effect.
+  RefreshPageAndSetHeaderPolicy(parent, kDefaultSelfFeature,
+                                {kOrigin1, kOrigin2});
+
+  RenderFrameHost* child = AddChildRFH(parent, kOrigin2);
+  SetContainerPolicy(parent, child, kDefaultSelfFeature, {kOrigin3});
+
+  // The feature should be enabled in kOrigin2, kOrigin3 but not kOrigin4.
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultSelfFeature));
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin3));
+  EXPECT_TRUE(child->IsFeatureEnabled(kDefaultSelfFeature));
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin4));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+
+  // Change the header policy to turn off the feature. It should be disabled in
+  // all children.
+  RefreshPageAndSetHeaderPolicy(parent, kDefaultSelfFeature, {});
+  child = AddChildRFH(parent, kOrigin2);
+  SetContainerPolicy(parent, child, kDefaultSelfFeature, {kOrigin3});
+
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin2));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+  RenderFrameHostTester::For(child)->SimulateNavigationCommit(GURL(kOrigin3));
+  EXPECT_FALSE(child->IsFeatureEnabled(kDefaultSelfFeature));
+}
+
+}  // namespace content