+// Sanity checks for the Navigation Timing API |navigationStart| override. We
+// are asserting only most basic constraints, as TimeTicks (passed as the
+// override) are not comparable with the wall time (returned by the Blink API).
+TEST_F(RenderViewImplTest, NavigationStartOverride) {
+ // Verify that a navigation that claims to have started at the earliest
+ // possible TimeTicks is indeed reported as one that started before
+ // OnNavigate() is called.
+ base::Time before_navigation = base::Time::Now();
+ FrameMsg_Navigate_Params early_nav_params;
+ early_nav_params.url = GURL("data:text/html,<div>Page</div>");
+ early_nav_params.navigation_type = FrameMsg_Navigate_Type::NORMAL;
+ early_nav_params.transition = PAGE_TRANSITION_TYPED;
+ early_nav_params.page_id = -1;
+ early_nav_params.is_post = true;
+ early_nav_params.browser_navigation_start =
+ base::TimeTicks::FromInternalValue(1);
+
+ frame()->OnNavigate(early_nav_params);
+ ProcessPendingMessages();
+
+ base::Time early_nav_reported_start =
+ base::Time::FromDoubleT(GetMainFrame()->performance().navigationStart());
+ EXPECT_LT(early_nav_reported_start, before_navigation);
+
+ // Verify that a navigation that claims to have started in the future - 42
+ // days from now is *not* reported as one that starts in the future; as we
+ // sanitize the override allowing a maximum of ::Now().
+ FrameMsg_Navigate_Params late_nav_params;
+ late_nav_params.url = GURL("data:text/html,<div>Another page</div>");
+ late_nav_params.navigation_type = FrameMsg_Navigate_Type::NORMAL;
+ late_nav_params.transition = PAGE_TRANSITION_TYPED;
+ late_nav_params.page_id = -1;
+ late_nav_params.is_post = true;
+ late_nav_params.browser_navigation_start =
+ base::TimeTicks::Now() + base::TimeDelta::FromDays(42);
+
+ frame()->OnNavigate(late_nav_params);
+ ProcessPendingMessages();
+ base::Time after_navigation =
+ base::Time::Now() + base::TimeDelta::FromDays(1);
+
+ base::Time late_nav_reported_start =
+ base::Time::FromDoubleT(GetMainFrame()->performance().navigationStart());
+ EXPECT_LE(late_nav_reported_start, after_navigation);
+}
+