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LibWeb: Don't assert when calling navigation properties

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The invariants for these property getters are supposed to be checked by
the has_entries_and_events_disabled AO, but we don't have all the
plumbing hooked up between Navigables and Navigation yet.

Add a test to make sure that these methods don't assert when calling
them on a fresh page.
This commit is contained in:
Andrew Kaster 2023-08-25 23:34:27 -06:00 • committed by Sam Atkins
parent aae7905369
commit 587cfa7739
3 changed files with 32 additions and 6 deletions
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5
Tests/LibWeb/Text/expected/HTML/Navigation-object-properties.txt Normal file
View file

@ -0,0 +1,5 @@
entries is empty: true
currentEntry is null: true
transition is null: true
canGoBack: false
canGoForward: false

15
Tests/LibWeb/Text/input/HTML/Navigation-object-properties.html Normal file
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@ -0,0 +1,15 @@
<script src="../include.js"></script>
<script>
test(() => {
let n = window.navigation;
// FIXME: Once we set up the interaction between Navigables and Navigation,
// These two should become 1 and [object NavigationHistoryEntry], respectively
println(`entries is empty: ${n.entries().length == 0}`);
println(`currentEntry is null: ${n.currentEntry == null}`);
println(`transition is null: ${n.transition == null}`);
println(`canGoBack: ${n.canGoBack}`);
println(`canGoForward: ${n.canGoForward}`);
});
</script>

18
Userland/Libraries/LibWeb/HTML/Navigation.cpp
View file

@ -105,8 +105,10 @@ JS::GCPtr<NavigationHistoryEntry> Navigation::current_entry() const
if (has_entries_and_events_disabled())
return nullptr;
// 2. Assert: navigation's current entry index is not −1.
VERIFY(m_current_entry_index != -1);
// FIXME 2. Assert: navigation's current entry index is not −1.
// FIXME: This should not happen once Navigable's algorithms properly set up NHEs.
if (m_current_entry_index == -1)
return nullptr;
// 3. Return navigation's entry list[navigation's current entry index].
return m_entry_list[m_current_entry_index];
@ -149,8 +151,10 @@ bool Navigation::can_go_back() const
if (has_entries_and_events_disabled())
return false;
// 2. Assert: this's current entry index is not −1.
VERIFY(m_current_entry_index != -1);
// FIXME 2. Assert: navigation's current entry index is not −1.
// FIXME: This should not happen once Navigable's algorithms properly set up NHEs.
if (m_current_entry_index == -1)
return false;
// 3. If this's current entry index is 0, then return false.
// 4. Return true.
@ -166,8 +170,10 @@ bool Navigation::can_go_forward() const
if (has_entries_and_events_disabled())
return false;
// 2. Assert: this's current entry index is not −1.
VERIFY(m_current_entry_index != -1);
// FIXME 2. Assert: navigation's current entry index is not −1.
// FIXME: This should not happen once Navigable's algorithms properly set up NHEs.
if (m_current_entry_index == -1)
return false;
// 3. If this's current entry index is equal to this's entry list's size, then return false.
// 4. Return true.