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Add tests for ViewStack.swap()

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Leon Henrik Plickat 2020-10-26 20:40:40 +01:00 committed by Isaac Freund
parent 0c7b0de297
commit 5407325400
1 changed files with 41 additions and 0 deletions
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41
river/view_stack.zig
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@ -442,4 +442,45 @@ test "iteration (View)" {
testing.expect(it.next() == &five_b.view);
testing.expect(it.next() == null);
}
// Swap, then iterate
{
var view_a = views.first orelse unreachable;
var view_b = view_a.next orelse unreachable;
ViewStack(View).swap(&views, view_a, view_b); // {2, 5, 4, 1, 3} -> {5, 2, 4, 1, 3}
view_a = views.last orelse unreachable;
view_b = view_a.prev orelse unreachable;
ViewStack(View).swap(&views, view_a, view_b); // {5, 2, 4, 1, 3} -> {5, 2, 4, 3, 1}
view_a = views.last orelse unreachable;
view_b = views.first orelse unreachable;
ViewStack(View).swap(&views, view_a, view_b); // {5, 2, 4, 3, 1} -> {1, 2, 4, 3, 5}
view_a = views.first orelse unreachable;
view_b = views.last orelse unreachable;
ViewStack(View).swap(&views, view_a, view_b); // {1, 2, 4, 3, 5} -> {5, 2, 4, 3, 1}
view_a = views.first orelse unreachable;
view_a = view_a.next orelse unreachable;
view_b = view_a.next orelse unreachable;
view_b = view_b.next orelse unreachable;
ViewStack(View).swap(&views, view_a, view_b); // {5, 2, 4, 3, 1} -> {5, 3, 4, 2, 1}
var it = ViewStack(View).iter(views.first, .forward, {}, filters.all);
testing.expect(it.next() == &five_b.view);
testing.expect(it.next() == &three_b_pa.view);
testing.expect(it.next() == &four_b.view);
testing.expect(it.next() == &two_a.view);
testing.expect(it.next() == &one_a_pb.view);
testing.expect(it.next() == null);
it = ViewStack(View).iter(views.last, .reverse, {}, filters.all);
testing.expect(it.next() == &one_a_pb.view);
testing.expect(it.next() == &two_a.view);
testing.expect(it.next() == &four_b.view);
testing.expect(it.next() == &three_b_pa.view);
testing.expect(it.next() == &five_b.view);
testing.expect(it.next() == null);
}
}