Add regression test for rust-lang#120471 to ensure that long crate name are handled as expected on mobile

Author: GuillaumeGomez

tests/rustdoc-gui/mobile-crate-name.goml

@@ -0,0 +1,23 @@
+// Checks that if the crate name is too long on mobile, it will not grow and overflow its parent
+// (thanks to text overflow ellipsis).
+
+go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
+// First we change the title to make it big.
+set-window-size: (350, 800)
+// We ensure that the "format" of the title is the same as the one we'll use.
+assert-text: (".mobile-topbar .location", "Crate test_docs")
+// We store the height we know is correct.
+store-property: (".mobile-topbar .location", {"offsetHeight": height})
+// We change the crate name to something longer.
+set-text: (".mobile-topbar .location", "Crate cargo_packager_resource_resolver")
+// And we check that the size remained the same.
+assert-property: (".mobile-topbar .location", {"offsetHeight": |height|})
+
+// Now we check if it works for the non-crate pages as well.
+go-to: "file://" + |DOC_PATH| + "/test_docs/struct.Foo.html"
+// We store the height we know is correct.
+store-property: (".mobile-topbar .location", {"offsetHeight": height})
+// We change the crate name to something longer (we need to change the link text here).
+set-text: (".mobile-topbar .location a", "Something_incredibly_long_because")
+// And we check that the size remained the same.
+assert-property: (".mobile-topbar .location", {"offsetHeight": |height|})

tests/rustdoc-gui/type-declation-overflow.goml

@@ -39,8 +39,8 @@ assert-property: ("pre.item-decl", {"scrollWidth": "950"})
 set-window-size: (600, 600)
 go-to: "file://" + |DOC_PATH| + "/lib2/too_long/struct.SuperIncrediblyLongLongLongLongLongLongLongGigaGigaGigaMegaLongLongLongStructName.html"
 // It shouldn't have an overflow in the topbar either.
-store-property: (".mobile-topbar h2", {"scrollWidth": scrollWidth})
-assert-property: (".mobile-topbar h2", {"clientWidth": |scrollWidth|})
+store-property: (".mobile-topbar", {"scrollWidth": scrollWidth})
+assert-property: (".mobile-topbar", {"clientWidth": |scrollWidth|})
 assert-css: (".mobile-topbar h2", {"overflow-x": "hidden"})
 
 // Check wrapping for top main-heading h1 and out-of-band.