Add URL GUI tests

Author: GuillaumeGomez

Diff for: src/test/rustdoc-gui/escape-key.goml

@@ -6,23 +6,28 @@ write: (".search-input", "test")
 wait-for: "#search h1" // The search element is empty before the first search 
 assert-attribute: ("#search", {"class": "content"})
 assert-attribute: ("#main-content", {"class": "content hidden"})
+assert-document-property: ({"URL": "index.html?search=test"}, ENDS_WITH)
 press-key: "Escape"
 assert-attribute: ("#search", {"class": "content hidden"})
 assert-attribute: ("#main-content", {"class": "content"})
+assert-document-property: ({"URL": "index.html"}, [ENDS_WITH])
 
 // Check that focusing the search input brings back the search results
 focus: ".search-input"
 assert-attribute: ("#search", {"class": "content"})
 assert-attribute: ("#main-content", {"class": "content hidden"})
+assert-document-property: ({"URL": "index.html?search=test"}, ENDS_WITH)
 
 // Now let's check that when the help popup is displayed and we press Escape, it doesn't
 // hide the search results too.
 click: "#help-button"
+assert-document-property: ({"URL": "index.html?search=test"}, [ENDS_WITH])
 assert-attribute: ("#help", {"class": ""})
 press-key: "Escape"
 assert-attribute: ("#help", {"class": "hidden"})
 assert-attribute: ("#search", {"class": "content"})
 assert-attribute: ("#main-content", {"class": "content hidden"})
+assert-document-property: ({"URL": "index.html?search=test"}, [ENDS_WITH])
 
 // Check that Escape hides the search results when a search result is focused.
 focus: ".search-input"

Diff for: src/test/rustdoc-gui/search-filter.goml

@@ -15,6 +15,7 @@ press-key: "ArrowDown"
 press-key: "Enter"
 // Waiting for the search results to appear...
 wait-for: "#titles"
+assert-document-property: ({"URL": "&filter-crate="}, CONTAINS)
 // We check that there is no more "test_docs" appearing.
 assert-false: "#results .externcrate"
 // We also check that "lib2" is the filter crate.