Unify crate pages style

Author: GuillaumeGomez

crates/bin/docs_rs_web/templates/crate/builds.html

@@ -9,10 +9,6 @@
 <link rel="canonical" href="{{ canonical_url|safe }}" />
 {%- endblock -%}
 
-{%- block body_classes -%}
-    centered
-{%- endblock body_classes -%}
-
 {%- block topbar -%}
   {%- include "rustdoc/topbar.html" -%}
 {%- endblock topbar -%}

gui-tests/crate-pages.goml

@@ -0,0 +1,32 @@
+// Checks that the "crate pages" have all the same style (ie: not centered).
+go-to: |DOC_PATH| + "/crate/sysinfo"
+
+store-value: (tabs_menu_selector, ".description-container .pure-menu-horizontal ul.pure-menu-list")
+store-value: (current_tab, 1)
+
+define-function: (
+    "check-tab",
+    [tab_name, click_next],
+    block {
+        // We check the tab's name is the one expected.
+        assert-text: (|tabs_menu_selector| + " > li a.pure-menu-active .title", |tab_name|)
+        // We check it also matches the one we clicked.
+        assert: |tabs_menu_selector| + " > li:nth-of-type(" + |current_tab| + ") a.pure-menu-active"
+        // We ensure that the content of the page is not centered.
+        assert: "body:not(.centered)"
+        assert-css: ("div.container", {"margin": "0px"})
+        if: (|click_next|, block {
+            store-value: (current_tab, |current_tab| + 1)
+            click: |tabs_menu_selector| + " > li:nth-of-type(" + |current_tab| + ")"
+        })
+    }
+)
+
+// If this assert fails, it means we added new entries for this menu so this test needs to be
+// updated.
+assert-count: (|tabs_menu_selector| + " > li", 4)
+
+call-function: ("check-tab", {"tab_name": " Crate", "click_next": true})
+call-function: ("check-tab", {"tab_name": " Source", "click_next": true})
+call-function: ("check-tab", {"tab_name": " Builds", "click_next": true})
+call-function: ("check-tab", {"tab_name": "Feature flags", "click_next": false})