Add GUI test for item info elements color

Author: GuillaumeGomez

tests/rustdoc-gui/item-info.goml

@@ -45,3 +45,26 @@ compare-elements-css: (
     "#main-content > .item-info .stab:nth-of-type(2)",
     ["height"],
 )
+
+// Now checking the text color and the links color.
+show-text: true
+include: "utils.goml"
+go-to: "file://" + |DOC_PATH| + "/lib2/trait.Trait.html"
+
+call-function: ("switch-theme", {"theme": "ayu"})
+assert-css: (".item-info .stab", {"color": "rgb(197, 197, 197)"}, ALL)
+assert-css: (".item-info .stab strong", {"color": "rgb(197, 197, 197)"}, ALL)
+assert-css: (".item-info .stab span", {"color": "rgb(197, 197, 197)"}, ALL)
+assert-css: (".item-info .stab a", {"color": "rgb(57, 175, 215)"}, ALL)
+
+call-function: ("switch-theme", {"theme": "dark"})
+assert-css: (".item-info .stab", {"color": "rgb(221, 221, 221)"}, ALL)
+assert-css: (".item-info .stab strong", {"color": "rgb(221, 221, 221)"}, ALL)
+assert-css: (".item-info .stab span", {"color": "rgb(221, 221, 221)"}, ALL)
+assert-css: (".item-info .stab a", {"color": "rgb(210, 153, 29)"}, ALL)
+
+call-function: ("switch-theme", {"theme": "light"})
+assert-css: (".item-info .stab", {"color": "rgb(0, 0, 0)"}, ALL)
+assert-css: (".item-info .stab strong", {"color": "rgb(0, 0, 0)"}, ALL)
+assert-css: (".item-info .stab span", {"color": "rgb(0, 0, 0)"}, ALL)
+assert-css: (".item-info .stab a", {"color": "rgb(56, 115, 173)"}, ALL)