Test renamed crates in rustdoc

Author: kornelski

tests/rustdoc/extern/extern-html-alias.rs

@@ -0,0 +1,9 @@
+//@ compile-flags:-Z unstable-options --extern-html-root-url externs_name=https://renamed.example.com  --extern-html-root-url empty=https://bad.invalid
+//@ aux-crate:externs_name=empty.rs
+//@ edition: 2018
+
+extern crate externs_name as renamed;
+
+//@ has extern_html_alias/index.html
+//@ has - '//a/@href' 'https://renamed.example.com/empty/index.html'
+pub use renamed as yet_different_name;

tests/rustdoc/extern/extern-html-fallback.rs

@@ -0,0 +1,14 @@
+//@ compile-flags:-Z unstable-options --extern-html-root-url yet_another_name=https://bad.invalid --extern-html-root-url renamed_privately=https://bad.invalid --extern-html-root-url renamed_locally=https://bad.invalid --extern-html-root-url empty=https://localhost
+//@ aux-crate:externs_name=empty.rs
+//@ edition: 2018
+
+mod m {
+    pub extern crate externs_name as renamed_privately;
+}
+
+// renaming within the crate's source code is not supposed to affect CLI flags
+extern crate externs_name as renamed_locally;
+
+//@ has extern_html_fallback/index.html
+//@ has - '//a/@href' 'https://localhost/empty/index.html'
+pub use crate::renamed_locally as yet_another_name;