Add tests

src/librustdoc/html/markdown.rs

@@ -585,6 +585,7 @@ fn t(s: &str,
     fn issue_17736() {
         let markdown = "# title";
         format!("{}", Markdown(markdown));
+        reset_ids();
     }
 
     #[test]
@@ -609,6 +610,32 @@ fn t(input: &str, expect: &str) {
           <em><code>baz</code></em> ❤ #qux</a></h4>");
     }
 
+    #[test]
+    fn test_header_ids_multiple_blocks() {
+        fn t(input: &str, expect: &str) {
+            let output = format!("{}", Markdown(input));
+            assert_eq!(output, expect);
+        }
+
+        let test = || {
+            t("# Example", "\n<h1 id='example' class='section-header'>\
+              <a href='#example'>Example</a></h1>");
+            t("# Panics", "\n<h1 id='panics' class='section-header'>\
+              <a href='#panics'>Panics</a></h1>");
+            t("# Example", "\n<h1 id='example-1' class='section-header'>\
+              <a href='#example-1'>Example</a></h1>");
+            t("# Main", "\n<h1 id='main-1' class='section-header'>\
+              <a href='#main-1'>Main</a></h1>");
+            t("# Example", "\n<h1 id='example-2' class='section-header'>\
+              <a href='#example-2'>Example</a></h1>");
+            t("# Panics", "\n<h1 id='panics-1' class='section-header'>\
+              <a href='#panics-1'>Panics</a></h1>");
+        };
+        test();
+        reset_ids();
+        test();
+    }
+
     #[test]
     fn test_plain_summary_line() {
         fn t(input: &str, expect: &str) {

src/librustdoc/html/render.rs

@@ -2708,3 +2708,22 @@ fn get_index_type_name(clean_type: &clean::Type) -> Option<String> {
 pub fn cache() -> Arc<Cache> {
     CACHE_KEY.with(|c| c.borrow().clone())
 }
+
+#[cfg(test)]
+#[test]
+fn test_unique_id() {
+    let input = ["foo", "examples", "examples", "method.into_iter","examples",
+                 "method.into_iter", "foo", "main", "search", "methods",
+                 "examples", "method.into_iter", "assoc_type.Item", "assoc_type.Item"];
+    let expected = ["foo", "examples", "examples-1", "method.into_iter", "examples-2",
+                    "method.into_iter-1", "foo-1", "main-1", "search-1", "methods-1",
+                    "examples-3", "method.into_iter-2", "assoc_type.Item", "assoc_type.Item-1"];
+
+    let test = || {
+        let actual: Vec<String> = input.iter().map(|s| derive_id(s.to_string())).collect();
+        assert_eq!(&actual[..], expected);
+    };
+    test();
+    reset_ids();
+    test();
+}

src/test/rustdoc/issue-25001.rs

@@ -0,0 +1,53 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// @has issue_25001/struct.Foo.html
+pub struct Foo<T>(T);
+
+pub trait Bar {
+    type Item;
+
+    fn quux(self);
+}
+
+impl<T> Foo<T> {
+    // @has - '//*[@id="method.pass"]//code' 'fn pass()'
+    pub fn pass() {}
+}
+impl<T> Foo<T> {
+    // @has - '//*[@id="method.pass-1"]//code' 'fn pass() -> usize'
+    pub fn pass() -> usize { 42 }
+}
+impl<T> Foo<T> {
+    // @has - '//*[@id="method.pass-2"]//code' 'fn pass() -> isize'
+    pub fn pass() -> isize { 42 }
+}
+
+impl<T> Bar for Foo<T> {
+    // @has - '//*[@id="assoc_type.Item"]//code' 'type Item = T'
+    type Item=T;
+
+    // @has - '//*[@id="method.quux"]//code' 'fn quux(self)'
+    fn quux(self) {}
+}
+impl<'a, T> Bar for &'a Foo<T> {
+    // @has - '//*[@id="assoc_type.Item-1"]//code' "type Item = &'a T"
+    type Item=&'a T;
+
+    // @has - '//*[@id="method.quux-1"]//code' 'fn quux(self)'
+    fn quux(self) {}
+}
+impl<'a, T> Bar for &'a mut Foo<T> {
+    // @has - '//*[@id="assoc_type.Item-2"]//code' "type Item = &'a mut T"
+    type Item=&'a mut T;
+
+    // @has - '//*[@id="method.quux-2"]//code' 'fn quux(self)'
+    fn quux(self) {}
+}

src/test/rustdoc/issue-29449.rs

@@ -0,0 +1,30 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// @has issue_29449/struct.Foo.html
+pub struct Foo;
+
+impl Foo {
+    // @has - '//*[@id="examples"]//a' 'Examples'
+    // @has - '//*[@id="panics"]//a' 'Panics'
+    /// # Examples
+    /// # Panics
+    pub fn bar() {}
+
+    // @has - '//*[@id="examples-1"]//a' 'Examples'
+    /// # Examples
+    pub fn bar_1() {}
+
+    // @has - '//*[@id="examples-2"]//a' 'Examples'
+    // @has - '//*[@id="panics-1"]//a' 'Panics'
+    /// # Examples
+    /// # Panics
+    pub fn bar_2() {}
+}