add test

Author: jhgg

crates/ide/src/syntax_highlighting/test_data/highlighting.html

@@ -265,4 +265,13 @@
 <span class="brace">}</span>
 <span class="keyword">const</span> <span class="constant declaration">USAGE_OF_BOOL</span><span class="colon">:</span><span class="builtin_type">bool</span> <span class="operator">=</span> <span class="enum public">Bool</span><span class="operator">::</span><span class="enum_variant public">True</span><span class="operator">.</span><span class="function associated consuming public">to_primitive</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 
+<span class="keyword">trait</span> <span class="trait declaration">Baz</span> <span class="brace">{</span>
+    <span class="keyword">type</span> <span class="type_alias associated declaration trait">Qux</span><span class="semicolon">;</span>
+<span class="brace">}</span>
+
+<span class="keyword">fn</span> <span class="function declaration">baz</span><span class="angle">&lt;</span><span class="type_param declaration">T</span><span class="angle">&gt;</span><span class="parenthesis">(</span><span class="value_param declaration">t</span><span class="colon">:</span> <span class="type_param">T</span><span class="parenthesis">)</span>
+<span class="keyword">where</span>
+    <span class="type_param">T</span><span class="colon">:</span> <span class="trait">Baz</span><span class="comma">,</span>
+    <span class="angle">&lt;</span><span class="type_param">T</span> <span class="keyword">as</span> <span class="trait">Baz</span><span class="angle">&gt;</span><span class="operator">::</span><span class="type_alias associated trait">Qux</span><span class="colon">:</span> <span class="trait">Bar</span> <span class="brace">{</span><span class="brace">}</span>
+
 </code></pre>

crates/ide/src/syntax_highlighting/tests.rs

@@ -238,6 +238,15 @@ impl Bool {
 }
 const USAGE_OF_BOOL:bool = Bool::True.to_primitive();
 
+trait Baz {
+    type Qux;
+}
+
+fn baz<T>(t: T)
+where
+    T: Baz,
+    <T as Baz>::Qux: Bar {}
+
 //- /foo.rs crate:foo
 pub struct Person {
     pub name: &'static str,