8024: Added test case for highlighting trait items.

Author: chetankhilosiya

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

@@ -0,0 +1,67 @@
+
+<style>
+body                { margin: 0; }
+pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padding: 0.4em; }
+
+.lifetime           { color: #DFAF8F; font-style: italic; }
+.label              { color: #DFAF8F; font-style: italic; }
+.comment            { color: #7F9F7F; }
+.documentation      { color: #629755; }
+.intra_doc_link     { font-style: italic; }
+.injected           { opacity: 0.65 ; }
+.struct, .enum      { color: #7CB8BB; }
+.enum_variant       { color: #BDE0F3; }
+.string_literal     { color: #CC9393; }
+.field              { color: #94BFF3; }
+.function           { color: #93E0E3; }
+.function.unsafe    { color: #BC8383; }
+.operator.unsafe    { color: #BC8383; }
+.parameter          { color: #94BFF3; }
+.text               { color: #DCDCCC; }
+.type               { color: #7CB8BB; }
+.builtin_type       { color: #8CD0D3; }
+.type_param         { color: #DFAF8F; }
+.attribute          { color: #94BFF3; }
+.numeric_literal    { color: #BFEBBF; }
+.bool_literal       { color: #BFE6EB; }
+.macro              { color: #94BFF3; }
+.module             { color: #AFD8AF; }
+.value_param        { color: #DCDCCC; }
+.variable           { color: #DCDCCC; }
+.format_specifier   { color: #CC696B; }
+.mutable            { text-decoration: underline; }
+.escape_sequence    { color: #94BFF3; }
+.keyword            { color: #F0DFAF; font-weight: bold; }
+.keyword.unsafe     { color: #BC8383; font-weight: bold; }
+.control            { font-style: italic; }
+
+.unresolved_reference { color: #FC5555; text-decoration: wavy underline; }
+</style>
+<pre><code><span class="keyword">struct</span> <span class="struct declaration">Cat</span><span class="semicolon">;</span>
+
+<span class="keyword">trait</span> <span class="trait declaration">Animal</span> <span class="brace">{</span>
+    <span class="keyword">const</span> <span class="constant declaration associated trait">SOUND</span><span class="colon">:</span> <span class="operator">&</span><span class="lifetime">'static</span> <span class="builtin_type">str</span><span class="semicolon">;</span>
+
+    <span class="keyword">fn</span> <span class="function declaration associated trait">make_sound</span><span class="parenthesis">(</span><span class="operator">&</span><span class="self_keyword declaration">self</span><span class="parenthesis">)</span> <span class="brace">{</span>
+        <span class="macro">println!</span><span class="parenthesis">(</span><span class="string_literal">"{}"</span><span class="comma">,</span> Self<span class="colon">:</span><span class="colon">:</span>SOUND<span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="brace">}</span>
+<span class="brace">}</span>
+
+<span class="keyword">impl</span> <span class="trait">Animal</span> <span class="keyword">for</span> <span class="struct">Cat</span> <span class="brace">{</span>
+    <span class="keyword">const</span> <span class="constant declaration associated trait">SOUND</span><span class="colon">:</span> <span class="operator">&</span><span class="lifetime">'static</span> <span class="builtin_type">str</span> <span class="operator">=</span> <span class="string_literal">"Meow!"</span><span class="semicolon">;</span>
+<span class="brace">}</span>
+
+<span class="keyword">impl</span> <span class="struct">Cat</span> <span class="brace">{</span>
+    <span class="keyword">const</span> <span class="constant declaration associated">SPEED</span><span class="colon">:</span> <span class="builtin_type">u32</span> <span class="operator">=</span> <span class="numeric_literal">2</span><span class="semicolon">;</span>
+
+    <span class="keyword">fn</span> <span class="function declaration static associated">run</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span><span class="brace">}</span>
+<span class="brace">}</span>
+
+<span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
+    <span class="keyword">let</span> <span class="variable declaration">cat</span> <span class="operator">=</span> <span class="struct">Cat</span><span class="semicolon">;</span>
+    <span class="variable">cat</span><span class="operator">.</span><span class="function associated trait">make_sound</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable declaration">_sound</span> <span class="operator">=</span> <span class="struct">Cat</span><span class="operator">::</span><span class="constant associated trait">SOUND</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable declaration">_speed</span> <span class="operator">=</span> <span class="struct">Cat</span><span class="operator">::</span><span class="constant associated">SPEED</span><span class="semicolon">;</span>
+    <span class="struct">Cat</span><span class="operator">::</span><span class="function static associated">run</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+<span class="brace">}</span>
+</code></pre>

crates/ide/src/syntax_highlighting/tests.rs

@@ -659,6 +659,43 @@ fn foo() {
     );
 }
 
+#[test]
+fn test_highlight_trait_items() {
+    check_highlighting(
+        r#"
+struct Cat;
+
+trait Animal {
+    const SOUND: &'static str;
+
+    fn make_sound(&self) {
+        println!("{}", Self::SOUND);
+    }
+}
+
+impl Animal for Cat {
+    const SOUND: &'static str = "Meow!";
+}
+
+impl Cat {
+    const SPEED: u32 = 2;
+
+    fn run() {}
+}
+
+fn main() {
+    let cat = Cat;
+    cat.make_sound();
+    let _sound = Cat::SOUND;
+    let _speed = Cat::SPEED;
+    Cat::run();
+}
+"#,
+        expect_file!["./test_data/highlight_trait_items.html"],
+        false,
+    );
+}
+
 /// Highlights the code given by the `ra_fixture` argument, renders the
 /// result as HTML, and compares it with the HTML file given as `snapshot`.
 /// Note that the `snapshot` file is overwritten by the rendered HTML.