more completion components

crates/ra_analysis/src/completion/complete_snippet.rs

@@ -0,0 +1,78 @@
+use crate::{
+    completion::{CompletionItem, Completions, CompletionKind::*, SyntaxContext},
+};
+
+pub(super) fn complete_expr_snippet(acc: &mut Completions, ctx: &SyntaxContext) {
+    if !(ctx.is_trivial_path && ctx.enclosing_fn.is_some()) {
+        return;
+    }
+    CompletionItem::new("pd")
+        .snippet("eprintln!(\"$0 = {:?}\", $0);")
+        .kind(Snippet)
+        .add_to(acc);
+    CompletionItem::new("ppd")
+        .snippet("eprintln!(\"$0 = {:#?}\", $0);")
+        .kind(Snippet)
+        .add_to(acc);
+}
+
+pub(super) fn complete_item_snippet(acc: &mut Completions, ctx: &SyntaxContext) {
+    if !ctx.is_new_item {
+        return;
+    }
+    CompletionItem::new("Test function")
+        .lookup_by("tfn")
+        .snippet(
+            "\
+#[test]
+fn ${1:feature}() {
+    $0
+}",
+        )
+        .kind(Snippet)
+        .add_to(acc);
+    CompletionItem::new("pub(crate)")
+        .snippet("pub(crate) $0")
+        .kind(Snippet)
+        .add_to(acc);
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::completion::{CompletionKind, check_completion};
+    fn check_snippet_completion(code: &str, expected_completions: &str) {
+        check_completion(code, expected_completions, CompletionKind::Snippet);
+    }
+
+    #[test]
+    fn completes_snippets_in_expressions() {
+        check_snippet_completion(
+            r"fn foo(x: i32) { <|> }",
+            r##"
+            pd "eprintln!(\"$0 = {:?}\", $0);"
+            ppd "eprintln!(\"$0 = {:#?}\", $0);"
+            "##,
+        );
+    }
+
+    #[test]
+    fn completes_snippets_in_items() {
+        // check_snippet_completion(r"
+        //     <|>
+        //     ",
+        //     r##"[CompletionItem { label: "Test function", lookup: None, snippet: Some("#[test]\nfn test_${1:feature}() {\n$0\n}"##,
+        // );
+        check_snippet_completion(
+            r"
+            #[cfg(test)]
+            mod tests {
+                <|>
+            }
+            ",
+            r##"
+            tfn "Test function" "#[test]\nfn ${1:feature}() {\n    $0\n}"
+            pub(crate) "pub(crate) $0"
+            "##,
+        );
+    }
+}