1 files changed, 26 insertions, 9 deletions

diff --git a/crates/ra_syntax/src/ast/make.rs b/crates/ra_syntax/src/ast/make.rs
index 02966a3ff..862eb1172 100644
--- a/crates/ra_syntax/src/ast/make.rs
+++ b/crates/ra_syntax/src/ast/make.rs
@@ -33,6 +33,21 @@ pub fn record_field(name: ast::NameRef, expr: Option<ast::Expr>) -> ast::RecordF
     }
 }
 
+pub fn block_expr(
+    stmts: impl IntoIterator<Item = ast::Stmt>,
+    tail_expr: Option<ast::Expr>,
+) -> ast::BlockExpr {
+    let mut text = "{\n".to_string();
+    for stmt in stmts.into_iter() {
+        text += &format!("    {}\n", stmt.syntax());
+    }
+    if let Some(tail_expr) = tail_expr {
+        text += &format!("    {}\n", tail_expr.syntax())
+    }
+    text += "}";
+    ast_from_text(&format!("fn f() {}", text))
+}
+
 pub fn block_from_expr(e: ast::Expr) -> ast::Block {
     return from_text(&format!("{{ {} }}", e.syntax()));
 
@@ -62,6 +77,13 @@ pub fn expr_return() -> ast::Expr {
 pub fn expr_match(expr: ast::Expr, match_arm_list: ast::MatchArmList) -> ast::Expr {
     expr_from_text(&format!("match {} {}", expr.syntax(), match_arm_list.syntax()))
 }
+pub fn expr_if(condition: ast::Expr, then_branch: ast::BlockExpr) -> ast::Expr {
+    expr_from_text(&format!("if {} {}", condition.syntax(), then_branch.syntax()))
+}
+pub fn expr_prefix(op: SyntaxKind, expr: ast::Expr) -> ast::Expr {
+    let token = token(op);
+    expr_from_text(&format!("{}{}", token, expr.syntax()))
+}
 fn expr_from_text(text: &str) -> ast::Expr {
     ast_from_text(&format!("const C: () = {};", text))
 }
@@ -158,14 +180,6 @@ pub fn where_clause(preds: impl IntoIterator<Item = ast::WherePred>) -> ast::Whe
     }
 }
 
-pub fn if_expression(condition: ast::Expr, statement: &str) -> ast::IfExpr {
-    ast_from_text(&format!(
-        "fn f() {{ if !{} {{\n    {}\n}}\n}}",
-        condition.syntax().text(),
-        statement
-    ))
-}
-
 pub fn let_stmt(pattern: ast::Pat, initializer: Option<ast::Expr>) -> ast::LetStmt {
     let text = match initializer {
         Some(it) => format!("let {} = {};", pattern.syntax(), it.syntax()),
@@ -173,6 +187,9 @@ pub fn let_stmt(pattern: ast::Pat, initializer: Option<ast::Expr>) -> ast::LetSt
     };
     ast_from_text(&format!("fn f() {{ {} }}", text))
 }
+pub fn expr_stmt(expr: ast::Expr) -> ast::ExprStmt {
+    ast_from_text(&format!("fn f() {{ {}; }}", expr.syntax()))
+}
 
 pub fn token(kind: SyntaxKind) -> SyntaxToken {
     tokens::SOURCE_FILE
@@ -203,7 +220,7 @@ pub mod tokens {
     use once_cell::sync::Lazy;
 
     pub(super) static SOURCE_FILE: Lazy<Parse<SourceFile>> =
-        Lazy::new(|| SourceFile::parse("const C: <()>::Item = (1 != 1, 2 == 2)\n;"));
+        Lazy::new(|| SourceFile::parse("const C: <()>::Item = (1 != 1, 2 == 2, !true)\n;"));
 
     pub fn comma() -> SyntaxToken {
         SOURCE_FILE