add test cases and rework spaces

Signed-off-by: Michael Pollind <mpollind@gmail.com>

askama_derive/src/generator/node.rs

@@ -608,7 +608,7 @@ impl<'a> Generator<'a, '_> {
         call: &'a WithSpan<'a, Call<'_>>,
     ) -> Result<usize, CompileError> {
         let Call {
-            ws,
+            ws1,
             scope,
             name,
             ref args,
@@ -650,7 +650,7 @@ impl<'a> Generator<'a, '_> {
             self.seen_macros.push((def, ctx.file_info_of(call.span())));
         }
         self.seen_callers.push(call);
-        self.flush_ws(ws); // Cannot handle_ws() here: whitespace from macro definition comes first
+        self.flush_ws(ws1); // Cannot handle_ws() here: whitespace from macro definition comes first
         let size_hint = self.push_locals(|this| {
             macro_call_ensure_arg_count(call, def, ctx)?;
 
@@ -771,7 +771,7 @@ impl<'a> Generator<'a, '_> {
             buf.write('}');
             Ok(size_hint)
         })?;
-        self.prepare_ws(ws);
+        self.prepare_ws(ws1);
         self.seen_macros.pop();
         self.seen_callers.pop();
         Ok(size_hint)
@@ -1119,9 +1119,10 @@ impl<'a> Generator<'a, '_> {
             if ***path == Expr::Var("super") {
                 return self.write_block(ctx, buf, None, ws, s.span());
             } else if ***path == Expr::Var("caller") {
-                let def = self.seen_callers.last().ok_or_else(|| {
+                let def = self.seen_callers.pop().ok_or_else(|| {
                     ctx.generate_error(format_args!("block is not defined for caller"), s.span())
                 })?;
+                self.handle_ws(ws); 
                 let size_hint = self.push_locals(|this| {
                     this.write_buf_writable(ctx, buf)?;
                     buf.write('{');
@@ -1180,14 +1181,14 @@ impl<'a> Generator<'a, '_> {
                             }
                         }
                     }
-
                     let mut size_hint = this.handle(ctx, &def.nodes, buf, AstLevel::Nested)?;
+                    
                     this.flush_ws(def.ws2);
                     size_hint += this.write_buf_writable(ctx, buf)?;
                     buf.write('}');
                     Ok(size_hint)
                 })?;
-                self.prepare_ws(ws);
+                self.seen_callers.push(def);
                 return Ok(size_hint);
             }
         }

askama_parser/src/node.rs

@@ -877,12 +877,11 @@ impl<'a> Import<'a> {
 
 #[derive(Debug, PartialEq)]
 pub struct Call<'a> {
-    pub ws: Ws,
+    pub ws1: Ws,
     pub caller_args: Vec<&'a str>,
     pub scope: Option<&'a str>,
     pub name: &'a str,
     pub args: Vec<WithSpan<'a, Expr<'a>>>,
-    pub ws1: Ws,
     pub nodes: Vec<Node<'a>>,
     pub ws2: Ws,
 }
@@ -947,12 +946,11 @@ impl<'a> Call<'a> {
 
         Ok(WithSpan::new(
             Self {
-                ws: Ws(pws, nws),
+                ws1: Ws(pws, nws),
                 caller_args: call_args.unwrap_or_default(),
                 scope,
                 name,
                 args,
-                ws1: Ws(pws, pws2),
                 nodes,
                 ws2: Ws(pws2, nws2),
             },

testing/tests/calls.rs

@@ -125,17 +125,18 @@ nested
     assert_eq!(x.render().unwrap(), "nested");
 }
 
+
 #[test]
 fn test_caller_struct() {
     struct TestInput<'a> {
-        a: &'a str, 
-        b: &'a str 
+        a: &'a str,
+        b: &'a str,
     }
     #[derive(Template)]
     #[template(
         source = r#"
 {%- macro test(a) -%}
-{{caller(a)}}
+{{- caller(a) -}}
 {%- endmacro -%}
 {%- call(value) test(a) -%}
 a: {{value.a}}
@@ -145,13 +146,10 @@ b: {{value.b}}
         ext = "txt"
     )]
     struct Tmpl<'a> {
-        a: TestInput<'a>
+        a: TestInput<'a>,
     }
     let x = Tmpl {
-        a: TestInput {
-            a: "one",
-            b: "two"
-        }
+        a: TestInput { a: "one", b: "two" },
     };
     assert_eq!(x.render().unwrap(), "a: one\nb: two");
 }
@@ -162,18 +160,18 @@ fn test_caller_args() {
     #[template(
         source = r#"
 {%- macro test() -%}
-{{-  caller("test") -}}
-{{-  caller(1) -}}
+{{~ caller("test") ~}}
+{{~ caller(1) ~}}
 {%- endmacro -%}
 {%- call(value) test() -%}
-nested {{value}}
+nested {{value}}  
 {%- endcall -%}
 "#,
         ext = "html"
     )]
     struct CallerEmpty {}
     let x = CallerEmpty {};
-    assert_eq!(x.render().unwrap(), "nested testnested 1");
+    assert_eq!(x.render().unwrap(), "nested test\nnested 1");
 }
 
 // Ensures that fields are not moved when calling a jinja macro.

testing/tests/macro.rs

@@ -238,6 +238,48 @@ fn test_default_value3() {
     );
 }
 
+// This test a caller expression with expressions in the arguments.
+#[test]
+fn test_caller_expr() {
+    #[derive(Template)]
+    #[template(
+        source = "{%- macro thrice(a, b, c) -%}
+{{caller(a+10,b - 10,a+b+c)}}
+{% endmacro -%}
+{%- call(a,b,c) thrice(10,11,13) -%}{{a}} {{b}} {{c + 1}}{%- endcall -%}
+",
+        ext = "html"
+    )]
+    struct MacroCallerExpr;
+    assert_eq!(MacroCallerExpr.render().unwrap(), "20 1 35\n");
+
+}
+
+#[test]
+fn test_caller_in_caller() {
+    #[derive(Template)]
+    #[template(
+        source = r#"
+        {%- macro test2() -%}
+            {{~ caller("bb") ~}}
+        {%- endmacro -%}
+        {%- macro test() -%}
+            {{~ caller("a") ~}}
+        {%- endmacro -%}
+        {%- call(a) test() -%}
+            {%- call(b) test2() -%}
+                one: {{ b }}
+            {%- endcall -%}
+            two: {{- a -}}
+        {%- endcall -%}
+        "#,
+        ext = "txt"
+    )]
+    struct CallerInCaller; 
+    assert_eq!(CallerInCaller.render().unwrap(), "one: bbtwo:a");
+}
+
+
 // This test ensures that we can use declared variables as default value for
 // macro arguments.
 #[test]

testing/tests/ui/caller_arguments.rs

@@ -0,0 +1,70 @@
+use askama::Template;
+
+#[derive(Template)]
+#[template(
+    source = r#"
+    {% macro test() %}
+        {{- caller("a", "b") -}}
+    {%- endmacro -%}
+    {%- call(a,b,c) test() -%}
+        {{- a -}}
+    {%- endcall -%}
+    "#,
+    ext = "txt"
+)]
+struct InvalidNumberArguments {
+}
+
+#[derive(Template)]
+#[template(
+    source = r#"
+    {% macro test() %}
+        {{- caller("a") -}}
+    {%- endmacro -%}
+    {%- call(a test() -%}
+        {{- a -}}
+    {%- endcall -%}
+    "#,
+    ext = "txt"
+)]
+struct NoClosingParen {
+}
+
+#[derive(Template)]
+#[template(
+    source = r#"
+    {% macro test() %}
+        {{- caller("a") -}}
+    {%- endmacro -%}
+    {%- call(a) test() -%}
+        {{- caller(a) -}}
+    {%- endcall -%}
+    "#,
+    ext = "txt"
+)]
+struct CallerInCaller {
+}
+
+#[derive(Template)]
+#[template(
+    source = r#"
+    {% macro test2() %}
+        {{ caller("bb") }}
+    {% endmacro %}
+    {% macro test() %}
+        {{ caller("a") }}
+    {%- endmacro -%}
+    {%- call(a) test() -%}
+        {% call(b) test2() %}
+            {{ caller("b") }}
+        {% endcall %}
+        {{- a -}}
+    {%- endcall -%}
+    "#,
+    ext = "txt"
+)]
+struct CallerInCaller1 {
+}
+
+fn main() {}
+

testing/tests/ui/caller_arguments.stderr

@@ -0,0 +1,59 @@
+error: missing `c` argument
+ --> InvalidNumberArguments.txt:3:18
+       "(\"a\", \"b\") -}}\n    {%- endmacro -%}\n    {%- call(a,b,c) test() -%}\n        {{- a"...
+  --> tests/ui/caller_arguments.rs:5:14
+   |
+5  |       source = r#"
+   |  ______________^
+6  | |     {% macro test() %}
+7  | |         {{- caller("a", "b") -}}
+8  | |     {%- endmacro -%}
+...  |
+11 | |     {%- endcall -%}
+12 | |     "#,
+   | |______^
+
+error: expected `)` to close call argument list
+ --> <source attribute>:5:15
+       "test() -%}\n        {{- a -}}\n    {%- endcall -%}\n    "
+  --> tests/ui/caller_arguments.rs:20:14
+   |
+20 |       source = r#"
+   |  ______________^
+21 | |     {% macro test() %}
+22 | |         {{- caller("a") -}}
+23 | |     {%- endmacro -%}
+...  |
+26 | |     {%- endcall -%}
+27 | |     "#,
+   | |______^
+
+error: block is not defined for caller
+ --> CallerInCaller.txt:6:18
+       "(a) -}}\n    {%- endcall -%}\n    "
+  --> tests/ui/caller_arguments.rs:35:14
+   |
+35 |       source = r#"
+   |  ______________^
+36 | |     {% macro test() %}
+37 | |         {{- caller("a") -}}
+38 | |     {%- endmacro -%}
+...  |
+41 | |     {%- endcall -%}
+42 | |     "#,
+   | |______^
+
+error: block is not defined for caller
+ --> CallerInCaller1.txt:10:21
+       "(\"b\") }}\n        {% endcall %}\n        {{- a -}}\n    {%- endcall -%}\n    "
+  --> tests/ui/caller_arguments.rs:50:14
+   |
+50 |       source = r#"
+   |  ______________^
+51 | |     {% macro test2() %}
+52 | |         {{ caller("bb") }}
+53 | |     {% endmacro %}
+...  |
+62 | |     {%- endcall -%}
+63 | |     "#,
+   | |______^