Add tests for named arguments in macro calls

2 files changed, 89 insertions, 0 deletions

diff --git a/testing/tests/ui/macro_named_argument.rs b/testing/tests/ui/macro_named_argument.rs
new file mode 100644
index 0000000..fe8a194
--- /dev/null
+++ b/testing/tests/ui/macro_named_argument.rs
@@ -0,0 +1,45 @@
+use askama::Template;
+
+#[derive(Template)]
+#[template(source = "{%- macro thrice(param1, param2) -%}
+{{ param1 }} {{ param2 }}
+{%- endmacro -%}
+
+{%- call thrice(param1=2, param3=3) -%}", ext = "html")]
+struct InvalidNamedArg;
+
+#[derive(Template)]
+#[template(source = "{%- macro thrice(param1, param2) -%}
+{{ param1 }} {{ param2 }}
+{%- endmacro -%}
+
+{%- call thrice(param1=2, param1=3) -%}", ext = "html")]
+struct InvalidNamedArg2;
+
+// Ensures that filters can't have named arguments.
+#[derive(Template)]
+#[template(source = "{%- macro thrice(param1, param2) -%}
+{{ param1 }} {{ param2 }}
+{%- endmacro -%}
+
+{%- call thrice(3, param1=2) | filter(param1=12) -%}", ext = "html")]
+struct InvalidNamedArg3;
+
+// Ensures that named arguments can only be passed last.
+#[derive(Template)]
+#[template(source = "{%- macro thrice(param1, param2) -%}
+{{ param1 }} {{ param2 }}
+{%- endmacro -%}
+{%- call thrice(param1=2, 3) -%}", ext = "html")]
+struct InvalidNamedArg4;
+
+// Ensures that named arguments can't be used for arguments before them.
+#[derive(Template)]
+#[template(source = "{%- macro thrice(param1, param2) -%}
+{{ param1 }} {{ param2 }}
+{%- endmacro -%}
+{%- call thrice(3, param1=2) -%}", ext = "html")]
+struct InvalidNamedArg5;
+
+fn main() {
+}
diff --git a/testing/tests/ui/macro_named_argument.stderr b/testing/tests/ui/macro_named_argument.stderr
new file mode 100644
index 0000000..b346f2d
--- /dev/null
+++ b/testing/tests/ui/macro_named_argument.stderr
@@ -0,0 +1,44 @@
+error: no argument named `param3` in macro "thrice"
+ --> tests/ui/macro_named_argument.rs:3:10
+  |
+3 | #[derive(Template)]
+  |          ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: named argument `param1` was passed more than once
+       problems parsing template source at row 5, column 15 near:
+       "(param1=2, param1=3) -%}"
+  --> tests/ui/macro_named_argument.rs:11:10
+   |
+11 | #[derive(Template)]
+   |          ^^^^^^^^
+   |
+   = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: problems parsing template source at row 5, column 29 near:
+       "| filter(param1=12) -%}"
+  --> tests/ui/macro_named_argument.rs:20:10
+   |
+20 | #[derive(Template)]
+   |          ^^^^^^^^
+   |
+   = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: named arguments must always be passed last
+       problems parsing template source at row 4, column 15 near:
+       "(param1=2, 3) -%}"
+  --> tests/ui/macro_named_argument.rs:29:10
+   |
+29 | #[derive(Template)]
+   |          ^^^^^^^^
+   |
+   = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: cannot have unnamed argument (`param2`) after named argument in macro "thrice"
+  --> tests/ui/macro_named_argument.rs:37:10
+   |
+37 | #[derive(Template)]
+   |          ^^^^^^^^
+   |
+   = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)