Use trybuild for testing expected proc macro errors (#205)

Cargo.toml

@@ -30,4 +30,7 @@ travis-ci = { repository = "TeXitoi/structopt" }
 clap = { version = "2.33", default-features = false }
 structopt-derive = { path = "structopt-derive", version = "0.3.0" }
 
+[dev-dependencies]
+trybuild = "1.0.5"
+
 [workspace]

tests/macro-errors.rs

@@ -0,0 +1,12 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+
+#[test]
+fn ui() {
+    let t = trybuild::TestCases::new();
+    t.compile_fail("tests/ui/*.rs");
+}

tests/ui/bool_default_value.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, default_value = true)]
+    b: bool,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/bool_default_value.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/bool_default_value.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: default_value is meaningless for bool

tests/ui/bool_required.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, required = true)]
+    b: bool,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/bool_required.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/bool_required.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: required is meaningless for bool

tests/ui/flatten_and_doc.rs

@@ -0,0 +1,32 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt)]
+struct DaemonOpts {
+    #[structopt(short)]
+    user: String,
+    #[structopt(short)]
+    group: String,
+}
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    /// Opts.
+    #[structopt(flatten)]
+    opts: DaemonOpts,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/flatten_and_doc.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/flatten_and_doc.rs:21:10
+   |
+21 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: methods and doc comments are not allowed for flattened entry

tests/ui/flatten_and_methods.rs

@@ -0,0 +1,31 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt)]
+struct DaemonOpts {
+    #[structopt(short)]
+    user: String,
+    #[structopt(short)]
+    group: String,
+}
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, flatten)]
+    opts: DaemonOpts,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/flatten_and_methods.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/flatten_and_methods.rs:21:10
+   |
+21 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: methods and doc comments are not allowed for flattened entry

tests/ui/flatten_and_parse.rs

@@ -0,0 +1,31 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt)]
+struct DaemonOpts {
+    #[structopt(short)]
+    user: String,
+    #[structopt(short)]
+    group: String,
+}
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(flatten, parse(from_occurrences))]
+    opts: DaemonOpts,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/flatten_and_parse.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/flatten_and_parse.rs:21:10
+   |
+21 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: parse attribute is not allowed for flattened entry

tests/ui/literal_list_element.rs

@@ -0,0 +1,24 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(test(1, 2))]
+    debug: bool,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}
+

tests/ui/literal_list_element.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/literal_list_element.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: unsupported option: test ( 1 , 2 )

tests/ui/non_existent_attr.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, non_existing_attribute = 1)]
+    debug: bool,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/non_existent_attr.stderr

@@ -0,0 +1,7 @@
+error[E0599]: no method named `non_existing_attribute` found for type `structopt::clap::Arg<'_, '_>` in the current scope
+  --> $DIR/non_existent_attr.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+
+For more information about this error, try `rustc --explain E0599`.

tests/ui/non_literal_attr_value.rs

@@ -0,0 +1,24 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, aliases = &["debug", "dbg"])]
+    debug: bool,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}
+

tests/ui/non_literal_attr_value.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/non_literal_attr_value.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: invalid structopt syntax: expected literal: # [ structopt ( short , aliases = & [ "debug" , "dbg" ] ) ]

tests/ui/opt_opt_nonpositional.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    n: Option<Option<u32>>,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/opt_opt_nonpositional.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/opt_opt_nonpositional.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: Option<Option<T>> type is meaningless for positional argument

tests/ui/opt_vec_nonpositional.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    n: Option<Vec<u32>>,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/opt_vec_nonpositional.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/opt_vec_nonpositional.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: Option<Vec<T>> type is meaningless for positional argument

tests/ui/option_default_value.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate structopt;
+
+use structopt::StructOpt;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "basic")]
+struct Opt {
+    #[structopt(short, default_value = 1)]
+    n: Option<u32>,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+}

tests/ui/option_default_value.stderr

@@ -0,0 +1,7 @@
+error: proc-macro derive panicked
+  --> $DIR/option_default_value.rs:13:10
+   |
+13 | #[derive(StructOpt, Debug)]
+   |          ^^^^^^^^^
+   |
+   = help: message: default_value is meaningless for Option