nushell/crates/nu-protocol/tests/test_signature.rs

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use nu_protocol::{Flag, PositionalArg, Signature, SyntaxShape};
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#[test]
fn test_signature() {
let signature = Signature::new("new_signature");
let from_build = Signature::build("new_signature");
// asserting partial eq implementation
assert_eq!(signature, from_build);
// constructing signature with description
let signature = Signature::new("signature").usage("example usage");
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assert_eq!(signature.usage, "example usage".to_string())
}
#[test]
fn test_signature_chained() {
let signature = Signature::new("new_signature")
.usage("description")
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.required("required", SyntaxShape::String, "required description")
.optional("optional", SyntaxShape::String, "optional description")
.required_named(
"req-named",
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SyntaxShape::String,
"required named description",
Some('r'),
)
.named("named", SyntaxShape::String, "named description", Some('n'))
.switch("switch", "switch description", None)
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.rest("rest", SyntaxShape::String, "rest description");
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assert_eq!(signature.required_positional.len(), 1);
assert_eq!(signature.optional_positional.len(), 1);
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assert_eq!(signature.named.len(), 4); // The 3 above + help
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assert!(signature.rest_positional.is_some());
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assert_eq!(signature.get_shorts(), vec!['h', 'r', 'n']);
assert_eq!(
signature.get_names(),
vec!["help", "req-named", "named", "switch"]
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);
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assert_eq!(signature.num_positionals(), 2);
assert_eq!(
signature.get_positional(0),
Some(PositionalArg {
name: "required".to_string(),
desc: "required description".to_string(),
shape: SyntaxShape::String,
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var_id: None,
default_value: None,
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})
);
assert_eq!(
signature.get_positional(1),
Some(PositionalArg {
name: "optional".to_string(),
desc: "optional description".to_string(),
shape: SyntaxShape::String,
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var_id: None,
default_value: None,
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})
);
assert_eq!(
signature.get_positional(2),
Some(PositionalArg {
name: "rest".to_string(),
desc: "rest description".to_string(),
shape: SyntaxShape::String,
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var_id: None,
default_value: None,
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})
);
assert_eq!(
signature.get_long_flag("req-named"),
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Some(Flag {
long: "req-named".to_string(),
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short: Some('r'),
arg: Some(SyntaxShape::String),
required: true,
desc: "required named description".to_string(),
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var_id: None,
default_value: None,
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})
);
assert_eq!(
signature.get_short_flag('r'),
Some(Flag {
long: "req-named".to_string(),
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short: Some('r'),
arg: Some(SyntaxShape::String),
required: true,
desc: "required named description".to_string(),
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var_id: None,
default_value: None,
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})
);
}
#[test]
#[should_panic(expected = "There may be duplicate short flags, such as -h")]
fn test_signature_same_short() {
// Creating signature with same short name should panic
Signature::new("new_signature")
.required_named(
"required-named",
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SyntaxShape::String,
"required named description",
Some('n'),
)
.named("named", SyntaxShape::String, "named description", Some('n'));
}
#[test]
#[should_panic(expected = "There may be duplicate name flags, such as --help")]
fn test_signature_same_name() {
// Creating signature with same short name should panic
Signature::new("new-signature")
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.required_named(
"name",
SyntaxShape::String,
"required named description",
Some('r'),
)
.named("name", SyntaxShape::String, "named description", Some('n'));
}
#[test]
fn test_signature_round_trip() {
let signature = Signature::new("new_signature")
.usage("description")
.required("first", SyntaxShape::String, "first required")
.required("second", SyntaxShape::Int, "second required")
.optional("optional", SyntaxShape::String, "optional description")
.required_named(
"req-named",
SyntaxShape::String,
"required named description",
Some('r'),
)
.named("named", SyntaxShape::String, "named description", Some('n'))
.switch("switch", "switch description", None)
.rest("rest", SyntaxShape::String, "rest description")
.category(nu_protocol::Category::Conversions);
let string = serde_json::to_string_pretty(&signature).unwrap();
let returned: Signature = serde_json::from_str(&string).unwrap();
assert_eq!(signature.name, returned.name);
assert_eq!(signature.usage, returned.usage);
assert_eq!(signature.extra_usage, returned.extra_usage);
assert_eq!(signature.is_filter, returned.is_filter);
assert_eq!(signature.category, returned.category);
signature
.required_positional
.iter()
.zip(returned.required_positional.iter())
.for_each(|(lhs, rhs)| assert_eq!(lhs, rhs));
signature
.optional_positional
.iter()
.zip(returned.optional_positional.iter())
.for_each(|(lhs, rhs)| assert_eq!(lhs, rhs));
signature
.named
.iter()
.zip(returned.named.iter())
.for_each(|(lhs, rhs)| assert_eq!(lhs, rhs));
assert_eq!(signature.rest_positional, returned.rest_positional,);
}