nushell/crates/nu-parser/tests/test_parser.rs
JT 2f8a52d256
Switch let/let-env family to init with math expressions (#8545)
# Description

This is an experiment to see what switching the `let/let-env` family to
math expressions for initialisers would be like.

# User-Facing Changes

This would require any commands you call from `let x = <command here>`
(and similar family) to call the command in parentheses. `let x = (foo)`
to call `foo`.

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
2023-03-23 09:14:10 +13:00

1995 lines
59 KiB
Rust

use nu_parser::ParseError;
use nu_parser::*;
use nu_protocol::ast::{Call, PathMember};
use nu_protocol::Span;
use nu_protocol::{
ast::{Expr, Expression, PipelineElement},
engine::{Command, EngineState, Stack, StateWorkingSet},
PipelineData, ShellError, Signature, SyntaxShape,
};
#[cfg(test)]
#[derive(Clone)]
pub struct Let;
#[cfg(test)]
impl Command for Let {
fn name(&self) -> &str {
"let"
}
fn usage(&self) -> &str {
"Create a variable and give it a value."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build("let")
.required("var_name", SyntaxShape::VarWithOptType, "variable name")
.required(
"initial_value",
SyntaxShape::Keyword(b"=".to_vec(), Box::new(SyntaxShape::MathExpression)),
"equals sign followed by value",
)
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
fn test_int(
test_tag: &str, // name of sub-test
test: &[u8], // input expression
expected_val: Expr, // (usually Expr::{Int,String, Float}, not ::BinOp...
expected_err: Option<&str>,
) // substring in error text
{
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, test, true, &[]);
if let Some(err_pat) = expected_err {
if let Some(parse_err) = err {
let act_err = format!("{:?}", parse_err);
assert!(
act_err.contains(err_pat),
"{test_tag}: expected err to contain {err_pat}, but actual error was {act_err}"
);
} else {
assert!(
err.is_some(),
"{test_tag}: expected err containing {err_pat}, but no error returned"
);
}
} else {
assert!(err.is_none(), "{test_tag}: unexpected error {err:#?}");
assert_eq!(block.len(), 1, "{test_tag}: result block length > 1");
let expressions = &block[0];
assert_eq!(
expressions.len(),
1,
"{test_tag}: got multiple result expressions, expected 1"
);
if let PipelineElement::Expression(
_,
Expression {
expr: observed_val, ..
},
) = &expressions[0]
{
compare_rhs_binaryOp(test_tag, &expected_val, observed_val);
}
}
}
#[allow(non_snake_case)]
fn compare_rhs_binaryOp(
test_tag: &str,
expected: &Expr, // the rhs expr we hope to see (::Int, ::Float, not ::B)
observed: &Expr, // the Expr actually provided: can be ::Int, ::Float, ::String,
// or ::BinOp (in which case rhs is checked), or ::Call (in which case cmd is checked)
) {
match observed {
Expr::Int(..) | Expr::Float(..) | Expr::String(..) => {
assert_eq!(
expected, observed,
"{test_tag}: Expected: {expected:#?}, observed {observed:#?}"
);
}
Expr::BinaryOp(_, _, e) => {
let observed_expr = &e.expr;
// can't pattern match Box<Foo>, but can match the box, then deref in separate statement.
assert_eq!(
expected, observed_expr,
"{test_tag}: Expected: {expected:#?}, observed: {observed:#?}"
)
}
Expr::ExternalCall(e, _, _) => {
let observed_expr = &e.expr;
assert_eq!(
expected, observed_expr,
"{test_tag}: Expected: {expected:#?}, observed: {observed_expr:#?}"
)
}
_ => {
panic!("{test_tag}: Unexpected Expr:: variant returned, observed {observed:#?}");
}
}
}
#[test]
pub fn multi_test_parse_int() {
struct Test<'a>(&'a str, &'a [u8], Expr, Option<&'a str>);
// use test expression of form '0 + x' to force parse() to parse x as numeric.
// if expression were just 'x', parse() would try other items that would mask the error we're looking for.
let tests = vec![
Test("binary literal int", b"0 + 0b0", Expr::Int(0), None),
Test(
"binary literal invalid digits",
b"0 + 0b2",
Expr::Int(0),
Some("invalid digits for radix 2"),
),
Test("octal literal int", b"0 + 0o1", Expr::Int(1), None),
Test(
"octal literal int invalid digits",
b"0 + 0o8",
Expr::Int(0),
Some("invalid digits for radix 8"),
),
Test(
"octal literal int truncated",
b"0 + 0o",
Expr::Int(0),
Some("invalid digits for radix 8"),
),
Test("hex literal int", b"0 + 0x2", Expr::Int(2), None),
Test(
"hex literal int invalid digits",
b"0 + 0x0aq",
Expr::Int(0),
Some("invalid digits for radix 16"),
),
Test(
"hex literal with 'e' not mistaken for float",
b"0 + 0x00e0",
Expr::Int(0xe0),
None,
),
// decimal (rad10) literal is anything that starts with
// optional sign then a digit.
Test("rad10 literal int", b"0 + 42", Expr::Int(42), None),
Test(
"rad10 with leading + sign",
b"0 + -42",
Expr::Int(-42),
None,
),
Test("rad10 with leading - sign", b"0 + +42", Expr::Int(42), None),
Test(
"flag char is string, not (invalid) int",
b"-x",
Expr::String("-x".into()),
None,
),
Test(
"keyword parameter is string",
b"--exact",
Expr::String("--exact".into()),
None,
),
Test(
"ranges or relative paths not confused for int",
b"./a/b",
Expr::String("./a/b".into()),
None,
),
Test(
"semver data not confused for int",
b"1.0.1",
Expr::String("1.0.1".into()),
None,
),
];
for test in tests {
test_int(test.0, test.1, test.2, test.3);
}
}
#[ignore]
#[test]
pub fn multi_test_parse_number() {
struct Test<'a>(&'a str, &'a [u8], Expr, Option<&'a str>);
// use test expression of form '0 + x' to force parse() to parse x as numeric.
// if expression were just 'x', parse() would try other items that would mask the error we're looking for.
let tests = vec![
Test("float decimal", b"0 + 43.5", Expr::Float(43.5), None),
//Test("float with leading + sign", b"0 + +41.7", Expr::Float(-41.7), None),
Test(
"float with leading - sign",
b"0 + -41.7",
Expr::Float(-41.7),
None,
),
Test(
"float scientific notation",
b"0 + 3e10",
Expr::Float(3.00e10),
None,
),
Test(
"float decimal literal invalid digits",
b"0 + .3foo",
Expr::Int(0),
Some("invalid digits"),
),
Test(
"float scientific notation literal invalid digits",
b"0 + 3e0faa",
Expr::Int(0),
Some("invalid digits"),
),
Test(
// odd that error is unsupportedOperation, but it does fail.
"decimal literal int 2 leading signs",
b"0 + --9",
Expr::Int(0),
Some("UnsupportedOperation"),
),
//Test(
// ".<string> should not be taken as float",
// b"abc + .foo",
// Expr::String("..".into()),
// None,
//),
];
for test in tests {
test_int(test.0, test.1, test.2, test.3);
}
}
#[ignore]
#[test]
fn test_parse_any() {
let test = b"1..10";
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, test, true, &[]);
match (block, err) {
(_, Some(e)) => {
println!("test: {test:?}, error: {e:#?}");
}
(b, None) => {
println!("test: {test:?}, parse: {b:#?}");
}
}
}
#[test]
pub fn parse_int() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"3", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Int(3),
..
}
)
))
}
#[test]
pub fn parse_int_with_underscores() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"420_69_2023", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Int(420692023),
..
}
)
))
}
#[test]
pub fn parse_cell_path() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_variable(
"foo".to_string().into_bytes(),
Span::test_data(),
nu_protocol::Type::Record(vec![]),
false,
);
let (block, err) = parse(&mut working_set, None, b"$foo.bar.baz", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
// hoo boy this pattern matching is a pain
if let PipelineElement::Expression(_, expr) = &expressions[0] {
if let Expr::FullCellPath(b) = &expr.expr {
assert!(matches!(
b.head,
Expression {
expr: Expr::Var(_),
..
}
));
if let [a, b] = &b.tail[..] {
if let PathMember::String { val, optional, .. } = a {
assert_eq!(val, "bar");
assert_eq!(optional, &false);
} else {
panic!("wrong type")
}
if let PathMember::String { val, optional, .. } = b {
assert_eq!(val, "baz");
assert_eq!(optional, &false);
} else {
panic!("wrong type")
}
} else {
panic!("cell path tail is unexpected")
}
} else {
panic!("Not a cell path");
}
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_cell_path_optional() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_variable(
"foo".to_string().into_bytes(),
Span::test_data(),
nu_protocol::Type::Record(vec![]),
false,
);
let (block, err) = parse(&mut working_set, None, b"$foo.bar?.baz", true, &[]);
if let Some(err) = err {
dbg!(err);
panic!();
}
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
// hoo boy this pattern matching is a pain
if let PipelineElement::Expression(_, expr) = &expressions[0] {
if let Expr::FullCellPath(b) = &expr.expr {
assert!(matches!(
b.head,
Expression {
expr: Expr::Var(_),
..
}
));
if let [a, b] = &b.tail[..] {
if let PathMember::String { val, optional, .. } = a {
assert_eq!(val, "bar");
assert_eq!(optional, &true);
} else {
panic!("wrong type")
}
if let PathMember::String { val, optional, .. } = b {
assert_eq!(val, "baz");
assert_eq!(optional, &false);
} else {
panic!("wrong type")
}
} else {
panic!("cell path tail is unexpected")
}
} else {
panic!("Not a cell path");
}
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_hex_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0x[13]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0x13]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_incomplete_hex_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0x[3]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0x03]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_binary_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0b[1010 1000]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0b10101000]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_incomplete_binary_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0b[10]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0b00000010]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_octal_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0o[250]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0o250]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_incomplete_octal_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0o[2]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::Binary(vec![0o2]))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_invalid_octal_format() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0b[90]", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert!(!matches!(&expr.expr, Expr::Binary(_)))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_binary_with_multi_byte_char() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
// found using fuzzing, Rust can panic if you slice into this string
let contents = b"0x[\xEF\xBF\xBD]";
let (block, err) = parse(&mut working_set, None, contents, true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert!(!matches!(&expr.expr, Expr::Binary(_)))
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_call() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'));
working_set.add_decl(sig.predeclare());
let (block, err) = parse(&mut working_set, None, b"foo", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) = &expressions[0]
{
assert_eq!(call.decl_id, 0);
}
}
#[test]
pub fn parse_call_missing_flag_arg() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").named("jazz", SyntaxShape::Int, "jazz!!", Some('j'));
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo --jazz", true, &[]);
assert!(matches!(err, Some(ParseError::MissingFlagParam(..))));
}
#[test]
pub fn parse_call_missing_short_flag_arg() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'));
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo -j", true, &[]);
assert!(matches!(err, Some(ParseError::MissingFlagParam(..))));
}
#[test]
pub fn parse_call_too_many_shortflag_args() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo")
.named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'))
.named("--math", SyntaxShape::Int, "math!!", Some('m'));
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo -mj", true, &[]);
assert!(matches!(
err,
Some(ParseError::ShortFlagBatchCantTakeArg(..))
));
}
#[test]
pub fn parse_call_unknown_shorthand() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").switch("--jazz", "jazz!!", Some('j'));
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo -mj", true, &[]);
assert!(matches!(err, Some(ParseError::UnknownFlag(..))));
}
#[test]
pub fn parse_call_extra_positional() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").switch("--jazz", "jazz!!", Some('j'));
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo -j 100", true, &[]);
assert!(matches!(err, Some(ParseError::ExtraPositional(..))));
}
#[test]
pub fn parse_call_missing_req_positional() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").required("jazz", SyntaxShape::Int, "jazz!!");
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo", true, &[]);
assert!(matches!(err, Some(ParseError::MissingPositional(..))));
}
#[test]
pub fn parse_call_missing_req_flag() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let sig = Signature::build("foo").required_named("--jazz", SyntaxShape::Int, "jazz!!", None);
working_set.add_decl(sig.predeclare());
let (_, err) = parse(&mut working_set, None, b"foo", true, &[]);
assert!(matches!(err, Some(ParseError::MissingRequiredFlag(..))));
}
#[test]
fn test_nothing_comparison_eq() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"2 == null", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
&expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::BinaryOp(..),
..
}
)
))
}
#[test]
fn test_nothing_comparison_neq() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"2 != null", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
&expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::BinaryOp(..),
..
}
)
))
}
mod string {
use super::*;
#[test]
pub fn parse_string() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"\"hello nushell\"", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
assert_eq!(expr.expr, Expr::String("hello nushell".to_string()))
} else {
panic!("Not an expression")
}
}
mod interpolation {
use nu_protocol::Span;
use super::*;
#[test]
pub fn parse_string_interpolation() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"$\"hello (39 + 3)\"", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
let subexprs: Vec<&Expr> = match expr {
Expression {
expr: Expr::StringInterpolation(expressions),
..
} => expressions.iter().map(|e| &e.expr).collect(),
_ => panic!("Expected an `Expr::StringInterpolation`"),
};
assert_eq!(subexprs.len(), 2);
assert_eq!(subexprs[0], &Expr::String("hello ".to_string()));
assert!(matches!(subexprs[1], &Expr::FullCellPath(..)));
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_string_interpolation_escaped_parenthesis() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"$\"hello \\(39 + 3)\"", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
let subexprs: Vec<&Expr> = match expr {
Expression {
expr: Expr::StringInterpolation(expressions),
..
} => expressions.iter().map(|e| &e.expr).collect(),
_ => panic!("Expected an `Expr::StringInterpolation`"),
};
assert_eq!(subexprs.len(), 1);
assert_eq!(subexprs[0], &Expr::String("hello (39 + 3)".to_string()));
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_string_interpolation_escaped_backslash_before_parenthesis() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(
&mut working_set,
None,
b"$\"hello \\\\(39 + 3)\"",
true,
&[],
);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
let subexprs: Vec<&Expr> = match expr {
Expression {
expr: Expr::StringInterpolation(expressions),
..
} => expressions.iter().map(|e| &e.expr).collect(),
_ => panic!("Expected an `Expr::StringInterpolation`"),
};
assert_eq!(subexprs.len(), 2);
assert_eq!(subexprs[0], &Expr::String("hello \\".to_string()));
assert!(matches!(subexprs[1], &Expr::FullCellPath(..)));
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_string_interpolation_backslash_count_reset_by_expression() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(
&mut working_set,
None,
b"$\"\\(1 + 3)\\(7 - 5)\"",
true,
&[],
);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
if let PipelineElement::Expression(_, expr) = &expressions[0] {
let subexprs: Vec<&Expr> = match expr {
Expression {
expr: Expr::StringInterpolation(expressions),
..
} => expressions.iter().map(|e| &e.expr).collect(),
_ => panic!("Expected an `Expr::StringInterpolation`"),
};
assert_eq!(subexprs.len(), 1);
assert_eq!(subexprs[0], &Expr::String("(1 + 3)(7 - 5)".to_string()));
} else {
panic!("Not an expression")
}
}
#[test]
pub fn parse_nested_expressions() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_variable(
"foo".to_string().into_bytes(),
Span::new(0, 0),
nu_protocol::Type::CellPath,
false,
);
let (_block, err) = parse(
&mut working_set,
None,
br#"
$"(($foo))"
"#,
true,
&[],
);
assert!(err.is_none());
}
#[test]
pub fn parse_path_expression() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_variable(
"foo".to_string().into_bytes(),
Span::new(0, 0),
nu_protocol::Type::CellPath,
false,
);
let (_block, err) = parse(
&mut working_set,
None,
br#"
$"Hello ($foo.bar)"
"#,
true,
&[],
);
assert!(err.is_none());
}
}
}
mod range {
use super::*;
use nu_protocol::ast::{RangeInclusion, RangeOperator};
#[test]
fn parse_inclusive_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0..10", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_exclusive_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0..<10", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_reverse_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"10..0", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_subexpression_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"(3 - 3)..<(8 + 2)", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_variable_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_decl(Box::new(Let));
let (block, err) = parse(&mut working_set, None, b"let a = 2; $a..10", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 2);
let expressions = &block[1];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_subexpression_variable_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
working_set.add_decl(Box::new(Let));
let (block, err) = parse(
&mut working_set,
None,
b"let a = 2; $a..<($a + 10)",
true,
&[],
);
assert!(err.is_none());
assert_eq!(block.len(), 2);
let expressions = &block[1];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_right_unbounded_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"0..", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
None,
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_left_unbounded_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"..10", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
None,
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_negative_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"-10..-3", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn parse_float_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (block, err) = parse(&mut working_set, None, b"2.0..4.0..10.0", true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 1);
assert!(matches!(
expressions[0],
PipelineElement::Expression(
_,
Expression {
expr: Expr::Range(
Some(_),
Some(_),
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
)
))
}
#[test]
fn bad_parse_does_crash() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
let (_, err) = parse(&mut working_set, None, b"(0)..\"a\"", true, &[]);
assert!(err.is_some());
}
}
#[cfg(test)]
mod input_types {
use super::*;
use nu_protocol::ast::Call;
use nu_protocol::{ast::Argument, Category, PipelineData, ShellError, Type};
#[derive(Clone)]
pub struct LsTest;
impl Command for LsTest {
fn name(&self) -> &str {
"ls"
}
fn usage(&self) -> &str {
"Mock ls command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name()).category(Category::Default)
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct GroupBy;
impl Command for GroupBy {
fn name(&self) -> &str {
"group-by"
}
fn usage(&self) -> &str {
"Mock group-by command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.required("column", SyntaxShape::String, "column name")
.category(Category::Default)
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct ToCustom;
impl Command for ToCustom {
fn name(&self) -> &str {
"to-custom"
}
fn usage(&self) -> &str {
"Mock converter command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.input_type(Type::Any)
.output_type(Type::Custom("custom".into()))
.category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct GroupByCustom;
impl Command for GroupByCustom {
fn name(&self) -> &str {
"group-by"
}
fn usage(&self) -> &str {
"Mock custom group-by command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.required("column", SyntaxShape::String, "column name")
.required("other", SyntaxShape::String, "other value")
.input_type(Type::Custom("custom".into()))
.output_type(Type::Custom("custom".into()))
.category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct AggCustom;
impl Command for AggCustom {
fn name(&self) -> &str {
"agg"
}
fn usage(&self) -> &str {
"Mock custom agg command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.required("operation", SyntaxShape::String, "operation")
.input_type(Type::Custom("custom".into()))
.category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct AggMin;
impl Command for AggMin {
fn name(&self) -> &str {
"min"
}
fn usage(&self) -> &str {
"Mock custom min command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name()).category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct WithColumn;
impl Command for WithColumn {
fn name(&self) -> &str {
"with-column"
}
fn usage(&self) -> &str {
"Mock custom with-column command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.rest("operation", SyntaxShape::Any, "operation")
.input_type(Type::Custom("custom".into()))
.output_type(Type::Custom("custom".into()))
.category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct Collect;
impl Command for Collect {
fn name(&self) -> &str {
"collect"
}
fn usage(&self) -> &str {
"Mock custom collect command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build(self.name())
.input_type(Type::Custom("custom".into()))
.output_type(Type::Custom("custom".into()))
.category(Category::Custom("custom".into()))
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
#[derive(Clone)]
pub struct IfMocked;
impl Command for IfMocked {
fn name(&self) -> &str {
"if"
}
fn usage(&self) -> &str {
"Mock if command."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build("if")
.required("cond", SyntaxShape::MathExpression, "condition to check")
.required(
"then_block",
SyntaxShape::Block,
"block to run if check succeeds",
)
.optional(
"else_expression",
SyntaxShape::Keyword(
b"else".to_vec(),
Box::new(SyntaxShape::OneOf(vec![
SyntaxShape::Block,
SyntaxShape::Expression,
])),
),
"expression or block to run if check fails",
)
.category(Category::Core)
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
_call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
todo!()
}
}
fn add_declarations(engine_state: &mut EngineState) {
let delta = {
let mut working_set = StateWorkingSet::new(engine_state);
working_set.add_decl(Box::new(Let));
working_set.add_decl(Box::new(AggCustom));
working_set.add_decl(Box::new(GroupByCustom));
working_set.add_decl(Box::new(GroupBy));
working_set.add_decl(Box::new(LsTest));
working_set.add_decl(Box::new(ToCustom));
working_set.add_decl(Box::new(AggMin));
working_set.add_decl(Box::new(Collect));
working_set.add_decl(Box::new(WithColumn));
working_set.add_decl(Box::new(IfMocked));
working_set.render()
};
engine_state
.merge_delta(delta)
.expect("Error merging delta");
}
#[test]
fn call_types_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"ls | to-custom | group-by name other"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 3);
match &expressions[0] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"ls", &Type::Any)
.expect("Error merging delta");
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set.find_decl(b"to-custom", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
match &expressions[2] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"group-by", &Type::Custom("custom".into()))
.unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn storing_variable_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input =
r#"let a = (ls | to-custom | group-by name other); let b = (1+3); $a | agg sum"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 3);
let expressions = &block[2];
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"agg", &Type::Custom("custom".into()))
.unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn stored_variable_operation_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"let a = (ls | to-custom | group-by name other); ($a + $a) | agg sum"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 2);
let expressions = &block[1];
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"agg", &Type::Custom("custom".into()))
.unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn multiple_stored_variable_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"
let a = (ls | to-custom | group-by name other); [1 2 3] | to-custom; [1 2 3] | to-custom"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 3);
let expressions = &block[1];
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set.find_decl(b"to-custom", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
let expressions = &block[2];
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set.find_decl(b"to-custom", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn call_non_custom_types_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"ls | group-by name"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
assert_eq!(expressions.len(), 2);
match &expressions[0] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set.find_decl(b"ls", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set.find_decl(b"group-by", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn nested_operations_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let (block, delta) = {
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"ls | to-custom | group-by name other | agg ("b" | min)"#;
let (block, _) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
(block, working_set.render())
};
engine_state.merge_delta(delta).unwrap();
let expressions = &block[0];
match &expressions[3] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let arg = &call.arguments[0];
match arg {
Argument::Positional(a) => match &a.expr {
Expr::FullCellPath(path) => match &path.head.expr {
Expr::Subexpression(id) => {
let block = engine_state.get_block(*id);
let expressions = &block[0];
assert_eq!(expressions.len(), 2);
match &expressions[1] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let working_set = StateWorkingSet::new(&engine_state);
let expected_id =
working_set.find_decl(b"min", &Type::Any).unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
_ => panic!("Expected Subexpression not found"),
},
_ => panic!("Expected FullCellPath not found"),
},
_ => panic!("Expected Argument Positional not found"),
}
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn call_with_list_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let input = r#"[[a b]; [1 2] [3 4]] | to-custom | with-column [ ("a" | min) ("b" | min) ] | collect"#;
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none());
assert_eq!(block.len(), 1);
let expressions = &block[0];
match &expressions[2] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"with-column", &Type::Custom("custom".into()))
.unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
match &expressions[3] {
PipelineElement::Expression(
_,
Expression {
expr: Expr::Call(call),
..
},
) => {
let expected_id = working_set
.find_decl(b"collect", &Type::Custom("custom".into()))
.unwrap();
assert_eq!(call.decl_id, expected_id)
}
_ => panic!("Expected expression Call not found"),
}
}
#[test]
fn operations_within_blocks_test() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let inputs = vec![
r#"let a = 'b'; ($a == 'b') or ($a == 'b')"#,
r#"let a = 'b'; ($a == 'b') or ($a == 'b') and ($a == 'b')"#,
r#"let a = 1; ($a == 1) or ($a == 2) and ($a == 3)"#,
r#"let a = 'b'; if ($a == 'b') or ($a == 'b') { true } else { false }"#,
r#"let a = 1; if ($a == 1) or ($a > 0) { true } else { false }"#,
];
for input in inputs {
let (block, err) = parse(&mut working_set, None, input.as_bytes(), true, &[]);
assert!(err.is_none(), "testing: {input}");
assert_eq!(block.len(), 2, "testing: {input}");
}
}
#[test]
fn else_errors_correctly() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let (_, err) = parse(
&mut working_set,
None,
b"if false { 'a' } else { $foo }",
true,
&[],
);
let err = err.unwrap();
assert!(matches!(err, ParseError::VariableNotFound(_)));
}
#[test]
fn else_if_errors_correctly() {
let mut engine_state = EngineState::new();
add_declarations(&mut engine_state);
let mut working_set = StateWorkingSet::new(&engine_state);
let (_, err) = parse(
&mut working_set,
None,
b"if false { 'a' } else $foo { 'b' }",
true,
&[],
);
let err = err.unwrap();
assert!(matches!(err, ParseError::VariableNotFound(_)));
}
}