nushell/crates/nu-parser/tests/test_parser.rs

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use nu_parser::ParseError;
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use nu_parser::*;
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use nu_protocol::{
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ast::{Expr, Expression, Pipeline, Statement},
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engine::{Command, EngineState, StateWorkingSet},
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Signature, SyntaxShape,
};
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#[cfg(test)]
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::Expression)),
"equals sign followed by value",
)
}
fn run(
&self,
_context: &nu_protocol::engine::EvaluationContext,
_call: &nu_protocol::ast::Call,
_input: nu_protocol::Value,
) -> Result<nu_protocol::Value, nu_protocol::ShellError> {
todo!()
}
}
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#[test]
pub fn parse_int() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (block, err) = parse(&mut working_set, None, b"3", true);
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assert!(err.is_none());
assert!(block.len() == 1);
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match &block[0] {
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Statement::Pipeline(Pipeline { expressions }) => {
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assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Int(3),
..
}
))
}
_ => panic!("No match"),
}
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}
#[test]
pub fn parse_call() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'));
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working_set.add_decl(sig.predeclare());
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let (block, err) = parse(&mut working_set, None, b"foo", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
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Statement::Pipeline(Pipeline { expressions }) => {
assert_eq!(expressions.len(), 1);
if let Expression {
expr: Expr::Call(call),
..
} = &expressions[0]
{
assert_eq!(call.decl_id, 0);
}
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}
_ => panic!("not a call"),
}
}
#[test]
pub fn parse_call_missing_flag_arg() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'));
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo --jazz", true);
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assert!(matches!(err, Some(ParseError::MissingFlagParam(..))));
}
#[test]
pub fn parse_call_missing_short_flag_arg() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'));
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo -j", true);
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assert!(matches!(err, Some(ParseError::MissingFlagParam(..))));
}
#[test]
pub fn parse_call_too_many_shortflag_args() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo")
.named("--jazz", SyntaxShape::Int, "jazz!!", Some('j'))
.named("--math", SyntaxShape::Int, "math!!", Some('m'));
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo -mj", true);
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assert!(matches!(
err,
Some(ParseError::ShortFlagBatchCantTakeArg(..))
));
}
#[test]
pub fn parse_call_unknown_shorthand() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").switch("--jazz", "jazz!!", Some('j'));
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo -mj", true);
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assert!(matches!(err, Some(ParseError::UnknownFlag(..))));
}
#[test]
pub fn parse_call_extra_positional() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").switch("--jazz", "jazz!!", Some('j'));
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo -j 100", true);
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assert!(matches!(err, Some(ParseError::ExtraPositional(..))));
}
#[test]
pub fn parse_call_missing_req_positional() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").required("jazz", SyntaxShape::Int, "jazz!!");
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo", true);
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assert!(matches!(err, Some(ParseError::MissingPositional(..))));
}
#[test]
pub fn parse_call_missing_req_flag() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let sig = Signature::build("foo").required_named("--jazz", SyntaxShape::Int, "jazz!!", None);
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working_set.add_decl(sig.predeclare());
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let (_, err) = parse(&mut working_set, None, b"foo", true);
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assert!(matches!(err, Some(ParseError::MissingRequiredFlag(..))));
}
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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);
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let (block, err) = parse(&mut working_set, None, b"0..10", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[test]
fn parse_exclusive_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (block, err) = parse(&mut working_set, None, b"0..<10", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[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!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
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#[test]
fn parse_subexpression_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (block, err) = parse(&mut working_set, None, b"(3 - 3)..<(8 + 2)", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[test]
fn parse_variable_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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working_set.add_decl(Box::new(Let));
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let (block, err) = parse(&mut working_set, None, b"let a = 2; $a..10", true);
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assert!(err.is_none());
assert!(block.len() == 2);
match &block[1] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[test]
fn parse_subexpression_variable_range() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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working_set.add_decl(Box::new(Let));
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let (block, err) = parse(&mut working_set, None, b"let a = 2; $a..<($a + 10)", true);
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assert!(err.is_none());
assert!(block.len() == 2);
match &block[1] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
RangeOperator {
inclusion: RangeInclusion::RightExclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[test]
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fn parse_right_unbounded_range() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (block, err) = parse(&mut working_set, None, b"0..", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
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None,
None,
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RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[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!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
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None,
None,
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
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#[test]
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fn parse_negative_range() {
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let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (block, err) = parse(&mut working_set, None, b"-10..-3", true);
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assert!(err.is_none());
assert!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
None,
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Some(_),
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RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
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#[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!(block.len() == 1);
match &block[0] {
Statement::Pipeline(Pipeline { expressions }) => {
assert!(expressions.len() == 1);
assert!(matches!(
expressions[0],
Expression {
expr: Expr::Range(
Some(_),
Some(_),
Some(_),
RangeOperator {
inclusion: RangeInclusion::Inclusive,
..
}
),
..
}
))
}
_ => panic!("No match"),
}
}
#[test]
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fn bad_parse_does_crash() {
let engine_state = EngineState::new();
let mut working_set = StateWorkingSet::new(&engine_state);
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let (_, err) = parse(&mut working_set, None, b"(0)..\"a\"", true);
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assert!(err.is_some());
}
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}