106 lines
2.9 KiB
Rust
106 lines
2.9 KiB
Rust
//! Unit tests for infix operator parsing within expressions.
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use crate::{Datum, Expr, InfixOp};
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#[test]
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fn add_op_parses() {
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assert_eq!(
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// https://xkcd.com/3184/
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Expr::try_from("six + 7"),
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Ok(Expr::Infix {
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lhs: Box::new(Expr::ObjName(vec!["six".to_owned()])),
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op: InfixOp::Add,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(7.into())))),
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})
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);
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}
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#[test]
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fn mult_op_parses() {
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assert_eq!(
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Expr::try_from("six * 7"),
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Ok(Expr::Infix {
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lhs: Box::new(Expr::ObjName(vec!["six".to_owned()])),
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op: InfixOp::Mult,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(7.into())))),
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})
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);
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}
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#[test]
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fn arith_precedence() {
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assert_eq!(
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Expr::try_from("(1 + 2) * 3 + 4"),
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Ok(Expr::Infix {
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lhs: Box::new(Expr::Infix {
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lhs: Box::new(Expr::Infix {
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lhs: Box::new(Expr::Literal(Datum::Numeric(Some(1.into())))),
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op: InfixOp::Add,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(2.into())))),
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}),
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op: InfixOp::Mult,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(3.into())))),
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}),
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op: InfixOp::Add,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(4.into())))),
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})
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);
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assert_eq!(
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Expr::try_from("1 - 2 / (3 - 4)"),
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Ok(Expr::Infix {
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lhs: Box::new(Expr::Literal(Datum::Numeric(Some(1.into())))),
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op: InfixOp::Sub,
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rhs: Box::new(Expr::Infix {
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lhs: Box::new(Expr::Literal(Datum::Numeric(Some(2.into())))),
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op: InfixOp::Div,
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rhs: Box::new(Expr::Infix {
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lhs: Box::new(Expr::Literal(Datum::Numeric(Some(3.into())))),
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op: InfixOp::Sub,
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rhs: Box::new(Expr::Literal(Datum::Numeric(Some(4.into())))),
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}),
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})
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})
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);
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}
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#[test]
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fn is_null_parses() {
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assert_eq!(
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Expr::try_from("my_var is null"),
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Ok(Expr::Nullness {
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is_null: true,
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expr: Box::new(Expr::ObjName(vec!["my_var".to_owned()]))
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}),
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);
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}
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#[test]
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fn is_not_null_parses() {
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assert_eq!(
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Expr::try_from("my_var is not null"),
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Ok(Expr::Nullness {
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is_null: false,
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expr: Box::new(Expr::ObjName(vec!["my_var".to_owned()]))
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}),
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);
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}
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#[test]
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fn not_parses() {
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assert_eq!(
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Expr::try_from("not my_var"),
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Ok(Expr::Not(Box::new(Expr::ObjName(vec![
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"my_var".to_owned()
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])))),
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);
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}
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#[test]
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fn repeated_nots_parse() {
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assert_eq!(
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Expr::try_from("not not my_var"),
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Ok(Expr::Not(Box::new(Expr::Not(Box::new(Expr::ObjName(
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vec!["my_var".to_owned()]
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)))))),
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);
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}
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