expy 0.0.2

Embeddable & extensible expression evaluator
Documentation 
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//! Tests for the context type.
//!
//! Doesn't include testing for particular function or operator implementations;
//! these are relegated to crate-level tests.

use crate::testing::asserts::{*, assert_eq};

use super::*;


#[test]
fn empty() {
    let ctx = Context::empty();
    assert_eq!(ctx.name_count(), 0);
}

#[test]
fn default() {
    assert_gt!(Context::new().name_count(), 0);
    assert_gt!(Context::default().name_count(), 0);
}

#[test]
fn namespace_different_types() {
    let mut ctx = Context::empty();

    ctx.set(Ident::from("foo"), false);
    assert_eq!(ctx.get("foo").unwrap(), &false.into());

    ctx.set(Ident::from("bar"), 42);
    assert_eq!(ctx.get(Ident::from("bar")).unwrap(), &42.into());
}

#[test]
fn namespace_hierarchy() {
    let mut ctx = Context::empty();
    ctx.set("foo", 4);

    {
        let mut child = ctx.child();
        assert_eq!(child.resolve("foo").unwrap(), &4.into());

        child.set("bar", 42);
        assert_eq!(child.resolve("bar").unwrap(), &42.into());

        child.set("foo", 13);
        assert_eq!(child.resolve("foo").unwrap(), &13.into());
    }

    assert_eq!(ctx.resolve("foo").unwrap(), &4.into());
    assert!(ctx.resolve("bar").is_err());
}