hayami 0.2.1

A simple, general use symbol table.
Documentation 
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/*!
Functions for testing `SymbolMap` implementations
*/
use super::*;

#[allow(unused)]
pub fn basic_symbol_table_test<S: SymbolMap<&'static str, Value = usize>>(mut symbols: S) {
    assert!(symbols.is_empty());
    assert!(!symbols.contains_key("x"));
    assert!(!symbols.contains_key("y"));
    symbols.insert("x", 4);
    assert!(symbols.contains_key("x"));
    assert!(!symbols.contains_key("y"));
    assert_eq!(symbols.get("x"), Some(&4));
    symbols.insert("x", 3);
    assert_eq!(symbols.get("x"), Some(&3));
    assert!(symbols.contains_key("x"));
    assert!(!symbols.contains_key("y"));
    symbols.insert("y", 7);
    assert!(symbols.contains_key("x"));
    assert!(symbols.contains_key("y"));
    assert_eq!(symbols.get("y"), Some(&7));
    symbols.push();
    symbols.insert("x", 9);
    symbols.insert("z", 1);
    assert_eq!(symbols.get("x"), Some(&9));
    assert_eq!(symbols.get("y"), Some(&7));
    assert_eq!(symbols.get("z"), Some(&1));
    assert!(symbols.contains_key("z"));
    assert!(symbols.contains_key("x"));
    symbols.insert("z", 33);
    assert_eq!(symbols.get("x"), Some(&9));
    assert_eq!(symbols.get("y"), Some(&7));
    assert_eq!(symbols.get("z"), Some(&33));
    assert!(symbols.contains_key("z"));
    assert!(symbols.contains_key("x"));
    symbols.pop();
    assert!(!symbols.contains_key("z"))
}