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import core::*;
use std;
import std::tri;
import std::four;
fn eq1(a: four::t, b: four::t) -> bool { four::eq(a , b) }
fn ne1(a: four::t, b: four::t) -> bool { four::ne(a , b) }
fn eq2(a: four::t, b: four::t) -> bool { eq1( a, b ) && eq1( b, a ) }
#[test]
fn test_four_req_eq() {
four::all_values { |a|
four::all_values { |b|
assert if a == b { eq1( a, b ) } else { ne1( a, b ) };
}
}
}
#[test]
fn test_four_and_symmetry() {
four::all_values { |a|
four::all_values { |b|
assert eq1( four::and(a ,b), four::and(b, a) );
}
}
}
#[test]
fn test_four_xor_symmetry() {
four::all_values { |a|
four::all_values { |b|
assert eq1( four::and(a ,b), four::and(b, a) );
}
}
}
#[test]
fn test_four_or_symmetry() {
four::all_values { |a|
four::all_values { |b|
assert eq1( four::or(a ,b), four::or(b, a) );
}
}
}
fn to_tup(v: four::t) -> (bool, bool) {
alt v {
0u8 { (false, false) }
1u8 { (false, true) }
2u8 { (true, false) }
3u8 { (true, true) }
}
}
#[test]
fn test_four_not() {
four::all_values { |a|
let (x, y) = to_tup(a);
assert to_tup(four::not(a)) == (y, x);
};
}
#[test]
fn test_four_and() {
four::all_values { |a|
four::all_values { |b|
let (y1, x1) = to_tup(a);
let (y2, x2) = to_tup(b);
let (y3, x3) = to_tup(four::and(a, b));
assert (x3, y3) == (x1 && x2, y1 || y2);
}
};
}
#[test]
fn test_four_or() {
four::all_values { |a|
four::all_values { |b|
let (y1, x1) = to_tup(a);
let (y2, x2) = to_tup(b);
let (y3, x3) = to_tup(four::or(a, b));
assert (x3, y3) == (x1 || x2, y1 && y2);
}
};
}
#[test]
fn test_four_implies() {
four::all_values { |a|
four::all_values { |b|
let (_, x1) = to_tup(a);
let (y2, x2) = to_tup(b);
let (y3, x3) = to_tup(four::implies(a, b));
assert (x3, y3) == (!x1 || x2, x1 && y2);
}
};
}
#[test]
fn test_four_is_true() {
assert !four::is_true(four::none);
assert !four::is_true(four::false);
assert four::is_true(four::true);
assert four::is_true(four::both);
}
#[test]
fn test_four_is_false() {
assert four::is_false(four::none);
assert four::is_false(four::false);
assert !four::is_false(four::true);
assert !four::is_false(four::both);
}
#[test]
fn test_four_from_str() {
four::all_values { |v|
assert eq1( v, four::from_str(four::to_str(v)) );
}
}
#[test]
fn test_four_to_str() {
assert four::to_str(four::none) == "none";
assert four::to_str(four::false) == "false";
assert four::to_str(four::true) == "true" ;
assert four::to_str(four::both) == "both";
}
#[test]
fn test_four_to_tri() {
assert tri::eq( four::to_trit(four::true), tri::true );
assert tri::eq( four::to_trit(four::false), tri::false );
assert tri::eq( four::to_trit(four::none), tri::unknown );
log four::to_trit(four::both);
assert tri::eq( four::to_trit(four::both), tri::unknown );
}
#[test]
fn test_four_to_bit() {
four::all_values { |v|
assert four::to_bit(v) == if four::is_true(v) { 1u8 } else { 0u8 };
}
}
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