calcucalc 0.2.1

A general-purpose calculus library written in Rust.
Documentation 
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use crate::Monomial;
use crate::tests::monomial_statics::*;

#[test]
fn test_monomial_identity() {
    assert_eq!(MONOMIAL_1_2, Monomial { c: 1_f64, e: 2_f64 },);
    assert_ne!(MONOMIAL_2_2, Monomial { c: 0_f64, e: 1_f64 },);
    assert_ne!(MONOMIAL_2_2, MONOMIAL_3_3);
    assert_eq!(MONOMIAL_PI_0, MONOMIAL_PI_0);
    assert_ne!(MONOMIAL_PI_0, MONOMIAL_1_2);
}

#[test]
fn test_monomial_fields_access() {
    let m0 = &MONOMIAL_1_0;
    assert_eq!(m0.c, 1_f64);
    assert_eq!(m0.e, 0_f64);

    let m1 = &MONOMIAL_N34P2_389651P6516;
    assert_eq!(m1.c, -34.2_f64);
    assert_eq!(m1.e, 389651.6516_f64);

    let m2 = &MONOMIAL_N4_0;
    assert_eq!(m2.c, -4_f64);
    assert_eq!(m2.e, 0_f64);

    let m3 = &MONOMIAL_241346513P3452231_N3954398000P8481;
    assert_eq!(m3.c, 241346513.3452231_f64);
    assert_eq!(m3.e, -3954398000.8481_f64);

    assert_eq!(MONOMIAL_1_2.c, 1_f64);
    assert_eq!(MONOMIAL_1_2.e, 2_f64);
    assert_eq!(MONOMIAL_PI_0.c, 3.14159265358979323846);
    assert_eq!(MONOMIAL_PI_0.e, 0_f64);
    assert_eq!(MONOMIAL_E_0.c, 2.71828182845904523536);
    assert_eq!(MONOMIAL_E_0.e, 0_f64);
}

#[test]
fn test_values_for_monomial() {
    let m1 = &MONOMIAL_1_1;
    assert_eq!(m1.value(2_f64), 2_f64);
    assert_eq!(m1.value(3_f64), 3_f64);
    assert_eq!(m1.value(4_f64), 4_f64);
    assert_eq!(m1.value(5_f64), 5_f64);

    let m2 = &MONOMIAL_2_2;
    assert_eq!(m2.value(2_f64), 8_f64);
    assert_eq!(m2.value(3_f64), 18_f64);
    assert_eq!(m2.value(4_f64), 32_f64);
    assert_eq!(m2.value(5_f64), 50_f64);

    let m3 = &MONOMIAL_0P5_N1;
    assert_eq!(m3.value(2.0), 0.25);
    assert_eq!(m3.value(3.0), 0.16666666666666666);
    assert_eq!(m3.value(4.0), 0.125);
    assert_eq!(m3.value(5.0), 0.1);
    assert_eq!(m3.value(0.5), 1.0);
    assert_eq!(m3.value(0.25), 2.0);
    assert_eq!(m3.value(0.125), 4.0);
    assert_eq!(m3.value(0.0625), 8.0);
    assert_eq!(m3.value(0.03125), 16.0);
    assert_eq!(m3.value(0.015625), 32.0);
    assert_eq!(m3.value(-1.0), -0.5);
    assert_eq!(m3.value(-2.0), -0.25);
    assert_eq!(m3.value(-3.0), -0.16666666666666666);
    assert_eq!(m3.value(-4.0), -0.125);
}

#[test]
fn test_add_monomial_of_same_power() {
    let m1 = &MONOMIAL_1_1;
    let m2 = &MONOMIAL_2_1;
    let m3 = &MONOMIAL_3_1;
    assert_eq!(*m3, m1.add_monomial_of_same_power(&m2).unwrap());

    let m4 = &MONOMIAL_45_250;
    let m5 = &MONOMIAL_57_250;
    let m6 = &MONOMIAL_102_250;
    assert_eq!(*m6, m4.add_monomial_of_same_power(&m5).unwrap());

    let m7 = &MONOMIAL_1_N11;
    let m8 = &MONOMIAL_2_N11;
    let m9 = &MONOMIAL_3_N11;
    assert_eq!(*m9, m7.add_monomial_of_same_power(&m8).unwrap());

    let m10 = &MONOMIAL_1_0;
    let m11 = &MONOMIAL_2_0;
    let m12 = &MONOMIAL_3_0;
    assert_eq!(*m12, m10.add_monomial_of_same_power(&m11).unwrap());
}

#[test]
#[should_panic(expected = "Cannot add monomials with different powers of x.")]
fn test_panic_on_adding_monomial_of_different_power0() {
    let m1 = &MONOMIAL_1_1;
    let m2 = &MONOMIAL_2_2;
    let _result = m1.add_monomial_of_same_power(&m2).unwrap();
}

#[test]
#[should_panic(expected = "Cannot add monomials with different powers of x.")]
fn test_panic_on_adding_monomial_of_different_power1() {
    let m3 = &MONOMIAL_1_0;
    let m4 = &MONOMIAL_2_1;
    let _result = m3.add_monomial_of_same_power(&m4).unwrap();
}

#[test]
#[should_panic(expected = "Cannot add monomials with different powers of x.")]
fn test_panic_on_adding_monomial_of_different_power2() {
    let m5 = &MONOMIAL_1_N1;
    let m6 = &MONOMIAL_2_0;
    let _result = m5.add_monomial_of_same_power(&m6).unwrap();
}

#[test]
#[should_panic(expected = "Cannot add monomials with different powers of x.")]
fn test_panic_on_adding_monomial_of_different_power3() {
    let m7 = &MONOMIAL_1_N1;
    let m8 = &MONOMIAL_2_1;
    let _result = m7.add_monomial_of_same_power(&m8).unwrap();
}

#[test]
fn test_multiply_monomial() {
    let m1 = &MONOMIAL_2_1;
    let m2 = &MONOMIAL_3_2;
    let m3 = &MONOMIAL_6_3;
    assert_eq!(*m3, m1.multiply_monomial(&m2));

    let m4 = &MONOMIAL_45_250;
    let m5 = &MONOMIAL_57_250;
    let m6 = &MONOMIAL_2565_500;
    assert_eq!(*m6, m4.multiply_monomial(&m5));

    let m7 = &MONOMIAL_1_N11;
    let m8 = &MONOMIAL_2_N11;
    let m9 = &MONOMIAL_2_N22;
    assert_eq!(*m9, m7.multiply_monomial(&m8));

    let m10 = &MONOMIAL_1_0;
    let m11 = &MONOMIAL_2_0;
    let m12 = &MONOMIAL_2_0;
    assert_eq!(*m12, m10.multiply_monomial(&m11));

    let m13 = &MONOMIAL_1_0;
    let m14 = &MONOMIAL_0_500;
    let m15 = &MONOMIAL_0_500;
    assert_eq!(*m15, m13.multiply_monomial(&m14));

    let m16 = &MONOMIAL_0_0;
    let m17 = &MONOMIAL_0_0;
    let m18 = &MONOMIAL_0_0;
    assert_eq!(*m18, m16.multiply_monomial(&m17));
}

#[test]
fn test_trig_on_monomial() {
    let m1 = Monomial { c: 1.0, e: 1.0 };
    assert_eq!(f64::sin(m1.value(1.0)), 0.8414709848078965);

    let m2 = Monomial { c: 1.0, e: 2.0 };
    assert_eq!(f64::cos(m2.value(1.0)), 0.5403023058681398);

    let m3 = Monomial { c: 1.0, e: 3.0 };
    assert_eq!(f64::tan(m3.value(1.5)), 0.23774039376214381);
}

#[test]
fn test_monomial_default() {
    let m: Monomial = Default::default();
    assert_eq!(m.c, 0.0);
    assert_eq!(m.e, 0.0);
}