Add molar flux quantity and related units.

Resolves #320

Author: crystal-growth

src/si/mod.rs

@@ -84,6 +84,7 @@ system! {
         mass_rate::MassRate,
         molar_concentration::MolarConcentration,
         molar_energy::MolarEnergy,
+        molar_flux::MolarFlux,
         molar_heat_capacity::MolarHeatCapacity,
         molar_mass::MolarMass,
         momentum::Momentum,

src/si/molar_flux.rs

@@ -0,0 +1,51 @@
+//! Molar flux (base unit mole per square meter second, m⁻² · s⁻¹ · mol).
+
+quantity! {
+    /// Molar flux (base unit mole per square meter second, m⁻² · s⁻¹ · mol).
+    quantity: MolarFlux; "molar flux";
+    /// Dimension of molar flux, L⁻²T⁻¹N (base unit mole per square meter second, m⁻² · s⁻¹ · mol).
+    dimension: ISQ<
+        N2,     // length
+        Z0,     // mass
+        N1,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        P1,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @mole_per_square_meter_second: prefix!(none); "mol/(m² · s)",
+            "mole per square meter second", "moles per square meter second";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::amount_of_substance as aos;
+        use crate::si::molar_flux as mf;
+        use crate::si::quantities::*;
+        use crate::si::time as t;
+        use crate::si::area as area;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: MolarFlux<V> = AmountOfSubstance::new::<aos::mole>(V::one())
+                / Time::new::<t::second>(V::one())
+                / Area::new::<area::square_meter>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<aos::mole, t::second, area::square_meter, mf::mole_per_square_meter_second>();
+
+            fn test<N: aos::Conversion<V>, T: t::Conversion<V>, A: area::Conversion<V>, R: mf::Conversion<V>>() {
+                Test::assert_approx_eq(&MolarFlux::new::<R>(V::one()),
+                    &(AmountOfSubstance::new::<N>(V::one())
+                        / Time::new::<T>(V::one())
+                        / Area::new::<A>(V::one())));
+            }
+        }
+    }
+}