Merge pull request #160 from dunmatt/jerkingIt

Added AngularJerk.

src/si/angular_jerk.rs

@@ -0,0 +1,50 @@
+//! Angular jerk (base unit radian per second cubed, s⁻³).
+
+quantity! {
+    /// Angular jerk (base unit radian per second cubed, s⁻³).
+    quantity: AngularJerk; "angular jerk";
+    /// Dimension of angular jerk, T⁻³ (base unit radian per second cubed, s⁻³).
+    dimension: ISQ<
+        Z0,     // length
+        Z0,     // mass
+        N3,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    kind: dyn (::si::marker::AngleKind);
+    units {
+        /// Derived unit of angular jerk.
+        @radian_per_second_cubed: 1.0; "rad/s³", "radian per second cubed",
+            "radians per second cubed";
+        @degree_per_second_cubed: 1.745_329_251_994_329_5_E-2; "°/s³",
+            "degree per second cubed", "degrees per second cubed";
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    storage_types! {
+        use num::One;
+        use si::angle as a;
+        use si::angular_jerk as aj;
+        use si::quantities::*;
+        use si::time as t;
+        use tests::Test;
+
+        #[test]
+        fn check_units() {
+            test::<a::radian, t::second, aj::radian_per_second_cubed>();
+            test::<a::degree, t::second, aj::degree_per_second_cubed>();
+
+            fn test<A: a::Conversion<V>, T: t::Conversion<V>, R: aj::Conversion<V>>() {
+                let cubic_second = Time::new::<T>(V::one()) *
+                                   Time::new::<T>(V::one()) *
+                                   Time::new::<T>(V::one());
+
+                Test::assert_approx_eq(&AngularJerk::new::<R>(V::one()),
+                    &(Angle::new::<A>(V::one()) / cubic_second).into());
+            }
+        }
+    }
+}

src/si/mod.rs

@@ -49,6 +49,7 @@ system! {
         amount_of_substance::AmountOfSubstance,
         angle::Angle,
         angular_acceleration::AngularAcceleration,
+        angular_jerk::AngularJerk,
         angular_velocity::AngularVelocity,
         area::Area,
         available_energy::AvailableEnergy,