Rust: Test to verify existence of colour methods

We only need to test one flavour, as we just need to make sure the
methods exists because if the correct method exists it is guaurenteed to
access to correctly named field

rust/src/flavour.rs

@@ -166,6 +166,38 @@ mod tests {
     use crate::flavour_colours::validate_colours;
     use indoc::indoc;
 
+    #[test]
+    fn verify_colour_methods() {
+        // We only need to test one flavour, as we just need to make sure the methods exists
+        // Because if the correct method exists it is guaurenteed to access to correctly named field
+        let _rosewater = Flavour::Latte.rosewater();
+        let _flamingo = Flavour::Latte.flamingo();
+        let _pink = Flavour::Latte.pink();
+        let _mauve = Flavour::Latte.mauve();
+        let _red = Flavour::Latte.red();
+        let _maroon = Flavour::Latte.maroon();
+        let _peach = Flavour::Latte.peach();
+        let _yellow = Flavour::Latte.yellow();
+        let _green = Flavour::Latte.green();
+        let _teal = Flavour::Latte.teal();
+        let _sky = Flavour::Latte.sky();
+        let _sapphire = Flavour::Latte.sapphire();
+        let _blue = Flavour::Latte.blue();
+        let _lavender = Flavour::Latte.lavender();
+        let _text = Flavour::Latte.text();
+        let _subtext1 = Flavour::Latte.subtext1();
+        let _subtext0 = Flavour::Latte.subtext0();
+        let _overlay2 = Flavour::Latte.overlay2();
+        let _overlay1 = Flavour::Latte.overlay1();
+        let _overlay0 = Flavour::Latte.overlay0();
+        let _surface2 = Flavour::Latte.surface2();
+        let _surface1 = Flavour::Latte.surface1();
+        let _surface0 = Flavour::Latte.surface0();
+        let _base = Flavour::Latte.base();
+        let _mantle = Flavour::Latte.mantle();
+        let _crust = Flavour::Latte.crust();
+    }
+
     #[test]
     fn validate_latte_colours() {
         validate_colours(