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Add slice unit tests
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@ -1,21 +1,26 @@
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use crate::pattern::*;
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use crate::Vector;
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#[derive(derive_more::Constructor)]
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pub struct SliceFactory {
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child: Box<dyn PatternFactory>,
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width: f32,
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rest: f32,
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slices: u8,
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}
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#[derive(derive_more::Constructor)]
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pub struct Slice {
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child: Box<dyn Pattern>,
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width: f32,
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rest: f32,
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}
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impl SliceFactory {
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pub fn new(child: Box<dyn PatternFactory>, slices: u8) -> Self {
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impl PatternFactory for SliceFactory {
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fn create(&self, config: &Config) -> Box<dyn Pattern> {
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Box::new(Slice::new(self.child.create(config), self.slices))
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}
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}
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impl Slice {
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pub fn new(child: Box<dyn Pattern>, slices: u8) -> Self {
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let width = 1.0 / slices as f32;
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let rest = 1.0 - width;
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@ -23,14 +28,91 @@ impl SliceFactory {
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}
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}
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impl PatternFactory for SliceFactory {
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fn create(&self, config: &Config) -> Box<dyn Pattern> {
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Box::new(Slice::new(self.child.create(config), self.width, self.rest))
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}
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}
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impl Pattern for Slice {
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fn sample(&self, pos: Vector) -> f32 {
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(self.child.sample(pos) - self.rest) / self.width
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use crate::MockPatternFactory;
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use mockall::predicate::eq;
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#[test]
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fn create_config_correct() {
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let config = Config {
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size: Vector::new(7.0, 3.0),
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step: 0.2,
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};
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let mut child = MockPatternFactory::new();
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child
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.expect_create()
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.with(eq(config))
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.once()
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.returning(|_| Box::new(MockPattern::new()));
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SliceFactory::new(Box::new(child), 4).create(&config);
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}
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#[test]
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fn sample_starts_with_one() {
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let mut child = MockPatternFactory::new();
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child.expect_create().returning(|_| {
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let mut sampler = MockPattern::new();
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sampler.expect_sample().return_const(1.0);
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Box::new(sampler)
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});
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let sampler = SliceFactory::new(Box::new(child), 4).create(&Config::default());
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assert_eq!(1.0, sampler.sample(Vector::default()));
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}
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#[test]
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fn sample_ends_with_zero() {
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let mut child = MockPatternFactory::new();
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child.expect_create().returning(|_| {
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let mut sampler = MockPattern::new();
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sampler.expect_sample().return_const(0.75);
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Box::new(sampler)
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});
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let sampler = SliceFactory::new(Box::new(child), 4).create(&Config::default());
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assert_eq!(0.0, sampler.sample(Vector::default()));
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}
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#[test]
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fn sample_values_beyond_end_are_negative() {
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let mut child = MockPatternFactory::new();
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child.expect_create().returning(|_| {
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let mut sampler = MockPattern::new();
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sampler.expect_sample().return_const(0.5);
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Box::new(sampler)
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});
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let sampler = SliceFactory::new(Box::new(child), 4).create(&Config::default());
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assert!(sampler.sample(Vector::default()) < 0.0);
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}
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#[test]
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fn sample_pos_correct() {
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let mut child = MockPatternFactory::new();
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child.expect_create().once().returning(|_| {
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let mut sampler = MockPattern::new();
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sampler
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.expect_sample()
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.with(eq(Vector::new(3.0, 5.0)))
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.once()
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.return_const(0.0);
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Box::new(sampler)
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});
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let sampler = SliceFactory::new(Box::new(child), 3).create(&Config::default());
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sampler.sample(Vector::new(3.0, 5.0));
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}
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}
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