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Add subject and test for the exercise `circle`

content-update
Augusto 3 years ago
parent
commit
c4ef9046d4
  1. 426
      rust/tests/circle_test/Cargo.lock
  2. 10
      rust/tests/circle_test/Cargo.toml
  3. 70
      rust/tests/circle_test/src/main.rs
  4. 95
      subjects/circle/README.md

426
rust/tests/circle_test/Cargo.lock diff.generated

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10
rust/tests/circle_test/Cargo.toml

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[package]
name = "circle_test"
version = "0.1.0"
authors = ["Augusto <aug.ornelas@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
circle = { path = "../../../../rust-piscine-solutions/circle"}

70
rust/tests/circle_test/src/main.rs

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//use raster::{Color, Image};
use circle::{Circle, Point};
// Create a structure that represents a circle
// using the radius and the center point
fn main() {
let circle = Circle::new(500.0, 500.0, 150.0);
let circle1 = Circle {
center: Point { x: 80.0, y: 115.0 },
radius: 30.0,
};
let point_a = Point { x: 1.0, y: 1.0 };
let point_b = Point { x: 0.0, y: 0.0 };
println!("circle = {:?} area = {}", circle, circle.area());
println!("circle = {:?} diameter = {}", circle, circle.diameter());
println!("circle1 = {:?} diameter = {}", circle1, circle1.diameter());
println!(
"circle and circle1 intersect = {}",
circle.intersect(&circle1)
);
println!(
"distance between {:?} and {:?} is {}",
point_a,
point_b,
point_a.distance(&point_b)
);
}
#[allow(dead_code)]
fn approx_eq(a: f64, b: f64) -> bool {
(a - b).abs() < f64::EPSILON
}
#[test]
fn test_new_circle() {
let circle = Circle::new(500.0, 400.0, 150.0);
assert!(approx_eq(circle.radius, 150.0));
assert!(approx_eq(circle.center.x, 500.0));
assert!(approx_eq(circle.center.y, 400.0));
}
#[test]
fn test_distance() {
let a = Point { x: 0.0, y: 1.0 };
let b = Point { x: 0.0, y: 0.0 };
assert!(approx_eq(a.distance(&b), 1.0));
let a = Point { x: 1.0, y: 0.0 };
let b = Point { x: 0.0, y: 0.0 };
assert!(approx_eq(a.distance(&b), 1.0));
let a = Point { x: 1.0, y: 1.0 };
let b = Point { x: 0.0, y: 0.0 };
assert!(approx_eq(a.distance(&b), f64::sqrt(2.0)));
}
#[test]
fn test_area() {
let circle = Circle::new(500.0, 400.0, 150.0);
assert!(approx_eq(circle.area(), 70685.83470577035));
}
#[test]
fn test_intersection() {
let circle = Circle::new(500.0, 500.0, 150.0);
let circle1 = Circle::new(80.0, 115.0, 30.0);
assert!(!circle.intersect(&circle1));
let circle = Circle::new(100.0, 300.0, 150.0);
let circle1 = Circle::new(80.0, 115.0, 100.0);
assert!(circle.intersect(&circle1));
}

95
subjects/circle/README.md

@ -0,0 +1,95 @@
## circle
### Instructions
Create the structures `Circle` and `Point` and the methods necessary for the code in [usage](#usage) to compile and run giving the expected result.
Methods:
- Point;
distance()
- Circle:
diameter -> returns the diameter of the circle
area -> returns the area of the circle
intersection -> returns true if the 2 circles intersect
Associated Functions
- Circle:
new -> receives three 64 bits floating point numbers in the following
order: x, y and radius (x and y are the coordinates of the center).
and returns a new circle
### Expected Functions and Structures
This snippets are incomplete and it's part of the exercise to discover the how to complete them
```rust
struct Circle {
center //..
radius //..
}
struct Point {
// ...
}
// Point
fn distance(p1, p2) -> _ {
}
// Circle
fn new(x: f64, y: f64, radius: f64) -> Circle {
}
fn diameter(_) -> _ {
}
fn area() -> _ {
}
```
### Usage
Here is a program to test your function
```rust
use std::f64::consts;
use circle::{Circle, Point};
fn main() {
let circle = Circle::new(500.0, 500.0, 150.0);
let circle1 = Circle {
center: Point { x: 80.0, y: 115.0 },
radius: 30.0,
};
let point_a = Point { x: 1.0, y: 1.0 };
let point_b = Point { x: 0.0, y: 0.0 };
println!("circle = {:?} area = {}", circle, circle.area());
println!("circle = {:?} diameter = {}", circle, circle.diameter());
println!("circle1 = {:?} diameter = {}", circle1, circle1.diameter());
println!(
"circle and circle1 intersect = {}",
circle.intersect(&circle1)
);
println!(
"distance between {:?} and {:?} is {}",
point_a,
point_b,
point_a.distance(&point_b)
);
}
```
And its output
```console
student@ubuntu:~/[[ROOT]]/test$ cargo run
circle = Circle { center: Point { x: 500.0, y: 500.0 }, radius: 150.0 } area = 70685.83470577035
circle = Circle { center: Point { x: 500.0, y: 500.0 }, radius: 150.0 } diameter = 300
circle1 = Circle { center: Point { x: 80.0, y: 115.0 }, radius: 30.0 } diameter = 60
circle and circle1 intersect = false
distance between Point { x: 1.0, y: 1.0 } and Point { x: 0.0, y: 0.0 } is 1.4142135623730951
student@ubuntu:~/[[ROOT]]/test$
```
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