chore: add code coverage (#10)

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/test.yml

@@ -6,11 +6,13 @@ on:
     paths:
       - '**.rs'
       - 'src/**.rs'
+      - '.github/workflows/**.yml'
   pull_request:
     branches: [ "main" ]
     paths:
       - '**.rs'
       - 'src/**.rs'
+      - '.github/workflows/**.yml'
 
 env:
   CI: true
@@ -26,11 +28,19 @@ jobs:
       with:
         toolchain: 1.84.0
         components: clippy, rustfmt
+    - name: Install tarpaulin
+      run: cargo install --locked cargo-tarpaulin
     - name: Run build
       run: cargo build --locked
     - name: Run clippy
       run: cargo clippy --all-targets --all-features --no-deps -- -D warnings
-    - name: Run rustfmt
+    - name: Run lint
       run: cargo fmt -- --check
     - name: Run tests
-      run: cargo test
+      run: cargo tarpaulin --out xml
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v3
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      with:
+        file: ./cobertura.xml

Cargo.toml

@@ -13,4 +13,4 @@ repository = "https://github.com/chargetrip/supercluster-rs"
 
 [dependencies]
 geojson = "0.24.1"
-serde_json = "1.0.135"
+serde_json = "1.0.137"

README.md

@@ -11,6 +11,7 @@ This crate was initially inspired by Mapbox's supercluster [blog post](https://b
 [![crate](https://img.shields.io/crates/v/supercluster.svg)](https://crates.io/crates/supercluster)
 ![downloads](https://img.shields.io/crates/d/supercluster)
 ![GitHub](https://img.shields.io/github/license/chargetrip/supercluster-rs)
+[![codecov](https://codecov.io/gh/chargetrip/supercluster-rs/graph/badge.svg?token=0S31CZY2ZJ)](https://codecov.io/gh/chargetrip/supercluster-rs)
 
 ![Features](https://cloud.githubusercontent.com/assets/25395/11857351/43407b46-a40c-11e5-8662-e99ab1cd2cb7.gif)
 
@@ -96,30 +97,50 @@ fn main() {
 
 ## Contributing
 
-Build:
+Contributions from the community are always welcome! Here are some ways you can contribute:
+
+### Reporting Bugs
+
+If you encounter any bugs, please [submit an issue](https://github.com/chargetrip/supercluster-rs/issues) with detailed information about the problem and steps to reproduce it.
+
+### Feature Requests
+
+If you have ideas for new features, feel free to [submit an issue](https://github.com/chargetrip/supercluster-rs/issues) with a detailed description of the feature and its potential use cases.
+
+### Build
+
+To build the project, run:
 
 ```bash
 cargo build
 ```
 
-Test:
+### Test
+
+To run the tests, use:
 
 ```bash
 cargo test
 ```
 
-Run [clippy](https://github.com/rust-lang/rust-clippy):
+### Lint
+
+Run [clippy](https://github.com/rust-lang/rust-clippy) to lint the code:
 
 ```bash
 cargo clippy --all-targets --all-features --no-deps -- -D warnings
 ```
 
-Run [rustfmt](https://github.com/rust-lang/rustfmt):
+### Format
+
+Run [rustfmt](https://github.com/rust-lang/rustfmt) to format the code:
 
 ```bash
 cargo fmt
 ```
 
+### Documentation
+
 Generate documentation in HTML format:
 
 ```bash

src/kdbush.rs

@@ -596,4 +596,44 @@ mod tests {
 
         assert_eq!(result, 5);
     }
+
+    #[test]
+    fn test_select_basic() {
+        let mut kdbush = KDBush::new(10, 1);
+        kdbush.coords = vec![2.0, 3.0, 1.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0];
+        kdbush.ids = vec![0, 1, 2, 3, 4];
+        kdbush.select(2, 0, 4, 0);
+
+        assert_eq!(kdbush.coords[4], 5.0);
+    }
+
+    #[test]
+    fn test_select_large_range() {
+        let mut kdbush = KDBush::new(10, 1);
+        kdbush.coords = (0..4000).map(|x| x as f64).collect();
+        kdbush.ids = (0..4000).collect();
+        kdbush.select(1000, 0, 1999, 0);
+
+        assert_eq!(kdbush.coords[2000], 2000.0);
+    }
+
+    #[test]
+    fn test_select_axis_y() {
+        let mut kdbush = KDBush::new(10, 1);
+        kdbush.coords = vec![2.0, 3.0, 1.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0];
+        kdbush.ids = vec![0, 1, 2, 3, 4];
+        kdbush.select(2, 0, 4, 1);
+
+        assert_eq!(kdbush.coords[4], 5.0);
+    }
+
+    #[test]
+    fn test_select_single_element() {
+        let mut kdbush = KDBush::new(10, 1);
+        kdbush.coords = vec![2.0];
+        kdbush.ids = vec![0];
+        kdbush.select(0, 0, 0, 0);
+
+        assert_eq!(kdbush.coords[0], 2.0);
+    }
 }