chore: update tests

Cargo.toml

@@ -5,6 +5,7 @@ authors = ["frytg"]
 edition = "2021"
 
 [dependencies]
+regex = "1.11.1"
 reqwest = { version = "0.11", features = ["blocking", "json"] }
 scraper = "0.17"
 

README.md

@@ -20,7 +20,7 @@ This compiles and runs the program directly (using dev profile and debug symbols
 
 To modify the color scheme used, you can provide `-c SCHEME`. For example, `cargo run -- output.svg -u frytg -c halloween` uses GitHub's halloween colors.
 
-Use `cargo fmt` to format the code.
+Use `cargo fmt` to format the code and `cargo test` to run the tests.
 
 ## Usage with binary
 

src/lib.rs

@@ -89,3 +89,6 @@ pub fn fetch_github_stats(
 
     Ok(stats)
 }
+
+#[cfg(test)]
+mod tests;

src/tests.rs

@@ -0,0 +1,65 @@
+#[cfg(test)]
+mod tests {
+    use crate::{Chart, COLOR_SCHEMES};
+
+    fn sample_stats() -> Vec<(String, i32)> {
+        vec![
+            ("2024-01-01".to_string(), 0),
+            ("2024-01-02".to_string(), 1),
+            ("2024-01-03".to_string(), 4),
+            ("2024-01-04".to_string(), 7),
+            ("2024-01-05".to_string(), 10),
+        ]
+    }
+
+    #[test]
+    fn test_chart_creation() {
+        let stats = sample_stats();
+        let chart = Chart::new(stats.clone(), None);
+        assert_eq!(chart.stats, stats);
+        assert_eq!(chart.colors.len(), 5);
+    }
+
+    #[test]
+    fn test_chart_with_custom_colors() {
+        let stats = sample_stats();
+        let colors = Some(COLOR_SCHEMES[2].1.to_vec()); // Halloween scheme
+        let chart = Chart::new(stats, colors.clone());
+        assert_eq!(chart.colors, colors.unwrap());
+    }
+
+    #[test]
+    fn test_svg_rendering() {
+        let stats = sample_stats();
+        let chart = Chart::new(stats, None);
+        let svg = chart.render().unwrap();
+
+        // Basic SVG structure
+        assert!(svg.starts_with("<svg"));
+        assert!(svg.ends_with("</svg>"));
+
+        // Check for required elements
+        assert!(svg.contains("<rect")); // Contribution squares
+        assert!(svg.contains("Mon")); // Weekday labels
+        assert!(svg.contains("Jan")); // Month label
+
+        // Check color usage
+        assert!(svg.contains("#eeeeee")); // Default color scheme
+        assert!(svg.contains("#c6e48b"));
+    }
+
+    #[test]
+    fn test_color_schemes() {
+        // Test default scheme
+        assert_eq!(COLOR_SCHEMES[0].0, "default");
+        assert_eq!(COLOR_SCHEMES[0].1.len(), 5);
+
+        // Test old scheme
+        assert_eq!(COLOR_SCHEMES[1].0, "old");
+        assert_eq!(COLOR_SCHEMES[1].1.len(), 5);
+
+        // Test halloween scheme
+        assert_eq!(COLOR_SCHEMES[2].0, "halloween");
+        assert_eq!(COLOR_SCHEMES[2].1.len(), 5);
+    }
+}

tests/integration_tests.rs

@@ -0,0 +1,31 @@
+use regex::Regex;
+
+use githubchart::{fetch_github_stats, Chart, COLOR_SCHEMES};
+
+#[test]
+fn test_github_stats_fetching() {
+    // Note: This test requires internet connection
+    match fetch_github_stats("frytg") {
+        Ok(stats) => {
+            assert!(!stats.is_empty());
+            // Check date format
+            assert!(Regex::new(r"^\d{4}-\d{2}-\d{2}$")
+                .unwrap()
+                .is_match(&stats[0].0));
+            // Check contribution count is non-negative
+            assert!(stats[0].1 >= 0);
+        }
+        Err(e) => panic!("Failed to fetch stats: {}", e),
+    }
+}
+
+#[test]
+fn test_full_chart_generation() {
+    let stats = vec![("2024-01-01".to_string(), 0), ("2024-01-02".to_string(), 5)];
+    let chart = Chart::new(stats, Some(COLOR_SCHEMES[0].1.to_vec()));
+    let svg = chart.render().expect("Failed to render chart");
+
+    assert!(svg.contains("svg"));
+    assert!(svg.contains("rect"));
+    assert!(svg.contains("Jan")); // Month label
+}