Rust learning: lessons, notes, and exercise crates

tasks/tests/mine.rs

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+use std::fs;
+
+use tasks::error::TaskError;
+use tasks::store::Store;
+use tasks::task::Status;
+
+use crate::common::{temp_path, three_tasks};
+
+mod common;
+
+#[test]
+fn completing_task_that_are_done_is_not_an_error() -> Result<(), TaskError> {
+    let mut m = three_tasks();
+
+    m.complete(1)?;
+
+    let t = m.find(1).unwrap();
+    assert_eq!(t.status, Status::Done);
+
+    Ok(())
+}
+
+#[test]
+fn reload_saved_working() -> Result<(), TaskError> {
+    let mut m = three_tasks();
+    let p = temp_path();
+    m.remove_completed();
+    m.save(&p)?;
+
+    let m2 = Store::load(&p)?;
+    assert_eq!(m2, m);
+    Ok(())
+}
+
+#[test]
+fn smaller_store_smaller_saved_files() -> Result<(), TaskError> {
+    let mut m = three_tasks();
+    let p = temp_path();
+    m.save(&p)?;
+
+    m.remove_completed();
+    m.save(&p)?;
+
+    let s = fs::read_to_string(p)?;
+    assert_eq!(s.lines().count(), 2);
+    Ok(())
+}