first infrastructure for unit-level tests

Makefile

@@ -6,6 +6,8 @@ help:
 	$(info lint                         | run lints with clippy)
 	$(info benchmark                    | just for fun, really)
 	$(info profile                      | only on linux - run callgrind and annotate it)
+	$(info unit-tests                   | run all unit test)
+	$(info continuous-unit-tests        | run all unit test whenever something changes)
 	$(info journey-tests                | run all stateless journey test)
 	$(info continuous-journey-tests     | run all stateless journey test whenever something changes)
 	$(info -- Use docker for all dependencies - run make interactively from there ----------------)
@@ -33,6 +35,12 @@ profile: target/release/dua
 benchmark: target/release/dua
 	hyperfine '$<'
 
+unit-tests:
+	cargo test --test interactive
+
+continuous-unit-tests:
+	watchexec $(MAKE) unit-tests
+
 journey-tests: target/debug/dua
 	./tests/stateless-journey.sh $<
 

src/interactive.rs

@@ -9,7 +9,7 @@ mod app {
     pub struct App {}
 
     impl App {
-        pub fn event_loop<B, R>(
+        pub fn process_events<B, R>(
             &mut self,
             terminal: &mut Terminal<B>,
             keys: Keys<R>,

src/main.rs

@@ -39,7 +39,7 @@ fn run() -> Result<(), Error> {
                     .with_context(|_| "Interactive mode requires a connected terminal")?
             };
             let mut app = dua::interactive::App::initialize(&mut terminal, walk_options, input)?;
-            app.event_loop(&mut terminal, io::stdin().keys())?
+            app.process_events(&mut terminal, io::stdin().keys())?
         }
         Some(Aggregate {
             input,

tests/interactive.rs

@@ -0,0 +1,25 @@
+mod app {
+    use dua::interactive::App;
+    use dua::{ByteFormat, Color, WalkOptions};
+    use failure::Error;
+    use std::path::Path;
+    use tui::backend::TestBackend;
+    use tui::Terminal;
+
+    #[test]
+    fn journey_with_single_path() -> Result<(), Error> {
+        let mut terminal = Terminal::new(TestBackend::new(40, 20))?;
+        let input = Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures/sample-01");
+
+        let app = App::initialize(
+            &mut terminal,
+            WalkOptions {
+                threads: 1,
+                byte_format: ByteFormat::Metric,
+                color: Color::None,
+            },
+            vec![input],
+        )?;
+        Ok(())
+    }
+}