InMemoryTerm: add tests specifically for InMemoryTerm

src/in_memory.rs

@@ -46,6 +46,10 @@ impl InMemoryTerm {
         rows.reverse();
         rows.join("\n")
     }
+
+    pub fn cursor_position(&self) -> (u16, u16) {
+        self.state.lock().unwrap().parser.screen().cursor_position()
+    }
 }
 
 impl TermLike for InMemoryTerm {
@@ -139,6 +143,70 @@ mod test {
     use super::*;
     use crate::{MultiProgress, ProgressBar, ProgressDrawTarget, ProgressFinish, ProgressStyle};
 
+    #[test]
+    fn line_wrapping() {
+        let in_mem = InMemoryTerm::new(10, 5);
+        assert_eq!(in_mem.cursor_position(), (0, 0));
+
+        in_mem.write_str("ABCDE").unwrap();
+        assert_eq!(in_mem.contents(), "ABCDE");
+        assert_eq!(in_mem.cursor_position(), (0, 5));
+
+        // Should wrap onto next line
+        in_mem.write_str("FG").unwrap();
+        assert_eq!(in_mem.contents(), "ABCDE\nFG");
+        assert_eq!(in_mem.cursor_position(), (1, 2));
+
+        in_mem.write_str("HIJ").unwrap();
+        assert_eq!(in_mem.contents(), "ABCDE\nFGHIJ");
+        assert_eq!(in_mem.cursor_position(), (1, 5));
+    }
+
+    #[test]
+    fn write_line() {
+        let in_mem = InMemoryTerm::new(10, 5);
+        assert_eq!(in_mem.cursor_position(), (0, 0));
+
+        in_mem.write_line("A").unwrap();
+        assert_eq!(in_mem.contents(), "A");
+        assert_eq!(in_mem.cursor_position(), (1, 0));
+
+        in_mem.write_line("B").unwrap();
+        assert_eq!(in_mem.contents(), "A\nB");
+        assert_eq!(in_mem.cursor_position(), (2, 0));
+
+        in_mem.write_line("Longer than cols").unwrap();
+        assert_eq!(in_mem.contents(), "A\nB\nLonge\nr tha\nn col\ns");
+        assert_eq!(in_mem.cursor_position(), (6, 0));
+    }
+
+    #[test]
+    fn basic_functionality() {
+        let in_mem = InMemoryTerm::new(10, 80);
+
+        in_mem.write_line("This is a test line").unwrap();
+        assert_eq!(in_mem.contents(), "This is a test line");
+
+        in_mem.write_line("And another line!").unwrap();
+        assert_eq!(in_mem.contents(), "This is a test line\nAnd another line!");
+
+        in_mem.move_cursor_up(1).unwrap();
+        in_mem.write_str("TEST").unwrap();
+
+        assert_eq!(in_mem.contents(), "This is a test line\nTESTanother line!");
+    }
+
+    #[test]
+    fn newlines() {
+        let in_mem = InMemoryTerm::new(10, 10);
+        in_mem.write_line("LINE ONE").unwrap();
+        in_mem.write_line("LINE TWO").unwrap();
+        in_mem.write_line("").unwrap();
+        in_mem.write_line("LINE FOUR").unwrap();
+
+        assert_eq!(in_mem.contents(), "LINE ONE\nLINE TWO\n\nLINE FOUR");
+    }
+
     #[test]
     fn basic_progress_bar() {
         let in_mem = InMemoryTerm::new(10, 80);