UPDATE: Adds 'user model' API (#27)

* bump version for documentation
* Fixes wrong doc comment
* renames old APIs to be consistent

base/src/test/user_model/test_evaluation.rs

@@ -0,0 +1,31 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::UserModel;
+
+#[test]
+fn model_evaluates_automatically() {
+    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
+    model.set_user_input(0, 1, 1, "=1 + 1").unwrap();
+
+    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("2".to_string()));
+    assert_eq!(model.get_cell_content(0, 1, 1), Ok("=1+1".to_string()));
+}
+
+#[test]
+fn pause_resume_evaluation() {
+    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
+    model.pause_evaluation();
+    model.set_user_input(0, 1, 1, "=1+1").unwrap();
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 1),
+        Ok("#ERROR!".to_string())
+    );
+    model.evaluate();
+
+    assert_eq!(model.get_formatted_cell_value(0, 1, 1), Ok("2".to_string()));
+    assert_eq!(model.get_cell_content(0, 1, 1), Ok("=1+1".to_string()));
+
+    model.resume_evaluation();
+    model.set_user_input(0, 2, 1, "=1+4").unwrap();
+    assert_eq!(model.get_formatted_cell_value(0, 2, 1), Ok("5".to_string()));
+}