UPDATE: Dump of initial files

base/src/test/test_circular_references.rs

@@ -0,0 +1,27 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn test_simple_circ() {
+    let mut model = new_empty_model();
+    model._set("A1", "=A1+1");
+    model.evaluate();
+    assert_eq!(model._get_text("A1"), "#CIRC!");
+}
+
+#[test]
+fn test_simple_circ_propagate() {
+    let mut model = new_empty_model();
+    model._set("A1", "=B6");
+    model._set("A2", "=A1+1");
+    model._set("A3", "=A2+1");
+    model._set("A4", "=A3+5");
+    model._set("B6", "=A4*7");
+    model.evaluate();
+    assert_eq!(model._get_text("A1"), "#CIRC!");
+    assert_eq!(model._get_text("A2"), "#CIRC!");
+    assert_eq!(model._get_text("A3"), "#CIRC!");
+    assert_eq!(model._get_text("A4"), "#CIRC!");
+    assert_eq!(model._get_text("B6"), "#CIRC!");
+}