test(cli): split-date and axis naming nothing are refused (improvise-tpm8)

tests/headless_cli.rs

@@ -666,6 +666,40 @@ fn a_headless_date_import_splits_when_told_to() {
     assert!(doc.contains("2024-01-15"), "the raw dates stay: {doc}");
 }
 
+/// improvise-8jk6.3 review: a `--split-date` that names nothing splittable
+/// said nothing and exited 0.
+#[test]
+fn split_date_naming_an_unknown_or_non_date_field_is_refused() {
+    let scratch = Scratch::new("split_date_unknown");
+    for field in ["Nope", "Revenue"] {
+        let out_path = scratch.path("out.improv");
+        let out = run_import(
+            &dated_csv(&scratch),
+            &out_path,
+            &["--extract", "Date:Month", "--split-date", field],
+        );
+        assert!(!out.status.success(), "{field}: {}", stderr_of(&out));
+        let err = stderr_of(&out);
+        assert!(err.contains("--split-date") && err.contains(field), "{err}");
+    }
+}
+
+/// improvise-8jk6.3 review: `--axis Date_Month:column` names a category the
+/// hierarchical import no longer builds, and was dropped without a word.
+#[test]
+fn an_axis_naming_a_category_the_import_did_not_build_is_refused() {
+    let scratch = Scratch::new("axis_unknown");
+    let out_path = scratch.path("out.improv");
+    let out = run_import(
+        &dated_csv(&scratch),
+        &out_path,
+        &["--extract", "Date:Month", "--axis", "Date_Month:column"],
+    );
+    assert!(!out.status.success(), "{}", stderr_of(&out));
+    let err = stderr_of(&out);
+    assert!(err.contains("Date_Month") && err.contains("--split-date"), "{err}");
+}
+
 /// code-maat's reports: three schemas, a stray note, and room for the output.
 fn code_maat_folder(scratch: &Scratch) -> PathBuf {
     let dir = scratch.path("maat");