Add more testcases for excerpt() helpersimplify-thin-edge-json-utils

Signed-off-by: Matthias Beyer <matthias.beyer@ifm.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/crates/core/thin_edge_json/src/utils.rs b/crates/core/thin_edge_json/src/utils.rs
index 76fe6fe4..0b7f97ee 100644
--- a/crates/core/thin_edge_json/src/utils.rs
+++ b/crates/core/thin_edge_json/src/utils.rs
@@ -19,3 +19,24 @@ fn excerpt_returns_string_starting_from_line_and_column() {
     );
     assert_eq!("n", excerpt("line 1\nline 2\nline 3\n", 2, 3, 1));
 }
+
+#[test]
+fn excerpt_returns_string_starting_from_line_and_column_but_limits_output() {
+    let expected = "ne 2\nli";
+    let result = excerpt("line 1\nline 2\nline 3\n", 2, 3, 7);
+    assert_eq!(expected, result);
+}
+
+#[test]
+fn excerpt_counts_newline_as_one_char_from_beginning() {
+    let expected = "\n\n\n";
+    let result = excerpt("\n\n\n\n", 1, 1, 3);
+    assert_eq!(expected, result);
+}
+
+#[test]
+fn excerpt_counts_newline_as_one_char_in_between_lines() {
+    let expected = "\n\n";
+    let result = excerpt("\n\n\n\n", 2, 1, 2);
+    assert_eq!(expected, result);
+}