Fix positive start, negative end, length 1 choice is empty

src/choice/mod.rs

@@ -140,6 +140,8 @@ impl Choice {
                     handle.write_choice(*word, config, true)?;
                 }
                 handle.write_choice(vec[end], config, false)?;
+            } else if start == end && self.start < vec.len().try_into()? {
+                handle.write_choice(vec[start], config, false)?;
             }
         }
 

src/choice/test/get_negative_start_end.rs

@@ -131,6 +131,16 @@ fn positive_negative_some() {
     );
 }
 
+#[test]
+fn positive_negative_same() {
+    let config = Config::from_iter(vec!["choose", "1:-3"]);
+    let slice = &[0, 1, 2, 3];
+    assert_eq!(
+        Some((1, 1)),
+        config.opt.choices[0].get_negative_start_end(slice).unwrap()
+    );
+}
+
 #[test]
 fn error_when_choice_is_isize_min() {
     let isize_min = format!("{}", isize::MIN);

src/choice/test/print_choice.rs

@@ -1000,3 +1000,33 @@ fn print_after_to_after_empty() {
 fn print_negative_end_to_negative_end_empty() {
     test_fn(vec!["choose", "-1:-1"], "", "");
 }
+
+#[test]
+fn print_positive_to_following_negative() {
+    test_fn(vec!["choose", "1:-3"], "a b c d e", "b c");
+}
+
+#[test]
+fn print_positive_to_same_as_negative() {
+    test_fn(vec!["choose", "1:-4"], "a b c d e", "b");
+}
+
+#[test]
+fn print_positive_to_preceding_negative() {
+    test_fn(vec!["choose", "1:-5"], "a b c d e", "");
+}
+
+#[test]
+fn print_end_to_last_negative_is_last() {
+    test_fn(vec!["choose", "4:-1"], "a b c d e", "e");
+}
+
+#[test]
+fn print_after_end_to_last_negative_is_empty() {
+    test_fn(vec!["choose", "5:-1"], "a b c d e", "");
+}
+
+#[test]
+fn print_after_end_to_second_to_last_negative_is_empty() {
+    test_fn(vec!["choose", "5:-2"], "a b c d e", "");
+}

test/choose_1x-1.txt

@@ -0,0 +1,19 @@
+
+c
+e f
+
+h i
+k
+
+
+
+o
+q r
+
+t u
+w
+
+
+
+
+

test/choose_1x-2.txt

@@ -0,0 +1,19 @@
+
+
+e
+
+h
+
+
+
+
+
+q
+
+t
+
+
+
+
+
+

test/choose_1x-3.txt

@@ -0,0 +1,19 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

test/e2e_test.sh

@@ -21,6 +21,9 @@ diff -w <(cargo run -- 3:6 -c -i ${test_dir}/lorem.txt 2>/dev/null) <(cat "${tes
 diff -w <(cargo run -- 2 -x -i ${test_dir}/lorem.txt 2>/dev/null) <(cat "${test_dir}/choose_2_x.txt")
 diff -w <(cargo run -- -1 -i ${test_dir}/alphabet.txt 2>/dev/null) <(cat "${test_dir}/choose_-1.txt")
 diff -w <(cargo run -- -2 -i ${test_dir}/alphabet.txt 2>/dev/null) <(cat "${test_dir}/choose_-2.txt")
+diff -w <(cargo run -- 1:-1 -i ${test_dir}/alphabet.txt 2>/dev/null) <(cat "${test_dir}/choose_1x-1.txt")
+diff -w <(cargo run -- 1:-2 -i ${test_dir}/alphabet.txt 2>/dev/null) <(cat "${test_dir}/choose_1x-2.txt")
+diff -w <(cargo run -- 1:-3 -i ${test_dir}/alphabet.txt 2>/dev/null) <(cat "${test_dir}/choose_1x-3.txt")
 # add tests for different delimiters
 # add tests using piping