Improve error handling38-unwrap-on-empty-choice

Create choose::Error and choose::Result
Improve error propogation
Improve error printing

Add tests for negative indices
Add get_negative_start_end tests
Fixup negative choice indexing

Remove most uses of unwrap

Fixes #38

4 files changed, 59 insertions, 0 deletions

diff --git a/test/alphabet.txt b/test/alphabet.txt
new file mode 100644
index 0000000..83f9439
--- /dev/null
+++ b/test/alphabet.txt
@@ -0,0 +1,19 @@
+a
+b c
+d e f
+
+g h i
+j k
+l
+
+m
+n o
+p q r
+
+s t u
+v w
+x
+
+y
+
+z
diff --git a/test/choose_-1.txt b/test/choose_-1.txt
new file mode 100644
index 0000000..638c41d
--- /dev/null
+++ b/test/choose_-1.txt
@@ -0,0 +1,19 @@
+a
+c
+f
+
+i
+k
+l
+
+m
+o
+r
+
+u
+w
+x
+
+y
+
+z
diff --git a/test/choose_-2.txt b/test/choose_-2.txt
new file mode 100644
index 0000000..b724d82
--- /dev/null
+++ b/test/choose_-2.txt
@@ -0,0 +1,19 @@
+
+b
+e
+
+h
+j
+
+
+
+n
+q
+
+t
+v
+
+
+
+
+
diff --git a/test/e2e_test.sh b/test/e2e_test.sh
index 218a5d4..18e9628 100755
--- a/test/e2e_test.sh
+++ b/test/e2e_test.sh
@@ -19,6 +19,8 @@ diff -w <(cargo run -- 1 3 -o % -i ${test_dir}/lorem.txt 2>/dev/null) <(cat "${t
 diff -w <(cargo run -- 1 3 -o '' -i ${test_dir}/lorem.txt 2>/dev/null) <(cat "${test_dir}/choose_1_3of.txt")
 diff -w <(cargo run -- 3:6 -c -i ${test_dir}/lorem.txt 2>/dev/null) <(cat "${test_dir}/choose_0_3_c.txt")
 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")
 # add tests for different delimiters
 # add tests using piping