Source code
Revision control
Copy as Markdown
Other Tools
/// tests cases ported over from python standard library
use textwrap::{dedent, indent};
const ROUNDTRIP_CASES: [&str; 3] = [
// basic test case
"Hi.\nThis is a test.\nTesting.",
// include a blank line
"Hi.\nThis is a test.\n\nTesting.",
// include leading and trailing blank lines
"\nHi.\nThis is a test.\nTesting.\n",
];
const WINDOWS_CASES: [&str; 2] = [
// use windows line endings
"Hi.\r\nThis is a test.\r\nTesting.",
// pathological case
"Hi.\r\nThis is a test.\n\r\nTesting.\r\n\n",
];
#[test]
fn test_indent_nomargin_default() {
// indent should do nothing if 'prefix' is empty.
for text in ROUNDTRIP_CASES.iter() {
assert_eq!(&indent(text, ""), text);
}
for text in WINDOWS_CASES.iter() {
assert_eq!(&indent(text, ""), text);
}
}
#[test]
fn test_roundtrip_spaces() {
// A whitespace prefix should roundtrip with dedent
for text in ROUNDTRIP_CASES.iter() {
assert_eq!(&dedent(&indent(text, " ")), text);
}
}
#[test]
fn test_roundtrip_tabs() {
// A whitespace prefix should roundtrip with dedent
for text in ROUNDTRIP_CASES.iter() {
assert_eq!(&dedent(&indent(text, "\t\t")), text);
}
}
#[test]
fn test_roundtrip_mixed() {
// A whitespace prefix should roundtrip with dedent
for text in ROUNDTRIP_CASES.iter() {
assert_eq!(&dedent(&indent(text, " \t \t ")), text);
}
}
#[test]
fn test_indent_default() {
// Test default indenting of lines that are not whitespace only
let prefix = " ";
let expected = [
// Basic test case
" Hi.\n This is a test.\n Testing.",
// Include a blank line
" Hi.\n This is a test.\n\n Testing.",
// Include leading and trailing blank lines
"\n Hi.\n This is a test.\n Testing.\n",
];
for (text, expect) in ROUNDTRIP_CASES.iter().zip(expected.iter()) {
assert_eq!(&indent(text, prefix), expect)
}
let expected = [
// Use Windows line endings
" Hi.\r\n This is a test.\r\n Testing.",
// Pathological case
" Hi.\r\n This is a test.\n\r\n Testing.\r\n\n",
];
for (text, expect) in WINDOWS_CASES.iter().zip(expected.iter()) {
assert_eq!(&indent(text, prefix), expect)
}
}
#[test]
fn indented_text_should_have_the_same_number_of_lines_as_the_original_text() {
let texts = ["foo\nbar", "foo\nbar\n", "foo\nbar\nbaz"];
for original in texts.iter() {
let indented = indent(original, "");
assert_eq!(&indented, original);
}
}