add str.splitlines method

The new splitlines method on str is intended to replace usage of
fs.read('whatever').strip().split('\n').
The problem with the .strip().split() approach is that it doesn't have a
way to represent empty lists (an empty string becomes a list with one
empty string, not an empty list), and it doesn't handle Windows-style
line endings.

1 files changed, 12 insertions, 0 deletions

diff --git a/test cases/common/35 string operations/meson.build b/test cases/common/35 string operations/meson.build
index 116fe0b..27cc0d8 100644
--- a/test cases/common/35 string operations/meson.build
+++ b/test cases/common/35 string operations/meson.build
@@ -125,3 +125,15 @@ assert(mysubstring.substring(10, -25) == '', 'substring is broken')
 assert(mysubstring.substring(-4, 2) == '', 'substring is broken')
 assert(mysubstring.substring(10, 9) == '', 'substring is broken')
 assert(mysubstring.substring(8, 10) == 'z', 'substring is broken')
+
+# str.splitlines()
+assert('foo\nbar\nbaz'.splitlines() == ['foo', 'bar', 'baz'], 'splitlines is broken')
+assert(''.splitlines() == [], 'splitlines with empty string is broken')
+assert('foo\rbar\nbaz\n'.splitlines() == ['foo', 'bar', 'baz'], 'splitlines trailing newline is broken')
+assert('hello\r\nworld'.splitlines() == ['hello', 'world'])
+assert(
+  '  leading ws\nand trailing\t'.splitlines() == ['  leading ws', 'and trailing\t'],
+  'splitlines leading/trailing whitespace is broken',
+)
+assert('\n\r\n\r'.splitlines() == ['', '', ''], 'splitlines is broken')
+assert('foo'.splitlines() == ['foo'], 'splitlines is broken')