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| author | Jeremy Daer <jeremydaer@gmail.com> | 2016-12-09 11:34:35 -0700 |
|---|---|---|
| committer | Jeremy Daer <jeremydaer@gmail.com> | 2018-02-18 00:14:51 -0800 |
| commit | 4940cc49ddb361d584d51bc3eb4675ff8ece4a2b (patch) | |
| tree | ef8c912363d354b379eb56bc8b2bd1bb7cea83dc /activesupport/test/core_ext/string_ext_test.rb | |
| parent | 8454aeeb2b8e7d1255acbaaec4e0ae3c97d55f49 (diff) | |
| download | rails-4940cc49ddb361d584d51bc3eb4675ff8ece4a2b.tar.gz rails-4940cc49ddb361d584d51bc3eb4675ff8ece4a2b.tar.bz2 rails-4940cc49ddb361d584d51bc3eb4675ff8ece4a2b.zip | |
String#truncate_bytes: limit to N bytes without breaking multibyte chars
This faithfully preserves grapheme clusters (characters composed of other
characters and combining marks) and other multibyte characters.
Diffstat (limited to 'activesupport/test/core_ext/string_ext_test.rb')
| -rw-r--r-- | activesupport/test/core_ext/string_ext_test.rb | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb index b95d2d8307..ccaa5dc786 100644 --- a/activesupport/test/core_ext/string_ext_test.rb +++ b/activesupport/test/core_ext/string_ext_test.rb @@ -285,6 +285,68 @@ class StringInflectionsTest < ActiveSupport::TestCase assert_equal "Hello Big[...]", "Hello Big World!".truncate(15, omission: "[...]", separator: /\s/) end + def test_truncate_bytes + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16) + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: nil) + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: " ") + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: "🖖") + + assert_equal "👍👍👍…", "👍👍👍👍".truncate_bytes(15) + assert_equal "👍👍👍", "👍👍👍👍".truncate_bytes(15, omission: nil) + assert_equal "👍👍👍 ", "👍👍👍👍".truncate_bytes(15, omission: " ") + assert_equal "👍👍🖖", "👍👍👍👍".truncate_bytes(15, omission: "🖖") + + assert_equal "…", "👍👍👍👍".truncate_bytes(5) + assert_equal "👍", "👍👍👍👍".truncate_bytes(5, omission: nil) + assert_equal "👍 ", "👍👍👍👍".truncate_bytes(5, omission: " ") + assert_equal "🖖", "👍👍👍👍".truncate_bytes(5, omission: "🖖") + + assert_equal "…", "👍👍👍👍".truncate_bytes(4) + assert_equal "👍", "👍👍👍👍".truncate_bytes(4, omission: nil) + assert_equal " ", "👍👍👍👍".truncate_bytes(4, omission: " ") + assert_equal "🖖", "👍👍👍👍".truncate_bytes(4, omission: "🖖") + + assert_raise ArgumentError do + "👍👍👍👍".truncate_bytes(3, omission: "🖖") + end + end + + def test_truncate_bytes_preserves_codepoints + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16) + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: nil) + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: " ") + assert_equal "👍👍👍👍", "👍👍👍👍".truncate_bytes(16, omission: "🖖") + + assert_equal "👍👍👍…", "👍👍👍👍".truncate_bytes(15) + assert_equal "👍👍👍", "👍👍👍👍".truncate_bytes(15, omission: nil) + assert_equal "👍👍👍 ", "👍👍👍👍".truncate_bytes(15, omission: " ") + assert_equal "👍👍🖖", "👍👍👍👍".truncate_bytes(15, omission: "🖖") + + assert_equal "…", "👍👍👍👍".truncate_bytes(5) + assert_equal "👍", "👍👍👍👍".truncate_bytes(5, omission: nil) + assert_equal "👍 ", "👍👍👍👍".truncate_bytes(5, omission: " ") + assert_equal "🖖", "👍👍👍👍".truncate_bytes(5, omission: "🖖") + + assert_equal "…", "👍👍👍👍".truncate_bytes(4) + assert_equal "👍", "👍👍👍👍".truncate_bytes(4, omission: nil) + assert_equal " ", "👍👍👍👍".truncate_bytes(4, omission: " ") + assert_equal "🖖", "👍👍👍👍".truncate_bytes(4, omission: "🖖") + + assert_raise ArgumentError do + "👍👍👍👍".truncate_bytes(3, omission: "🖖") + end + end + + def test_truncates_bytes_preserves_grapheme_clusters + assert_equal "a ", "a ❤️ b".truncate_bytes(2, omission: nil) + assert_equal "a ", "a ❤️ b".truncate_bytes(3, omission: nil) + assert_equal "a ", "a ❤️ b".truncate_bytes(7, omission: nil) + assert_equal "a ❤️", "a ❤️ b".truncate_bytes(8, omission: nil) + + assert_equal "a ", "a 👩❤️👩".truncate_bytes(13, omission: nil) + assert_equal "", "👩❤️👩".truncate_bytes(13, omission: nil) + end + def test_truncate_words assert_equal "Hello Big World!", "Hello Big World!".truncate_words(3) assert_equal "Hello Big...", "Hello Big World!".truncate_words(2) |