Initial commit (by create-cloudflare CLI)

node_modules/printable-characters/test.js

@@ -0,0 +1,77 @@
+"use strict";
+
+const assert              = require ('assert')
+const printableCharacters = require (process.env.PRINTABLE_CHARACTERS_TEST_FILE)
+
+// cannot use spread operator in tests due to Node v4 compatibility requirements...
+const strlen              = printableCharacters.strlen
+    , isBlank             = printableCharacters.isBlank
+    , blank               = printableCharacters.blank
+    , ansiEscapeCodes     = printableCharacters.ansiEscapeCodes
+    , zeroWidthCharacters = printableCharacters.zeroWidthCharacters
+    , partition           = printableCharacters.partition
+    , first               = printableCharacters.first
+
+describe ('printable-characters', () => {
+
+    it ('determines visible length', () => {
+
+        assert.equal (strlen ('💩'), 1)
+        //assert.equal (strlen ('👩‍❤️‍💋‍👩'), 1) // FAILING, see http://blog.jonnew.com/posts/poo-dot-length-equals-two for possible solution
+        assert.equal (strlen ('❤️'), 1)
+        assert.equal (strlen ('foo bar'), 7)
+        assert.equal (strlen ('\u001b[106mfoo bar\u001b[49m'), 7)
+    })
+
+    it ('detects blank text', () => {
+
+        assert (!isBlank ('💩'))
+        assert (!isBlank ('foobar'))
+        assert ( isBlank ('\u001b[106m  \t  \t   \n     \u001b[49m'))
+    })
+
+    it ('matches zero-width characters and ANSI escape codes', () => {
+
+        let s = '\u001b[106m' + 'foo' + '\n\n' + 'bar' + '\u001b[49m'
+
+        assert (s = s.replace (ansiEscapeCodes, ''), 'foo\n\nbar')
+        assert (    s.replace (zeroWidthCharacters, ''), 'foobar')
+    })
+
+    it ('obtains blank string of the same width', () => {
+
+        assert.equal (blank ('💩'), ' ')
+        //assert.equal (blank ('👩‍❤️‍💋‍👩'), ' ') // FAILING, see http://blog.jonnew.com/posts/poo-dot-length-equals-two for possible solution
+        assert.equal (blank ('❤️'), ' ')
+        assert.equal (blank ('foo'), '   ')
+        assert.equal (blank ('\n'), '\n')
+        assert.equal (blank ('\t'), '\t')
+        assert.equal (blank ('\tfoo \nfoo'), '\t    \n   ')
+        assert.equal (blank ('\u001b[22m\u001b[1mfoo \t\u001b[39m\u001b[22m'), '    \t')
+    })
+
+    it ('extracts invisible parts followed by visible ones', () => {
+
+        assert.deepEqual (partition (''),                        [                                                     ])
+        assert.deepEqual (partition ('foo'),                     [['',          'foo']                                 ])
+        assert.deepEqual (partition ('\u001b[1mfoo'),            [['\u001b[1m', 'foo']                                 ])
+        assert.deepEqual (partition ('\u001b[1mfoo\u0000bar'),   [['\u001b[1m', 'foo'],   ['\u0000', 'bar']            ])
+        assert.deepEqual (partition ('\u001b[1mfoo\u0000bar\n'), [['\u001b[1m', 'foo'],   ['\u0000', 'bar'], ['\n', '']])
+    })
+
+    it ('gets first N visible symbols (preserving invisible parts)', () => {
+   
+        assert.equal (first ('💩23456789', 0),   '')
+        assert.equal (first ('💩23456789', 3),   '💩23')
+        assert.equal (first ('💩23456789', 100), '💩23456789')
+
+        const s = '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m'
+        
+        assert.equal (first (s, 0),   '\u001b[22m\u001b[1m' + ''    + '\u0000' + ''   + '\u001b[39m' + ''   + '\n' + ''   + '\u001b[39m\u001b[22m')
+        assert.equal (first (s, 3),   '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + ''   + '\u001b[39m' + ''   + '\n' + ''   + '\u001b[39m\u001b[22m')
+        assert.equal (first (s, 4),   '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '4'  + '\u001b[39m' + ''   + '\n' + ''   + '\u001b[39m\u001b[22m')
+        assert.equal (first (s, 6),   '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '6'  + '\n' + ''   + '\u001b[39m\u001b[22m')
+        assert.equal (first (s, 9),   '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m')
+        assert.equal (first (s, 100), '\u001b[22m\u001b[1m' + '💩23' + '\u0000' + '45' + '\u001b[39m' + '67' + '\n' + '89' + '\u001b[39m\u001b[22m')
+    })
+})