forked from sneak/util
clawbot
d52588d635
CollapseWhitespace turns every run of whitespace into a single space and trims the ends, so a block of text becomes one tidy line. Comes with a doc comment and table-driven tests. (closes #7) Model: opus-5
37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
package util
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import "testing"
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// Written as a code point so that it is visible in the source rather than
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// looking like an ordinary space.
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const nonBreakingSpace = string(rune(0x00a0))
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func TestCollapseWhitespace(t *testing.T) {
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tests := []struct {
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name string
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input string
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expected string
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}{
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{"nothing to change", "one two", "one two"},
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{"leading and trailing spaces", " one two ", "one two"},
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{"run in the middle", "one two", "one two"},
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{"tabs and newlines", "one\t\ttwo\nthree", "one two three"},
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{"windows line endings", "one\r\ntwo", "one two"},
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{"non-breaking space", "one" + nonBreakingSpace + "two", "one two"},
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{"mixed whitespace run", "one \t" + nonBreakingSpace + " two", "one two"},
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{"only whitespace", " \t\n ", ""},
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{"empty string", "", ""},
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{"single word with padding", "\tword\n", "word"},
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{"paragraph becomes one line", "first line\n\nsecond line\n", "first line second line"},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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got := CollapseWhitespace(test.input)
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if got != test.expected {
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t.Errorf("expected %q got %q", test.expected, got)
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}
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})
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}
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}
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