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... and when recalling a commit message from an old commit by pressing up-arrow. This is necessary because committing turns our soft line breaks into real ones, but when rewording we want to turn them back into soft ones again, so that it's possible to insert words at the beginning of a paragraph and have everything rewrap nicely. This is only a best effort; the algorithm only removes those hard line breaks that can be removed without changing the way the message looks. This works well when the previous commit message was wrapped at the same width, which for most users should be the most common case; but if it wasn't, the result is not great. Specifically, if the old wrap width was smaller, some hard line breaks just won't be removed; if it was wider though, you'll get an unpleasant comb effect with alternating long and short lines. In such a case it's best to switch to the editor and use whatever wrapping features you have there (e.g. alt-Q).
42 lines
899 B
Go
42 lines
899 B
Go
package helpers
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestTryRemoveHardLineBreaks(t *testing.T) {
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scenarios := []struct {
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name string
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message string
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autoWrapWidth int
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expectedResult string
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}{
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{
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name: "empty",
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message: "",
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autoWrapWidth: 7,
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expectedResult: "",
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},
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{
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name: "all line breaks are needed",
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message: "abc\ndef\n\nxyz",
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autoWrapWidth: 7,
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expectedResult: "abc\ndef\n\nxyz",
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},
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{
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name: "some can be unwrapped",
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message: "123\nabc def\nghi jkl\nmno\n456\n",
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autoWrapWidth: 7,
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expectedResult: "123\nabc def ghi jkl mno\n456\n",
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},
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}
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for _, s := range scenarios {
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t.Run(s.name, func(t *testing.T) {
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actualResult := TryRemoveHardLineBreaks(s.message, s.autoWrapWidth)
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assert.Equal(t, s.expectedResult, actualResult)
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})
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}
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}
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