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159bbb0825
This makes it easier to copy diff hunks and paste them into code. We only strip the prefixes if the copied lines are either all '+' or all '-' (possibly including context lines), otherwise we keep them. We also keep them when parts of a hunk header is included in the selection; this is useful for copying a diff hunk and pasting it into a github comment, for example. A not-quite-correct edge case is when you select the '--- a/file.txt' line of a diff header on its own; in this case we copy it as '-- a/file.txt' (same for the '+++' line). This is probably uncommon enough that it's not worth fixing (it's not trivial to fix because we don't know that we're in a header).
89 lines
1.2 KiB
Go
89 lines
1.2 KiB
Go
package controllers
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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 Test_dropDiffPrefix(t *testing.T) {
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scenarios := []struct {
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name string
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diff string
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expectedResult string
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}{
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{
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name: "empty string",
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diff: "",
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expectedResult: "",
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},
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{
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name: "only added lines",
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diff: `+line1
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+line2
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`,
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expectedResult: `line1
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line2
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`,
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},
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{
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name: "added lines with context",
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diff: ` line1
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+line2
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`,
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expectedResult: `line1
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line2
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`,
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},
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{
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name: "only deleted lines",
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diff: `-line1
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-line2
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`,
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expectedResult: `line1
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line2
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`,
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},
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{
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name: "deleted lines with context",
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diff: `-line1
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line2
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`,
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expectedResult: `line1
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line2
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`,
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},
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{
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name: "only context",
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diff: ` line1
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line2
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`,
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expectedResult: `line1
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line2
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`,
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},
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{
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name: "added and deleted lines",
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diff: `+line1
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-line2
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`,
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expectedResult: `+line1
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-line2
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`,
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},
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{
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name: "hunk header lines",
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diff: `@@ -1,8 +1,11 @@
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line1
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`,
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expectedResult: `@@ -1,8 +1,11 @@
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line1
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`,
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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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assert.Equal(t, s.expectedResult, dropDiffPrefix(s.diff))
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})
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}
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}
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