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The patch builder works in patch-line-index space, which the patch explorer can supply directly from its parsed-patch state. The focused main view can't: it only knows a selection as diff-line metadata identities (file line number + deletion?), and those indices differ between the raw diff and however a pager renders it. Add the conversion at the boundary so the main view stays in identity space: PatchLineIndicesForLines maps identities to indices (for toggling) and IncludedLineIdentities reports the included change lines as identities (for the inclusion gutter to match rendered rows against). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
53 lines
1.8 KiB
Go
53 lines
1.8 KiB
Go
package patch
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import (
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"testing"
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"github.com/sirupsen/logrus"
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"github.com/stretchr/testify/assert"
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)
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// newTestPatchBuilder returns a PatchBuilder whose files all resolve to the given
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// diff, started for a dummy commit.
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func newTestPatchBuilder(diff string) *PatchBuilder {
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pb := NewPatchBuilder(logrus.New().WithField("test", "test"),
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func(from, to string, reverse bool, filename string, previousPath string, plain bool) (string, error) {
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return diff, nil
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})
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pb.Start("from", "to", false, true)
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return pb
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}
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// In simpleDiff the deletion "-orange" is patch line index 6 (old-file line 2) and the
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// addition "+grape" is index 7 (new-file line 2).
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func TestPatchLineIndicesForLines(t *testing.T) {
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pb := newTestPatchBuilder(simpleDiff)
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indices, err := pb.PatchLineIndicesForLines("filename", []LineIdentity{
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{LineNumber: 2, IsDeletion: true}, // -orange
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{LineNumber: 2, IsDeletion: false}, // +grape
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{LineNumber: 1, IsDeletion: false}, // " apple" — a context line, no change index
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})
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assert.NoError(t, err)
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assert.Equal(t, []int{6, 7}, indices, "context-line identity is skipped; change lines map to their indices")
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}
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func TestIncludedLineIdentities(t *testing.T) {
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pb := newTestPatchBuilder(simpleDiff)
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// Nothing included yet.
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assert.Empty(t, pb.IncludedLineIdentities("filename"))
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// Include only the deletion: it comes back as its identity, the addition does not.
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assert.NoError(t, pb.AddFileLineRange("filename", "", []int{6}))
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assert.Equal(t,
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[]LineIdentity{{LineNumber: 2, IsDeletion: true}},
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pb.IncludedLineIdentities("filename"))
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// Including the addition too yields both identities (order-independent).
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assert.NoError(t, pb.AddFileLineRange("filename", "", []int{7}))
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assert.ElementsMatch(t,
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[]LineIdentity{{LineNumber: 2, IsDeletion: true}, {LineNumber: 2, IsDeletion: false}},
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pb.IncludedLineIdentities("filename"))
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}
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