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xarmian
7ba823004c
* feat(history): version rows carry their writer, line counts and create marker; a diff endpoint pairs each row with its own change (PLAN-2348 U2) * test(history): server legs, export/import leg; web type and API method for the version diff (PLAN-2348 U2) * docs(history): the version diff endpoint and row fields in CLAUDE.md; FormatDiffSummary names what it counts (PLAN-2348 U2) * fix(history): user_id already existed on item_versions (migration 012); a diff refuses a body the chain could not rebuild (PLAN-2348 U2, codex r1)
28 lines
914 B
Go
28 lines
914 B
Go
package diff
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import "testing"
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func TestLineCounts(t *testing.T) {
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for _, c := range []struct {
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name, old, new string
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added, removed int
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}{
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{"create", "", "a\nb\nc\n", 3, 0},
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{"clear", "a\nb\n", "", 0, 2},
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{"one line edited", "a\nb\nc\n", "a\nB\nc\n", 1, 1},
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{"one character edited is one line, not a chunk count", "alpha beta\n", "alpha Beta\n", 1, 1},
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{"insert in the middle", "a\nc\n", "a\nb\nc\n", 1, 0},
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// The old last line gains a newline, so it is removed and re-added: jsdiff's
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// diffLines tokenises the same way and DiffView renders the same +2 −1.
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{"appending past a last line with no newline", "a\nb", "a\nb\nc", 2, 1},
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{"unchanged", "a\nb\n", "a\nb\n", 0, 0},
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} {
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t.Run(c.name, func(t *testing.T) {
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a, r := LineCounts(c.old, c.new)
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if a != c.added || r != c.removed {
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t.Fatalf("LineCounts = +%d −%d, want +%d −%d", a, r, c.added, c.removed)
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}
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})
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}
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}
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