utils/rangeDiff.test.ts
Rama main · réplica de lectura del repositorio original.
import { describe, expect, it } from "vitest";
import { postProcessRangeDiff } from "./rangeDiff.ts";
describe("postProcessRangeDiff", () => {
it("returns null for identical patches", () => {
const input = "1: abc1234 = 1: def5678 x";
expect(postProcessRangeDiff(input)).toBeNull();
});
it("returns null for empty input", () => {
expect(postProcessRangeDiff("")).toBeNull();
expect(postProcessRangeDiff(" ")).toBeNull();
});
it("returns null when no changes exist between versions", () => {
const input = [
"1: abc1234 ! 1: def5678 x",
" ## src/file.ts ##",
" @@ src/file.ts",
" +const a = 1;",
" +const b = 2;",
].join("\n");
expect(postProcessRangeDiff(input)).toBeNull();
});
it("strips inner diff prefix from content lines", () => {
const input = [
"1: abc1234 ! 1: def5678 x",
" ## src/math.ts ##",
" @@ src/math.ts",
" + const a = 1;",
" -+ const b = 2;",
" ++ const b = 3;",
" + const c = 4;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/math.ts ##
@@ src/math.ts
const a = 1;
- const b = 2;
+ const b = 3;
const c = 4;"
`);
});
it("handles context lines (inner space prefix)", () => {
const input = [
"1: abc1234 ! 1: def5678 x",
" ## src/file.ts ##",
" @@ src/file.ts",
" const base = true;",
" - const old = true;",
" + const new_ = true;",
" const end = true;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/file.ts ##
@@ src/file.ts
const base = true;
-const old = true;
+const new_ = true;
const end = true;"
`);
});
it("trims context lines around changes", () => {
const contextBefore = Array.from(
{ length: 9 },
(_, i) => ` +const line${i + 1} = ${i + 1};`
);
const contextAfter = Array.from(
{ length: 6 },
(_, i) => ` +const line${i + 11} = ${i + 11};`
);
const input = [
"1: abc1234 ! 1: def5678 x",
" ## src/large.ts ##",
" @@ src/large.ts",
...contextBefore,
" -+const line10 = 10;",
" ++const line10 = 100;",
...contextAfter,
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/large.ts ##
@@ src/large.ts
...
const line7 = 7;
const line8 = 8;
const line9 = 9;
-const line10 = 10;
+const line10 = 100;
const line11 = 11;
const line12 = 12;
const line13 = 13;"
`);
});
it("handles multiple files", () => {
const input = [
"1: abc ! 1: def x",
" ## src/a.ts ##",
" @@ src/a.ts",
" -+old line a",
" ++new line a",
" ## src/b.ts ##",
" @@ src/b.ts",
" +unchanged",
" -+old line b",
" ++new line b",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/a.ts ##
@@ src/a.ts
-old line a
+new line a
## src/b.ts ##
@@ src/b.ts
unchanged
-old line b
+new line b"
`);
});
it("handles new file added in new version", () => {
const input = [
"1: abc ! 1: def x",
" +## src/new.ts (new) ##",
" +@@ src/new.ts (new)",
" ++export const x = 1;",
" ++export const y = 2;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
"+## src/new.ts (new) ##
+@@ src/new.ts (new)
+export const x = 1;
+export const y = 2;"
`);
});
it("handles file removed in new version", () => {
const input = [
"1: abc ! 1: def x",
" -## src/old.ts ##",
" -@@ src/old.ts",
" --export const x = 1;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
"-## src/old.ts ##
-@@ src/old.ts
-export const x = 1;"
`);
});
it("filters out metadata section via context trimming", () => {
const input = [
"1: abc ! 1: def x",
" @@ Metadata",
" Author: Test <test@test.com>",
" ## Commit message ##",
" x",
" ## src/file.ts ##",
" @@ src/file.ts",
" +const a = 1;",
" -+const b = 2;",
" ++const b = 3;",
" +const c = 4;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/file.ts ##
@@ src/file.ts
const a = 1;
-const b = 2;
+const b = 3;
const c = 4;"
`);
});
it("uses custom context line count", () => {
const contextBefore = Array.from(
{ length: 5 },
(_, i) => ` +const line${i + 1} = ${i + 1};`
);
const contextAfter = Array.from(
{ length: 5 },
(_, i) => ` +const line${i + 7} = ${i + 7};`
);
const input = [
"1: abc1234 ! 1: def5678 x",
" ## src/file.ts ##",
" @@ src/file.ts",
...contextBefore,
" -+const changed = old;",
" ++const changed = new;",
...contextAfter,
].join("\n");
expect(postProcessRangeDiff(input, 1)).toMatchInlineSnapshot(`
" ## src/file.ts ##
@@ src/file.ts
...
const line5 = 5;
-const changed = old;
+const changed = new;
const line7 = 7;"
`);
});
it("handles two separate change regions in the same file", () => {
const middle = Array.from({ length: 10 }, (_, i) => ` +const mid${i + 1} = ${i + 1};`);
const input = [
"1: abc ! 1: def x",
" ## src/file.ts ##",
" @@ src/file.ts",
" -+const first = old;",
" ++const first = new;",
...middle,
" -+const second = old;",
" ++const second = new;",
].join("\n");
expect(postProcessRangeDiff(input)).toMatchInlineSnapshot(`
" ## src/file.ts ##
@@ src/file.ts
-const first = old;
+const first = new;
const mid1 = 1;
const mid2 = 2;
const mid3 = 3;
...
const mid8 = 8;
const mid9 = 9;
const mid10 = 10;
-const second = old;
+const second = new;"
`);
});
});