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160 lines (137 loc) · 4.39 KB
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import { describe, expect, it } from "vitest";
import {
createDiffCoverageState,
getDiffCoverageBreakdown,
parseDiffTocEntries,
recordDiffReadFromToolUse,
} from "./diffCoverage.ts";
const diffPath = "/tmp/pr-1.diff";
const toc = `## Files (2)
- src/a.ts → lines 5-10
- yarn.lock → lines 12-20
---
`;
describe("diff coverage line checker", () => {
it("treats Read offsets as zero based", () => {
const state = createDiffCoverageState({
diffPath,
totalLines: 30,
toc,
});
const tracked = recordDiffReadFromToolUse({
state,
toolName: "Read",
input: {
filePath: diffPath,
offset: 0,
limit: 3,
},
cwd: "/",
});
expect(tracked).toBe(true);
const breakdown = getDiffCoverageBreakdown({ state });
expect(breakdown.coveredRanges).toEqual([{ startLine: 1, endLine: 3 }]);
});
it("treats ReadFile offsets as one based", () => {
const state = createDiffCoverageState({
diffPath,
totalLines: 30,
toc,
});
const tracked = recordDiffReadFromToolUse({
state,
toolName: "ReadFile",
input: {
path: diffPath,
offset: 1,
limit: 2,
},
cwd: "/",
});
expect(tracked).toBe(true);
const breakdown = getDiffCoverageBreakdown({ state });
expect(breakdown.coveredRanges).toEqual([{ startLine: 1, endLine: 2 }]);
});
it("supports negative offsets from file end", () => {
const state = createDiffCoverageState({
diffPath,
totalLines: 30,
toc,
});
const tracked = recordDiffReadFromToolUse({
state,
toolName: "Read",
input: {
path: diffPath,
offset: -2,
limit: 2,
},
cwd: "/",
});
expect(tracked).toBe(true);
const breakdown = getDiffCoverageBreakdown({ state });
expect(breakdown.coveredRanges).toEqual([{ startLine: 29, endLine: 30 }]);
});
it("parses TOC lines that include the ` · diff-<sha256>` anchor emitted by checkout_pr", () => {
const productionToc = `## Files (2)
- src/format.ts → lines 9-32 · diff-41c7b3ac268a3a1ae5c7be92f1230f600013b7170e44a693570ccbdb183ea36b
- test/math.test.ts → lines 81-93 · diff-44b3f515a5c787743d239052db11d740d691e8bef711c2427bb2b9752a4103a9
---
`;
const entries = parseDiffTocEntries({ toc: productionToc });
expect(entries).toEqual([
{ filename: "src/format.ts", startLine: 9, endLine: 32 },
{ filename: "test/math.test.ts", startLine: 81, endLine: 93 },
]);
});
it("carries forward coveragePreflightRan from a previous state across checkout refreshes", () => {
const previous = createDiffCoverageState({ diffPath, totalLines: 30, toc });
previous.coveragePreflightRan = true;
previous.coveredRanges = [{ startLine: 5, endLine: 10 }];
const next = createDiffCoverageState({ diffPath, totalLines: 50, toc, previous });
expect(next.coveragePreflightRan).toBe(true);
// coveredRanges are tied to the previous diff content and must not leak forward
expect(next.coveredRanges).toEqual([]);
expect(next.totalLines).toBe(50);
});
it("defaults coveragePreflightRan to false when no previous state is provided", () => {
const state = createDiffCoverageState({ diffPath, totalLines: 30, toc });
expect(state.coveragePreflightRan).toBe(false);
});
it("computes per-file unread ranges from tracked reads", () => {
const state = createDiffCoverageState({
diffPath,
totalLines: 30,
toc,
});
recordDiffReadFromToolUse({
state,
toolName: "Read",
input: {
path: diffPath,
start_line: 5,
end_line: 6,
},
cwd: "/",
});
recordDiffReadFromToolUse({
state,
toolName: "Read",
input: {
path: diffPath,
start_line: 12,
end_line: 14,
},
cwd: "/",
});
const breakdown = getDiffCoverageBreakdown({ state });
const firstFile = breakdown.files[0];
const secondFile = breakdown.files[1];
expect(firstFile.filename).toBe("src/a.ts");
expect(firstFile.coveredRanges).toEqual([{ startLine: 5, endLine: 6 }]);
expect(firstFile.unreadRanges).toEqual([{ startLine: 7, endLine: 10 }]);
expect(secondFile.filename).toBe("yarn.lock");
expect(secondFile.coveredRanges).toEqual([{ startLine: 12, endLine: 14 }]);
expect(secondFile.unreadRanges).toEqual([{ startLine: 15, endLine: 20 }]);
});
});