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import { describe, expect, it } from "vitest";
import { type Diagnostic, DiagnosticsStore } from "./diagnostics.js";
describe("diagnostics", () => {
it("formats diagnostics with severity, location, and message", () => {
const store = new DiagnosticsStore();
store.setPushDiagnostics({
uri: "file:///test.ts",
diagnostics: [
{
range: { start: { line: 0, character: 5 }, end: { line: 0, character: 10 } },
severity: 1,
source: "typescript",
message: "Cannot find name 'hello'.",
},
],
});
const formatted = store.format("file:///test.ts");
expect(formatted).toContain("ERROR");
expect(formatted).toContain("L1:6");
expect(formatted).toContain("Cannot find name 'hello'.");
expect(formatted).toContain("[typescript]");
});
it("merges push and pull diagnostics with deduplication", () => {
const store = new DiagnosticsStore();
const diag = {
range: { start: { line: 0, character: 0 }, end: { line: 0, character: 5 } },
severity: 1,
message: "Error",
};
store.setPushDiagnostics({
uri: "file:///test.ts",
diagnostics: [diag],
});
store.setPullDiagnostics("file:///test.ts", {
kind: "full",
items: [diag],
});
const merged = store.getMerged("file:///test.ts");
expect(merged).toHaveLength(1);
});
it("returns empty string when no diagnostics exist", () => {
const store = new DiagnosticsStore();
expect(store.format("file:///nonexistent.ts")).toBe("");
});
it("purge drops push diagnostics, pull diagnostics, and the received flag (Bug 3)", () => {
const store = new DiagnosticsStore();
store.setPushDiagnostics({
uri: "file:///project/a.ts",
diagnostics: [
{
range: { start: { line: 0, character: 0 }, end: { line: 0, character: 1 } },
severity: 1,
message: "boom",
},
],
});
store.setPullDiagnostics("file:///project/a.ts", {
kind: "full",
items: [
{
range: { start: { line: 1, character: 0 }, end: { line: 1, character: 1 } },
severity: 2,
message: "warn",
},
],
});
expect(store.hasReceivedPush("file:///project/a.ts")).toBe(true);
expect(store.format("file:///project/a.ts")).toContain("boom");
store.purge("file:///project/a.ts");
// Everything for that URI is gone — the store no longer retains it.
expect(store.hasReceivedPush("file:///project/a.ts")).toBe(false);
expect(store.format("file:///project/a.ts")).toBe("");
expect(store.getMerged("file:///project/a.ts")).toHaveLength(0);
// Other URIs are untouched.
expect(store.format("file:///project/b.ts")).toBe("");
});
it("bounds pushDiagnostics — oldest background file is evicted past the cap (Bug 3 remainder)", () => {
// Language servers scan the workspace and push diagnostics for files the
// agent never opened. These never enter the client's openDocuments LRU,
// so without an independent cap the pushDiagnostics map grows forever.
const store = new DiagnosticsStore();
const CAP = 100;
const diag = (uri: string): readonly Diagnostic[] => [
{
range: { start: { line: 0, character: 0 }, end: { line: 0, character: 1 } },
severity: 1,
message: `err in ${uri}`,
},
];
// Push `CAP` distinct background files (at the cap — none evicted yet).
for (let i = 0; i < CAP; i++) {
store.setPushDiagnostics({ uri: `file:///bg/file${i}.ts`, diagnostics: diag(`file${i}`) });
}
expect(store.hasReceivedPush("file:///bg/file0.ts")).toBe(true);
expect(store.format("file:///bg/file0.ts")).toContain("err in file0");
// One past the cap → the least-recently-pushed (file0) is evicted.
store.setPushDiagnostics({
uri: "file:///bg/file100.ts",
diagnostics: diag("file100"),
});
// file0 (oldest) is gone — no didClose, no retained diagnostics, no flag.
expect(store.hasReceivedPush("file:///bg/file0.ts")).toBe(false);
expect(store.format("file:///bg/file0.ts")).toBe("");
expect(store.getMerged("file:///bg/file0.ts")).toHaveLength(0);
// The newest (file100) and a middle entry are retained.
expect(store.hasReceivedPush("file:///bg/file100.ts")).toBe(true);
expect(store.format("file:///bg/file100.ts")).toContain("err in file100");
expect(store.format("file:///bg/file50.ts")).toContain("err in file50");
});
it("re-pushing a URI refreshes its LRU position so it is not evicted", () => {
const store = new DiagnosticsStore();
const CAP = 100;
const diag = (uri: string): readonly Diagnostic[] => [
{
range: { start: { line: 0, character: 0 }, end: { line: 0, character: 1 } },
severity: 1,
message: uri,
},
];
for (let i = 0; i < CAP; i++) {
store.setPushDiagnostics({ uri: `file:///bg/file${i}.ts`, diagnostics: diag(`file${i}`) });
}
// Re-push file0 (an actively-edited file gets re-pushed on each change):
// this should move it to the tail (most-recently-used), NOT leave it at
// the head where it would be the first eviction candidate.
store.setPushDiagnostics({ uri: "file:///bg/file0.ts", diagnostics: diag("file0-updated") });
// Now push one past the cap. file1 (now the oldest untouched) should be
// evicted; file0 (refreshed) must survive.
store.setPushDiagnostics({ uri: "file:///bg/file100.ts", diagnostics: diag("file100") });
expect(store.hasReceivedPush("file:///bg/file0.ts")).toBe(true);
expect(store.format("file:///bg/file0.ts")).toContain("file0-updated");
expect(store.hasReceivedPush("file:///bg/file1.ts")).toBe(false);
expect(store.format("file:///bg/file1.ts")).toBe("");
});
});
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