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import { describe, expect, it } from "vitest";
import { isLastProvider, unloadBlockReason } from "./last-provider";
import { node } from "./test-fixtures";
describe("isLastProvider", () => {
it("is true for a loaded provider when it is the only one", () => {
const nodes = [node({ id: "opencode", tier: "providers" })];
expect(isLastProvider("opencode", nodes)).toBe(true);
});
it("is false for a loaded provider when another provider is loaded", () => {
const nodes = [
node({ id: "opencode", tier: "providers" }),
node({ id: "kimi", tier: "providers" }),
];
expect(isLastProvider("opencode", nodes)).toBe(false);
});
it("is false for a non-provider target (even when alone)", () => {
const nodes = [node({ id: "solo", tier: "standard" })];
expect(isLastProvider("solo", nodes)).toBe(false);
});
it("is false for an UNLOADED provider", () => {
const nodes = [node({ id: "opencode", tier: "providers", loaded: false })];
expect(isLastProvider("opencode", nodes)).toBe(false);
});
it("is false for an unknown id", () => {
expect(isLastProvider("ghost", [])).toBe(false);
});
it("is false for a core-only list (no providers at all)", () => {
const nodes = [node({ id: "kernel", tier: "core", locked: true })];
expect(isLastProvider("kernel", nodes)).toBe(false);
});
});
describe("unloadBlockReason", () => {
it("explains the core lock", () => {
const nodes = [node({ id: "kernel", tier: "core", locked: true })];
const reason = unloadBlockReason("kernel", nodes);
expect(reason).toContain("Core plugins cannot be unloaded");
});
it("explains the last-provider lock", () => {
const nodes = [node({ id: "opencode", tier: "providers" })];
const reason = unloadBlockReason("opencode", nodes);
expect(reason).toContain("last provider");
});
it("is null for an interactive row", () => {
const nodes = [
node({ id: "opencode", tier: "providers" }),
node({ id: "kimi", tier: "providers" }),
node({ id: "app" }),
];
expect(unloadBlockReason("app", nodes)).toBeNull();
expect(unloadBlockReason("opencode", nodes)).toBeNull();
});
it("prefers the core lock when both would apply", () => {
const nodes = [node({ id: "kernel", tier: "core", locked: true })];
expect(unloadBlockReason("kernel", nodes)).toContain("Core");
});
it("is null for an unknown id", () => {
expect(unloadBlockReason("ghost", [])).toBeNull();
});
});
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