test: add Vitest and Phase 1 pure-helper suite

Introduce automated testing to a project that had no test runner, no
test script and no CI. Vitest fits the existing Vite setup with near-zero
config; a standalone vitest.config.ts wires the @/ alias via
vite-tsconfig-paths and runs in the node environment, avoiding the app's
Tailwind/React/WASM plugins that pure-logic tests do not need.

Cover the cheapest, highest-value surface first: pure helpers with no DOM,
WASM or database. getNextSequence and cloneField (field.ts), the
charset/collation and SQLite integer-column reordering plus enum naming
(render-uttils.ts), and orderTables including the CircularDependencyError
cycle path that backs the Foreign Key Cycle Detection feature.

The build's tsc step is unaffected (plain tsc no-ops on the root config)
and the new files typecheck clean under strict and lint clean.
This commit is contained in:
Alberto Arena
2026-08-05 06:24:18 +02:00
parent fab51f2d13
commit d0cd2d8fa4
7 changed files with 608 additions and 4 deletions
+394 -1
View File
@@ -103,7 +103,8 @@
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}
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@@ -7635,6 +7636,119 @@
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"why-is-node-running": "cli.js"
},
"engines": {
"node": ">=8"
}
},
"node_modules/word-wrap": {
"version": "1.2.5",
"resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
+5 -2
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@@ -7,7 +7,9 @@
"dev": "vite",
"build": "tsc && cross-env NODE_OPTIONS=--max-old-space-size=8192 vite build",
"lint": "eslint -c .eslintrc.json ./src/**/**/*.{ts,tsx} --fix",
"preview": "vite preview"
"preview": "vite preview",
"test": "vitest run",
"test:watch": "vitest"
},
"dependencies": {
"@codemirror/lang-sql": "^6.9.0",
@@ -105,6 +107,7 @@
"typescript": "5.6.3",
"vite": "^5.2.0",
"vite-plugin-top-level-await": "^1.5.0",
"vite-tsconfig-paths": "^4.3.2"
"vite-tsconfig-paths": "^4.3.2",
"vitest": "^2.1.9"
}
}
+60
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@@ -0,0 +1,60 @@
import { describe, it, expect } from "vitest";
import { cloneField, getNextSequence } from "./field";
import { FieldType } from "@/lib/schemas/field-schema";
// Minimal field factory. FieldType is a Drizzle-inferred row type with many
// columns; these helpers only read `sequence` (and copy the rest), so a partial
// cast keeps the fixtures focused on what is under test.
const makeField = (overrides: Partial<FieldType> = {}): FieldType =>
({
id: "f1",
tableId: "t1",
name: "col",
sequence: 0,
...overrides,
}) as FieldType;
describe("getNextSequence", () => {
it("returns 0 for an empty field list", () => {
expect(getNextSequence([])).toBe(0);
});
it("returns max sequence + 1", () => {
const fields = [
makeField({ sequence: 0 }),
makeField({ sequence: 5 }),
makeField({ sequence: 2 }),
];
expect(getNextSequence(fields)).toBe(6);
});
it("handles a single field", () => {
expect(getNextSequence([makeField({ sequence: 4 })])).toBe(5);
});
});
describe("cloneField", () => {
it("assigns a fresh id and preserves other properties", () => {
const original = makeField({
id: "original-id",
name: "email",
sequence: 3,
});
const clone = cloneField(original);
expect(clone.id).not.toBe(original.id);
expect(clone.name).toBe("email");
expect(clone.sequence).toBe(3);
expect(clone.tableId).toBe(original.tableId);
});
it("does not mutate the source field", () => {
const original = makeField({ id: "original-id" });
cloneField(original);
expect(original.id).toBe("original-id");
});
});
+68
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@@ -0,0 +1,68 @@
import { describe, it, expect } from "vitest";
import {
fixCharsetPlacement,
fixSQLiteColumnOrder,
getPostgresEnumName,
} from "./render-uttils";
import { FieldType } from "@/lib/schemas/field-schema";
import { TableType } from "@/lib/schemas/table-schema";
describe("fixCharsetPlacement", () => {
it("moves CHARACTER SET / COLLATE directly after the column type", () => {
const sql = [
"CREATE TABLE users (",
"name VARCHAR(255) NOT NULL CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,",
"email TEXT",
")",
].join("\n");
const out = fixCharsetPlacement(sql);
expect(out).toContain(
"name VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL",
);
// charset/collation must sit before the remaining attributes
const line = out.split("\n").find((l) => l.includes("CHARACTER SET")) ?? "";
expect(line.indexOf("CHARACTER SET")).toBeLessThan(
line.indexOf("NOT NULL"),
);
});
it("leaves columns without charset/collation untouched", () => {
const sql = ["CREATE TABLE t (", "email TEXT", ")"].join("\n");
expect(fixCharsetPlacement(sql)).toContain("email TEXT");
});
});
describe("fixSQLiteColumnOrder", () => {
it("reorders INTEGER PK attributes to PRIMARY KEY / AUTOINCREMENT / NOT NULL", () => {
const sql = [
"CREATE TABLE t (",
"id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT",
")",
].join("\n");
expect(fixSQLiteColumnOrder(sql)).toContain(
"id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL",
);
});
it("leaves non-primary-key INTEGER columns unchanged", () => {
const sql = ["CREATE TABLE t (", "age INTEGER DEFAULT 0", ")"].join("\n");
expect(fixSQLiteColumnOrder(sql)).toContain("age INTEGER DEFAULT 0");
});
});
describe("getPostgresEnumName", () => {
it("builds <table>_<lowercased field>_enum", () => {
const table = { name: "Order" } as TableType;
const field = { name: "Status" } as FieldType;
expect(getPostgresEnumName(table, field)).toBe("Order_status_enum");
});
});
+67
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@@ -0,0 +1,67 @@
import { describe, it, expect } from "vitest";
import { orderTables } from "./tables";
import { SortableTable } from "@/lib/table";
// `relationships` holds the ids of the tables this table depends on (its foreign
// keys / parents), so a valid topological order lists dependencies first.
describe("orderTables", () => {
it("orders a dependency chain parent-first", () => {
const tables: SortableTable[] = [
{ tableId: "C", relationships: ["B"] },
{ tableId: "A", relationships: [] },
{ tableId: "B", relationships: ["A"] },
];
const order = orderTables(tables);
expect(order).toHaveLength(3);
expect(order.indexOf("A")).toBeLessThan(order.indexOf("B"));
expect(order.indexOf("B")).toBeLessThan(order.indexOf("C"));
});
it("places a table after every dependency it references", () => {
const tables: SortableTable[] = [
{ tableId: "orders", relationships: ["users", "products"] },
{ tableId: "users", relationships: [] },
{ tableId: "products", relationships: [] },
];
const order = orderTables(tables);
expect(order.indexOf("users")).toBeLessThan(order.indexOf("orders"));
expect(order.indexOf("products")).toBeLessThan(order.indexOf("orders"));
});
it("throws a CircularDependencyError describing the cycle", () => {
const tables: SortableTable[] = [
{ tableId: "A", relationships: ["B"] },
{ tableId: "B", relationships: ["A"] },
];
let caught: unknown;
try {
orderTables(tables);
} catch (error) {
caught = error;
}
expect(caught).toBeDefined();
const err = caught as {
success: boolean;
message: string;
cycle: string[];
};
expect(err.success).toBe(false);
expect(err.message).toBe("Cycle detected");
expect(Array.isArray(err.cycle)).toBe(true);
// the cycle is reported as a closed loop (first node repeated at the end)
expect(err.cycle[0]).toBe(err.cycle[err.cycle.length - 1]);
expect(err.cycle).toContain("A");
expect(err.cycle).toContain("B");
});
});
+1 -1
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@@ -8,5 +8,5 @@
"strict": true
},
"include": ["vite.config.ts"]
"include": ["vite.config.ts", "vitest.config.ts"]
}
+13
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@@ -0,0 +1,13 @@
import { defineConfig } from "vitest/config";
import tsconfigPaths from "vite-tsconfig-paths";
// Standalone test config: the app's vite.config.ts pulls in Tailwind, React and
// WASM/worker plugins that pure-logic tests do not need. We only need the `@/`
// alias to resolve, which vite-tsconfig-paths provides from tsconfig.json.
export default defineConfig({
plugins: [tsconfigPaths()],
test: {
environment: "node",
include: ["src/**/*.test.ts"],
},
});