import { describe, it, expect } from "vitest"
describe("Utility Functions", () => {
describe("BigInt handling", () => {
it("should serialize BigInt values correctly", () => {
// Test the bigIntReplacer function behavior
const testData = {
normal: 123,
bigInt: BigInt(9007199254740992), // Larger than Number.MAX_SAFE_INTEGER - 1
string: "test",
nested: {
bigInt: BigInt(123456789012345678901234567890n),
},
}
// This simulates what happens in the server
const json = JSON.stringify(testData, (_: string, value: unknown): unknown => {
if (typeof value === "bigint") {
return value.toString()
}
return value
})
interface ParsedData {
normal: number
bigInt: string
string: string
nested: {
bigInt: string
}
}
const parsed = JSON.parse(json) as ParsedData
expect(parsed.normal).toBe(123)
expect(parsed.bigInt).toBe("9007199254740992")
expect(parsed.string).toBe("test")
expect(parsed.nested.bigInt).toBe("123456789012345678901234567890")
})
})
describe("Query classification", () => {
it("should correctly identify write queries", () => {
const writeQueries = [
"CREATE (n:Node)",
" CREATE (n:Node)",
"MERGE (n:Node)",
"DELETE n",
"SET n.prop = 1",
"REMOVE n.prop",
"MATCH (n) DELETE n",
"MATCH (n) SET n.prop = 1",
"match (n) delete n", // case insensitive
"MATCH (n) WHERE n.id = 1 DELETE n",
]
const isWriteQuery = (query: string): boolean =>
/^\s*(CREATE|MERGE|DELETE|SET|REMOVE|MATCH.*DELETE|MATCH.*SET)/i.test(query)
for (const query of writeQueries) {
expect(isWriteQuery(query), `Query "${query}" should be identified as write`).toBe(true)
}
})
it("should correctly identify read queries", () => {
const readQueries = [
"MATCH (n) RETURN n",
"MATCH (n:Node) RETURN n.name",
"CALL show_tables() RETURN *",
"RETURN 1",
"WITH 1 as x RETURN x",
"MATCH (n) WHERE n.active = true RETURN n", // Simple WHERE clause
]
const isWriteQuery = (query: string): boolean =>
/^\s*(CREATE|MERGE|DELETE|SET|REMOVE|MATCH.*DELETE|MATCH.*SET)/i.test(query)
for (const query of readQueries) {
expect(isWriteQuery(query), `Query "${query}" should be identified as read`).toBe(false)
}
})
})
describe("Error messages", () => {
it("should format error messages correctly", () => {
const testArgs = { foo: "bar", baz: 123 }
const errorMessage = `Missing required argument: cypher. Received: ${JSON.stringify(testArgs)}`
expect(errorMessage).toContain("Missing required argument: cypher")
expect(errorMessage).toContain('"foo":"bar"')
expect(errorMessage).toContain('"baz":123')
})
})
describe("Path handling", () => {
it("should handle various database path formats", () => {
const paths = [
"./mydb",
"mydb",
"/absolute/path/to/db",
"../relative/db",
"C:\\Windows\\Path\\db", // Windows path
"C:/Windows/Path/db", // Windows with forward slashes
]
// All paths should be valid strings
for (const dbPath of paths) {
expect(typeof dbPath).toBe("string")
expect(dbPath.length).toBeGreaterThan(0)
}
})
})
})
describe("Integration scenarios", () => {
it("should handle concurrent queries gracefully", async () => {
// This tests that our handler structure can handle multiple requests
interface MockRequest {
params: {
name: string
arguments: {
cypher: string
}
}
}
const mockHandler = async (
request: MockRequest,
): Promise<{ content: Array<{ type: string; text: string }>; isError: boolean }> => {
// Simulate async operation
await new Promise((resolve) => setTimeout(resolve, 10))
return {
content: [
{
type: "text",
text: `Processed: ${request.params.arguments.cypher}`,
},
],
isError: false,
}
}
const requests = [
{ params: { name: "query", arguments: { cypher: "MATCH (n) RETURN n LIMIT 1" } } },
{ params: { name: "query", arguments: { cypher: "MATCH (n) RETURN n LIMIT 2" } } },
{ params: { name: "query", arguments: { cypher: "MATCH (n) RETURN n LIMIT 3" } } },
]
const results = await Promise.all(requests.map((req) => mockHandler(req)))
expect(results).toHaveLength(3)
expect(results[0]?.content[0]?.text).toContain("LIMIT 1")
expect(results[1]?.content[0]?.text).toContain("LIMIT 2")
expect(results[2]?.content[0]?.text).toContain("LIMIT 3")
})
it("should handle malformed JSON gracefully", () => {
const malformedInputs = [
undefined,
null,
"",
'{"incomplete": ',
'{"cypher": null}',
'{"cypher": undefined}', // This would be invalid JSON
]
for (const input of malformedInputs.slice(0, -1)) {
// These should be handled without throwing
interface QueryInput {
cypher?: string
query?: string
}
const typedInput = input as QueryInput | undefined
const cypher = typedInput?.cypher || typedInput?.query
expect(cypher).toBeFalsy()
}
})
})
