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import { describe, expect, it } from "vitest";
import { parseCSV } from "./csvParser";
describe("parseCSV", () => {
it("parses simple CSV with headers", () => {
const csv = `deck,note_type,Front,Back
English,Basic,hello,world
English,Basic,goodbye,farewell`;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.headers).toEqual([
"deck",
"note_type",
"Front",
"Back",
]);
expect(result.data.rows).toHaveLength(2);
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: "hello",
Back: "world",
});
expect(result.data.rows[1]).toEqual({
deck: "English",
note_type: "Basic",
Front: "goodbye",
Back: "farewell",
});
}
});
it("handles quoted fields with commas", () => {
const csv = `deck,note_type,Front,Back
English,Basic,"hello, world","foo, bar"`;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: "hello, world",
Back: "foo, bar",
});
}
});
it("handles quoted fields with newlines", () => {
const csv = `deck,note_type,Front,Back
English,Basic,"line1
line2","back"`;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows).toHaveLength(1);
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: "line1\nline2",
Back: "back",
});
}
});
it("handles escaped quotes", () => {
const csv = `deck,note_type,Front,Back
English,Basic,"say ""hello""",world`;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: 'say "hello"',
Back: "world",
});
}
});
it("skips empty lines", () => {
const csv = `deck,note_type,Front,Back
English,Basic,hello,world
English,Basic,goodbye,farewell
`;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows).toHaveLength(2);
}
});
it("handles CRLF line endings", () => {
const csv = "deck,note_type,Front,Back\r\nEnglish,Basic,hello,world\r\n";
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows).toHaveLength(1);
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: "hello",
Back: "world",
});
}
});
it("returns error for empty file", () => {
const result = parseCSV("");
expect(result.success).toBe(false);
if (!result.success) {
expect(result.error.message).toBe("CSV file is empty");
}
});
it("returns error for inconsistent column count", () => {
const csv = `deck,note_type,Front,Back
English,Basic,hello`;
const result = parseCSV(csv);
expect(result.success).toBe(false);
if (!result.success) {
expect(result.error.message).toBe("Row 2: Expected 4 columns, got 3");
expect(result.error.line).toBe(2);
}
});
it("trims whitespace from values", () => {
const csv = `deck,note_type,Front,Back
English , Basic , hello , world `;
const result = parseCSV(csv);
expect(result.success).toBe(true);
if (result.success) {
expect(result.data.rows[0]).toEqual({
deck: "English",
note_type: "Basic",
Front: "hello",
Back: "world",
});
}
});
});
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