initial commit

test/csv.spec.ts

@@ -0,0 +1,81 @@
+import { describe, it, expect } from "bun:test";
+import { CsvParser, FileChunkSource } from "../src/index.ts";
+
+describe("CsvParser - string input", () => {
+  it("parses simple CSV with headers to objects", async () => {
+    const parser = new CsvParser();
+    const csv = "name,age\nAlice,30\nBob,40";
+    const result = await parser.parseFromString(csv, { hasHeader: true, output: "object" });
+
+    expect(result.headers).toEqual(["name", "age"]);
+    expect(result.rows).toEqual([
+      { name: "Alice", age: "30" },
+      { name: "Bob", age: "40" },
+    ]);
+  });
+
+  it("handles quoted fields with commas and escaped quotes", async () => {
+    const parser = new CsvParser();
+    const csv = [
+      '"name","note"',
+      '"Alice","He said ""hello"", world"',
+      '"Bob","x,y,z"',
+    ].join("\n");
+
+    const result = await parser.parseFromString(csv, { hasHeader: true, output: "object" });
+    expect(result.rows).toEqual([
+      { name: "Alice", note: 'He said "hello", world' },
+      { name: "Bob", note: "x,y,z" },
+    ]);
+  });
+
+  it("supports CRLF line endings", async () => {
+    const parser = new CsvParser();
+    const csv = "a,b\r\n1,2\r\n3,4";
+    const result = await parser.parseFromString(csv, { hasHeader: true });
+    expect(result.headers).toEqual(["a", "b"]);
+    expect(result.rows).toEqual([
+      ["1", "2"],
+      ["3", "4"],
+    ]);
+  });
+
+  it("skips empty lines by default", async () => {
+    const parser = new CsvParser();
+    const csv = "a,b\n\n1,2\n\n";
+    const result = await parser.parseFromString(csv, { hasHeader: true });
+    expect(result.rows).toEqual([["1", "2"]]);
+  });
+
+  it("normalizes row length when validateRowLength is true (default)", async () => {
+    const parser = new CsvParser();
+    const csv = "a,b,c\n1,2\n3,4,5";
+    const result = await parser.parseFromString(csv, { hasHeader: true });
+    expect(result.rows).toEqual([
+      ["1", "2", ""],
+      ["3", "4", "5"],
+    ]);
+  });
+});
+
+describe("CsvParser - file input", () => {
+  it("parses a CSV file via FileChunkSource", async () => {
+    const parser = new CsvParser();
+    const content = "city,temp\nBerlin,12\nMunich,10";
+    const tmpPath = `${process.cwd()}/test.__tmp.csv`;
+    await Bun.write(tmpPath, content);
+    try {
+      const source = new FileChunkSource(tmpPath);
+      const result = await parser.parseFromSource(source, { hasHeader: true, output: "object" });
+      expect(result.rows).toEqual([
+        { city: "Berlin", temp: "12" },
+        { city: "Munich", temp: "10" },
+      ]);
+    } finally {
+      // best-effort cleanup
+      try { await Bun.write(tmpPath, ""); } catch {}
+    }
+  });
+});
+
+