Test Excel-style multiline TSV cells

cmd/dataxl/main_test.go

@@ -67,6 +67,36 @@ func TestTSVToJSONRestoresPaths(t *testing.T) {
 	}
 }
 
+func TestTSVToJSONAcceptsExcelMultilineCells(t *testing.T) {
+	// Excel's clipboard format uses CRLF between records and quotes cells that
+	// contain line breaks. Quotes inside a quoted cell are doubled.
+	input := strings.NewReader("id\tdescription\tnote\r\n" +
+		"1\t\"first line\r\nsecond line\"\t\"She said \"\"hello\"\".\"\r\n" +
+		"2\tsingle line\tplain\r\n")
+	var out bytes.Buffer
+	var errOut bytes.Buffer
+	if err := run([]string{"-from", "tsv", "-to", "json"}, input, &out, &errOut); err != nil {
+		t.Fatalf("run failed: %v\nstderr: %s", err, errOut.String())
+	}
+
+	var records []map[string]any
+	if err := json.Unmarshal(out.Bytes(), &records); err != nil {
+		t.Fatalf("invalid json: %v\n%s", err, out.String())
+	}
+	if len(records) != 2 {
+		t.Fatalf("record count = %d, want 2", len(records))
+	}
+	if got := records[0]["description"]; got != "first line\nsecond line" {
+		t.Fatalf("description = %#v, want multiline cell", got)
+	}
+	if got := records[0]["note"]; got != `She said "hello".` {
+		t.Fatalf("note = %#v, want embedded quotes", got)
+	}
+	if got := records[1]["description"]; got != "single line" {
+		t.Fatalf("second description = %#v, want single line", got)
+	}
+}
+
 func TestJSONToXLSXAndBack(t *testing.T) {
 	dir := t.TempDir()
 	xlsxPath := filepath.Join(dir, "data.xlsx")