From 1db77b0527b17e4d733af25a6b2fcfe9e846050a Mon Sep 17 00:00:00 2001
From: Cristian Dominguez <cdominguez@salesforce.com>
Date: Mon, 16 Dec 2024 12:00:19 -0300
Subject: [PATCH] fix(bulk): fallback `columnDelimtier` to `COMMA`

---
 src/bulkUtils.ts                      |  3 ++-
 test/bulkUtils.test.ts                |  1 +
 test/test-files/csv/single-column.csv | 11 +++++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 test/test-files/csv/single-column.csv

diff --git a/src/bulkUtils.ts b/src/bulkUtils.ts
index ebc49825..d18d2201 100644
--- a/src/bulkUtils.ts
+++ b/src/bulkUtils.ts
@@ -243,7 +243,8 @@ export async function detectDelimiter(filePath: string): Promise<ColumnDelimiter
     }
   }
 
-  const columDelimiter = delimiterMap.get(detectedDelimiter ?? '');
+  // default to `COMMA` if no delimiter was found in the CSV file (1 column)
+  const columDelimiter = delimiterMap.get(detectedDelimiter ?? ',');
 
   if (columDelimiter === undefined) {
     throw new SfError(`Failed to detect column delimiter used in ${filePath}.`);
diff --git a/test/bulkUtils.test.ts b/test/bulkUtils.test.ts
index c2ce5018..63d550e1 100644
--- a/test/bulkUtils.test.ts
+++ b/test/bulkUtils.test.ts
@@ -15,6 +15,7 @@ describe('bulkUtils', () => {
       expect(await detectDelimiter('./test/test-files/csv/backquote.csv')).to.equal('BACKQUOTE');
       expect(await detectDelimiter('./test/test-files/csv/caret.csv')).to.equal('CARET');
       expect(await detectDelimiter('./test/test-files/csv/comma.csv')).to.equal('COMMA');
+      expect(await detectDelimiter('./test/test-files/csv/single-column.csv')).to.equal('COMMA');
       expect(await detectDelimiter('./test/test-files/csv/comma_wrapped_values.csv')).to.equal('COMMA');
       expect(await detectDelimiter('./test/test-files/csv/pipe.csv')).to.equal('PIPE');
       expect(await detectDelimiter('./test/test-files/csv/semicolon.csv')).to.equal('SEMICOLON');
diff --git a/test/test-files/csv/single-column.csv b/test/test-files/csv/single-column.csv
new file mode 100644
index 00000000..aa70f2ab
--- /dev/null
+++ b/test/test-files/csv/single-column.csv
@@ -0,0 +1,11 @@
+NAME
+account Upsert #0
+account Upsert #1
+account Upsert #2
+account Upsert #3
+account Upsert #4
+account Upsert #5
+account Upsert #6
+account Upsert #7
+account Upsert #8
+account Upsert #9