fix: Parsing for qualifiers with colon characters

src/mutation.ts

@@ -32,7 +32,7 @@ export type Value = string | number | boolean;
 
 export interface ParsedColumn {
   family: string | null;
-  qualifier: string | null;
+  qualifier: string | null | undefined;
 }
 export interface ConvertFromBytesOptions {
   userOptions?: ConvertFromBytesUserOptions;
@@ -380,11 +380,19 @@ export class Mutation {
    * @private
    */
   static parseColumnName(columnName: string): ParsedColumn {
-    const parts = columnName.split(':');
+    const colonIdx = columnName.indexOf(':');
+
+    if (colonIdx === -1) {
+      // columnName does not contain ':'
+      return {
+        family: columnName,
+        qualifier: undefined,
+      };
+    }
 
     return {
-      family: parts[0],
-      qualifier: parts[1],
+      family: columnName.slice(0, colonIdx),
+      qualifier: columnName.slice(colonIdx + 1),
     };
   }
 

test/mutation.ts

@@ -465,6 +465,13 @@ describe('Bigtable/Mutation', () => {
       assert.strictEqual(parsed.family, 'a');
       assert.strictEqual(parsed.qualifier, undefined);
     });
+
+    it('should parse a qualifier name with colons', () => {
+      const parsed = Mutation.parseColumnName('a:b:c');
+
+      assert.strictEqual(parsed.family, 'a');
+      assert.strictEqual(parsed.qualifier, 'b:c');
+    });
   });
 
   describe('toProto', () => {