diff --git a/tests/js/auto-formatter.test.js b/tests/js/auto-formatter.test.js
new file mode 100644
index 0000000..a4beff4
--- /dev/null
+++ b/tests/js/auto-formatter.test.js
@@ -0,0 +1,90 @@
+import {
+    formatPromptText,
+    __test__
+} from "../../web/js/auto-formatter.js";
+
+const {
+    shouldAutoFormat
+} = __test__;
+
+describe('AutoFormatter Functions', () => {
+
+    describe('shouldAutoFormat', () => {
+        const mockNodeInfo = (nodeType, inputName) => ({
+            nodeType,
+            inputName
+        });
+
+        test('should return false for empty text', () => {
+            expect(shouldAutoFormat('', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+            expect(shouldAutoFormat('   ', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+        });
+
+        test('should return false for blocklisted nodes', () => {
+            expect(shouldAutoFormat('some text,', mockNodeInfo('Power Puter (rgthree)', 'code'))).toBe(false);
+            expect(shouldAutoFormat('some text,', mockNodeInfo('LoraLoaderBlockWeight //Inspire', 'block_vector'))).toBe(false);
+        });
+
+        test('should return false for numeric data or single-letter placeholders', () => {
+            expect(shouldAutoFormat('0,0,0,1,1,1', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+            expect(shouldAutoFormat('0.5, -1.2, 0.8', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+            expect(shouldAutoFormat('A,B,R', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+            expect(shouldAutoFormat('X, 1.5, Y', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+        });
+
+        test('should return true for text with "word + comma" pattern', () => {
+            expect(shouldAutoFormat('1girl, blue hair,', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(true);
+            expect(shouldAutoFormat('tag1, tag2', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(true);
+        });
+
+        test('should return false if "word + comma" pattern is not found', () => {
+            expect(shouldAutoFormat('hello world', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+            expect(shouldAutoFormat('tag1 tag2', mockNodeInfo('CLIPTextEncode', 'text'))).toBe(false);
+        });
+    });
+
+    describe('formatPromptText', () => {
+        test('should format text by adding comma and space after tags', () => {
+            const input = 'tag1,tag2,tag3';
+            const expected = 'tag1, tag2, tag3, ';
+            expect(formatPromptText(input)).toBe(expected);
+        });
+
+        test('should remove extra spaces around tags', () => {
+            const input = '  tag1  ,  tag2  ';
+            const expected = 'tag1, tag2, ';
+            expect(formatPromptText(input)).toBe(expected);
+        });
+
+        test('should preserve special syntax like weights', () => {
+            const input = '(tag1:1.2), [tag2]';
+            // Note: The current implementation splits by comma.
+            // If the input is "(tag1:1.2), [tag2]", it splits into "(tag1:1.2)" and "[tag2]".
+            // Then joins with ", ".
+            const expected = '(tag1:1.2), [tag2], ';
+            expect(formatPromptText(input)).toBe(expected);
+        });
+
+        test('should handle multiple lines', () => {
+            const input = 'tag1, tag2\ntag3, tag4';
+            const expected = 'tag1, tag2, \ntag3, tag4, ';
+            expect(formatPromptText(input)).toBe(expected);
+        });
+
+        test('should keep empty lines unchanged', () => {
+            const input = 'tag1, tag2\n\ntag3, tag4';
+            const expected = 'tag1, tag2, \n\ntag3, tag4, ';
+            expect(formatPromptText(input)).toBe(expected);
+        });
+
+        test('should handle empty input', () => {
+            expect(formatPromptText('')).toBe('');
+            expect(formatPromptText(null)).toBe(null);
+            expect(formatPromptText(undefined)).toBe(undefined);
+        });
+
+        test('should handle input with only spaces', () => {
+            expect(formatPromptText('   ')).toBe('   ');
+        });
+    });
+});