add more test case

tests/connections/connection.test.ts

@@ -53,7 +53,7 @@ describe('Database Connection', () => {
     });
 
     test('Support positional placeholder', async () => {
-        if (process.env.CONNECTION_TYPE === 'mongo') return;
+        if (process.env.CONNECTION_TYPE === 'mongodb') return;
 
         const sql =
             process.env.CONNECTION_TYPE === 'mysql'

tests/units/placeholder.test.ts

@@ -0,0 +1,73 @@
+import {
+    namedPlaceholder,
+    toNumberedPlaceholders,
+} from './../../src/utils/placeholder';
+
+test('Positional placeholder', () => {
+    expect(
+        namedPlaceholder('SELECT * FROM users WHERE id = :id AND age > :age', {
+            id: 1,
+            age: 50,
+        })
+    ).toEqual({
+        query: 'SELECT * FROM users WHERE id = ? AND age > ?',
+        bindings: [1, 50],
+    });
+});
+
+test('Positional placeholder inside the string should be ignored', () => {
+    expect(
+        namedPlaceholder(
+            'SELECT * FROM users WHERE name = :name AND email = ":email"',
+            {
+                name: 'John',
+            }
+        )
+    ).toEqual({
+        query: 'SELECT * FROM users WHERE name = ? AND email = ":email"',
+        bindings: ['John'],
+    });
+});
+
+test('Named placeholder to number placeholder', () => {
+    expect(
+        namedPlaceholder(
+            'SELECT * FROM users WHERE id = :id AND age > :age',
+            {
+                id: 1,
+                age: 30,
+            },
+            true
+        )
+    ).toEqual({
+        query: 'SELECT * FROM users WHERE id = $1 AND age > $2',
+        bindings: [1, 30],
+    });
+});
+
+test('Named placeholder to number placeholder with string', () => {
+    expect(
+        namedPlaceholder(
+            'SELECT * FROM users WHERE id = :id AND email = ":email"',
+            {
+                id: 1,
+            },
+            true
+        )
+    ).toEqual({
+        query: 'SELECT * FROM users WHERE id = $1 AND email = ":email"',
+        bindings: [1],
+    });
+});
+
+test('Convert positional placeholder to numbered placeholder', () => {
+    expect(
+        toNumberedPlaceholders(
+            `SELECT * FROM users WHERE id = ? AND email = '?' AND name = 'Outer""base' AND age > ?`,
+            [1, 30]
+        )
+    ).toEqual({
+        query: `SELECT * FROM users WHERE id = $1 AND email = '?' AND name = 'Outer""base' AND age > $2`,
+        bindings: [1, 30],
+    });
+});