feat: add some trigger tests

src/trigger.ts

@@ -0,0 +1,17 @@
+const triggerRegex = /\((.*?)\)/g
+
+export function getTriggerText(line: string, cursorPos: number): [string, number, number] | null {
+    triggerRegex.lastIndex = 0  // resetting global regex
+    
+    let match = null
+    while ((match = triggerRegex.exec(line)) !== null) {
+        const cursorInMatch = cursorPos > match.index && cursorPos <= match.index + match[1].length + 1
+
+        if (cursorInMatch) {
+            return [match[1], match.index+1, match.index + match[1].length + 1]
+        }
+
+    }
+    return null
+
+}