snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/server/lib/ldap/operations/substring.spec.ts

@@ -0,0 +1,48 @@
+import { expect } from 'chai';
+import 'mocha';
+
+import type { LDAPVariableSubString } from './substring';
+import { executeSubstring } from './substring';
+
+describe('executeSubstring function', () => {
+	it('should throw an error if the start is missing', () => {
+		const operation: LDAPVariableSubString = { operation: 'substring' } as unknown as LDAPVariableSubString;
+		expect(() => executeSubstring('input', operation)).to.throw('Invalid SUBSTRING operation.');
+	});
+
+	it('should throw an error if the start is invalid', () => {
+		const operation: LDAPVariableSubString = { operation: 'substring', start: 0, end: null } as unknown as LDAPVariableSubString;
+		expect(() => executeSubstring('input', operation)).to.throw('Invalid SUBSTRING operation.');
+	});
+
+	it('should get the substring of the input, using the start param', () => {
+		const result = executeSubstring('hello world', { operation: 'substring', start: 6 });
+		expect(result).to.be.equal('world');
+	});
+
+	it('should get the whole string when the start is zero', () => {
+		const result = executeSubstring('hello world', { operation: 'substring', start: 0 });
+		expect(result).to.be.equal('hello world');
+	});
+
+	it('should get the substring of the input, using the start and end param', () => {
+		const result = executeSubstring('hello world', { operation: 'substring', start: 6, end: 8 });
+		expect(result).to.be.equal('wo');
+	});
+
+	it('should work backwards if end is smaller than start', () => {
+		const result = executeSubstring('hello world', { operation: 'substring', start: 5, end: 0 });
+		expect(result).to.be.equal('hello');
+	});
+
+	it('should get an empty string if start and end are the same', () => {
+		expect(executeSubstring('hello world', { operation: 'substring', start: 0, end: 0 })).to.be.equal('');
+		expect(executeSubstring('hello world', { operation: 'substring', start: 5, end: 5 })).to.be.equal('');
+	});
+
+	it('should treat negative values as zero', () => {
+		expect(executeSubstring('hello world', { operation: 'substring', start: -4, end: 5 })).to.be.equal('hello');
+		expect(executeSubstring('hello world', { operation: 'substring', start: 5, end: -4 })).to.be.equal('hello');
+		expect(executeSubstring('hello world', { operation: 'substring', start: -5, end: -4 })).to.be.equal('');
+	});
+});