feat: Workflow History pruning and prune time settings (#7343)

Github issue / Community forum post (link here to close automatically):

packages/cli/test/unit/workflowHistoryHelper.test.ts

@@ -0,0 +1,55 @@
+import { License } from '@/License';
+import { mockInstance } from '../integration/shared/utils';
+import config from '@/config';
+import { getWorkflowHistoryPruneTime } from '@/workflows/workflowHistory/workflowHistoryHelper.ee';
+
+let licenseMock: License;
+let licensePruneTime = -1;
+
+beforeAll(async () => {
+	licenseMock = mockInstance(License, {
+		getWorkflowHistoryPruneLimit() {
+			return licensePruneTime;
+		},
+	});
+});
+
+beforeEach(() => {
+	licensePruneTime = -1;
+	config.set('workflowHistory.pruneTime', -1);
+});
+
+describe('getWorkflowHistoryPruneTime', () => {
+	test('should return -1 (infinite) if config and license are -1', () => {
+		licensePruneTime = -1;
+		config.set('workflowHistory.pruneTime', -1);
+
+		expect(getWorkflowHistoryPruneTime()).toBe(-1);
+	});
+
+	test('should return config time if license is infinite and config is not', () => {
+		licensePruneTime = -1;
+		config.set('workflowHistory.pruneTime', 24);
+
+		expect(getWorkflowHistoryPruneTime()).toBe(24);
+	});
+
+	test('should return license time if config is infinite and license is not', () => {
+		licensePruneTime = 25;
+		config.set('workflowHistory.pruneTime', -1);
+
+		expect(getWorkflowHistoryPruneTime()).toBe(25);
+	});
+
+	test('should return lowest of config and license time if both are not -1', () => {
+		licensePruneTime = 26;
+		config.set('workflowHistory.pruneTime', 100);
+
+		expect(getWorkflowHistoryPruneTime()).toBe(26);
+
+		licensePruneTime = 100;
+		config.set('workflowHistory.pruneTime', 27);
+
+		expect(getWorkflowHistoryPruneTime()).toBe(27);
+	});
+});