more tests

navigator/src/functions/assignObjectRecursive.test.js

@@ -1,6 +1,6 @@
 import assignObjectRecursive from "./assignObjectRecursive";
 
-const defaultSource = {
+const source = {
 	str1: 'value1',
 	str2: 'value2',
 	num1: 1,
@@ -14,22 +14,103 @@ const defaultSource = {
 		num2: 2,
 		bool1: true,
 		bool2: false,
+		obj1: {
+			str1: 'value1',
+			str2: 'value2',
+			num1: 1,
+			num2: 2,
+			bool1: true,
+			bool2: false,
+		}
 	}
 };
 
-test('basic assignment with no defaults', () => {
-	const settings = {};
-	assignObjectRecursive(settings, defaultSource);
-	expect(settings).toEqual(defaultSource);
-});
+describe('The assignObjectRecursive function', () => {
+	it('can assign a source object to a target object', () => {
+		const target = {};
+		assignObjectRecursive(target, source);
+		expect(target).toEqual(source);
+	});
 
-test('ensure defaults do not overwrite source', () => {
-	const source = {
-		key1: 'value1',
-		key2: 'value2',
-		obj1: {
-			key1: 'value1',
-			key2: 'value2',
+	it('won\'t overwrite source props with defaults', () => {
+		const defaults = {
+			str1: 'value3',
+			str2: 'value4',
+			num1: 3,
+			num2: 4,
+			bool1: false,
+			bool2: true,
+			obj1: {
+				str1: 'value3',
+				str2: 'value4',
+				num1: 3,
+				num2: 4,
+				bool1: false,
+				bool2: true,
+				obj1: {
+					str1: 'value3',
+					str2: 'value4',
+					num1: 3,
+					num2: 4,
+					bool1: false,
+					bool2: true,
+				}
+			}
+		};
+		const target = {};
+		assignObjectRecursive(target, source, defaults);
+		expect(target).toEqual(source);
+	});
+
+	it('can fill in missing defaults', () => {
+		const defaults = {
+			newStr: "test",
+			newNum: 5,
+			newBool: true,
+			obj1: {
+				newStr: "test",
+				newNum: 5,
+				newBool: true,
+				obj1: {
+					newStr: "test",
+					newNum: 5,
+					newBool: true,
+				}
+			}
 		}
-	};
+		const target = {};
+		assignObjectRecursive(target, source, defaults);
+		expect(target).toEqual({
+			...defaults,
+			...source,
+			obj1: {
+				...defaults.obj1,
+				...source.obj1,
+				obj1: {
+					...defaults.obj1.obj1,
+					...source.obj1.obj1
+				}
+			}
+		}
+		);
+	});
+
+	it('can add deeply nested defaults', () => {
+		const defaults = {
+			lvl1: {
+				lvl2: {
+					lvl3: {
+						lvl4: {
+							key: 'value',
+						}
+					}
+				}
+			}
+		}
+		const target = {};
+		assignObjectRecursive(target, source, defaults);
+		expect(target).toEqual({ ...source, ...defaults });
+		expect(target.lvl1.lvl2.lvl3.lvl4.key).toBe(defaults.lvl1.lvl2.lvl3.lvl4.key);
+	});
+
 });