docs: clarify ValidationStrategy object behavior (#415)

Author: Pixel998

packages/object-schema/README.md

@@ -115,8 +115,8 @@ Instead of specifying a `validate()` method, you can specify one of the followin
 - `"array"` - value must be an array.
 - `"boolean"` - value must be a boolean.
 - `"number"` - value must be a number.
-- `"object"` - value must be an object.
-- `"object?"` - value must be an object or null.
+- `"object"` - value must be a non-null object, including arrays and non-plain objects.
+- `"object?"` - value must be an object or null, including arrays and non-plain objects.
 - `"string"` - value must be a string.
 - `"string!"` - value must be a non-empty string.
 

packages/object-schema/tests/validation-strategy.test.js

@@ -75,10 +75,18 @@ describe("ValidationStrategy", () => {
 	});
 
 	describe("object", () => {
-		it("should not throw an error when the value is an object", () => {
+		it("should not throw an error when the value is a plain object", () => {
 			ValidationStrategy.object({});
 		});
 
+		it("should not throw an error when the value is an array", () => {
+			ValidationStrategy.object([]);
+		});
+
+		it("should not throw an error when the value is a non-plain object", () => {
+			ValidationStrategy.object(new Date());
+		});
+
 		it("should throw an error when the value is null", () => {
 			assert.throws(() => {
 				ValidationStrategy.object(null);
@@ -117,10 +125,18 @@ describe("ValidationStrategy", () => {
 	});
 
 	describe("object?", () => {
-		it("should not throw an error when the value is an object", () => {
+		it("should not throw an error when the value is a plain object", () => {
 			ValidationStrategy["object?"]({});
 		});
 
+		it("should not throw an error when the value is an array", () => {
+			ValidationStrategy["object?"]([]);
+		});
+
+		it("should not throw an error when the value is a non-plain object", () => {
+			ValidationStrategy["object?"](new Date());
+		});
+
 		it("should not throw an error when the value is null", () => {
 			ValidationStrategy["object?"](null);
 		});