LibJS: Convert Array tests to new testing framework

Libraries/LibJS/Tests/builtins/Array/array-length-setter.js

@@ -1,51 +1,37 @@
-load("test-common.js");
-
-try {
-    var a = [1, 2, 3];
-
-    assert(a.length === 3);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-
-    a.length = 5;
-    assert(a.length === 5);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-    assert(a[3] === undefined);
-    assert(a[4] === undefined);
-
-    a.length = 1;
-    assert(a.length === 1);
-    assert(a[0] === 1);
-
-    a.length = 0;
-    assert(a.length === 0);
-
-    a.length = "42";
-    assert(a.length === 42);
-
-    a.length = [];
-    assert(a.length === 0);
-
-    a.length = true;
-    assert(a.length === 1);
-
-    [undefined, "foo", -1, Infinity, -Infinity, NaN].forEach(value => {
-        assertThrowsError(
-            () => {
+describe("errors", () => {
+    test("invalid array length value", () => {
+        var a = [1, 2, 3];
+        [undefined, "foo", -1, Infinity, -Infinity, NaN].forEach(value => {
+            expect(() => {
                 a.length = value;
-            },
-            {
-                error: RangeError,
-                message: "Invalid array length",
-            }
-        );
-        assert(a.length === 1);
+            }).toThrowWithMessage(RangeError, "Invalid array length");
+            expect(a).toHaveLength(3);
+        });
+    });
+});
+
+describe("normal behavior", () => {
+    test("extend array by setting length", () => {
+        var a = [1, 2, 3];
+        a.length = 5;
+        expect(a).toEqual([1, 2, 3, undefined, undefined]);
     });
 
-    console.log("PASS");
-} catch (e) {
-    console.log("FAIL: " + e);
-}
+    test("truncate array by setting length", () => {
+        var a = [1, 2, 3];
+        a.length = 2;
+        expect(a).toEqual([1, 2]);
+        a.length = 0;
+        expect(a).toEqual([]);
+    });
+
+    test("length value is coerced to number if possible", () => {
+        var a = [1, 2, 3];
+        a.length = "42";
+        expect(a).toHaveLength(42);
+        a.length = [];
+        expect(a).toHaveLength(0);
+        a.length = true;
+        expect(a).toHaveLength(1);
+    });
+});