LibJS: Add tests for bitwise & and ^

And fix some edge case conversion bugs found by the tests.

Libraries/LibJS/Tests/operators/binary-bitwise-and.js

@@ -0,0 +1,60 @@
+test("basic numeric and", () => {
+    expect(0 & 0).toBe(0);
+    expect(0 & 1).toBe(0);
+    expect(0 & 2).toBe(0);
+    expect(0 & 3).toBe(0);
+    expect(0 & 4).toBe(0);
+    expect(0 & 5).toBe(0);
+
+    expect(1 & 0).toBe(0);
+    expect(1 & 1).toBe(1);
+    expect(1 & 2).toBe(0);
+    expect(1 & 3).toBe(1);
+    expect(1 & 4).toBe(0);
+    expect(1 & 5).toBe(1);
+
+    expect(2 & 0).toBe(0);
+    expect(2 & 1).toBe(0);
+    expect(2 & 2).toBe(2);
+    expect(2 & 3).toBe(2);
+    expect(2 & 4).toBe(0);
+    expect(2 & 5).toBe(0);
+
+    expect(3 & 0).toBe(0);
+    expect(3 & 1).toBe(1);
+    expect(3 & 2).toBe(2);
+    expect(3 & 3).toBe(3);
+    expect(3 & 4).toBe(0);
+    expect(3 & 5).toBe(1);
+
+    expect(4 & 0).toBe(0);
+    expect(4 & 1).toBe(0);
+    expect(4 & 2).toBe(0);
+    expect(4 & 3).toBe(0);
+    expect(4 & 4).toBe(4);
+    expect(4 & 5).toBe(4);
+
+    expect(5 & 0).toBe(0);
+    expect(5 & 1).toBe(1);
+    expect(5 & 2).toBe(0);
+    expect(5 & 3).toBe(1);
+    expect(5 & 4).toBe(4);
+    expect(5 & 5).toBe(5);
+});
+
+test("and with non-numeric values", () => {
+    let x = 3;
+    let y = 7;
+
+    expect("42" & 6).toBe(2);
+    expect(x & y).toBe(3);
+    expect(x & [[[[13]]]]).toBe(1);
+    expect(undefined & y).toBe(0);
+    expect("a" & "b").toBe(0);
+    expect(null & null).toBe(0);
+    expect(undefined & undefined).toBe(0);
+    expect(NaN & NaN).toBe(0);
+    expect(NaN & 6).toBe(0);
+    expect(Infinity & Infinity).toBe(0);
+    expect(-Infinity & Infinity).toBe(0);
+});