e5d48ee238
When no case match we should not just execute the statements of the default case but also of any cases below the default case.
110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
describe("basic switch tests", () => {
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test("string case does not match number target", () => {
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switch (1 + 2) {
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case "3":
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expect().fail();
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case 3:
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return;
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case 5:
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case 1:
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break;
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default:
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break;
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}
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expect().fail();
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});
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test("string concatenation in target", () => {
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var a = "foo";
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switch (a + "bar") {
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case 1:
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expect().fail();
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case "foobar":
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case 2:
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return;
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}
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expect().fail();
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});
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test("default", () => {
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switch (100) {
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default:
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return;
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}
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expect().fail();
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});
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test("return from switch statement", () => {
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function foo(value) {
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switch (value) {
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case 42:
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return "return from 'case 42'";
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default:
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return "return from 'default'";
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}
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}
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expect(foo(42)).toBe("return from 'case 42'");
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expect(foo(43)).toBe("return from 'default'");
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});
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test("continue from switch statement", () => {
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let i = 0;
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for (; i < 5; ++i) {
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switch (i) {
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case 0:
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continue;
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expect().fail();
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case 0:
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expect().fail();
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default:
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continue;
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expect().fail();
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}
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expect().fail();
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}
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expect(i).toBe(5);
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});
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test("default branch is not taken if more exact branch exists", () => {
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function switchTest(i) {
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let result = 0;
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switch (i) {
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case 1:
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result += 1;
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break;
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case 1:
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expect().fail();
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case 2:
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result += 2;
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default:
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result += 4;
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case 3:
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result += 8;
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break;
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case 2:
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expect().fail();
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}
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return result;
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}
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expect(switchTest(1)).toBe(1);
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expect(switchTest(2)).toBe(14);
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expect(switchTest(3)).toBe(8);
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expect(switchTest(4)).toBe(12);
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});
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});
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describe("errors", () => {
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test("syntax errors", () => {
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expect("switch () {}").not.toEval();
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expect("switch () { case 1: continue; }").not.toEval();
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expect("switch () { case 1: break doesnotexist; }").not.toEval();
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expect("label: switch () { case 1: break not_the_right_label; }").not.toEval();
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expect("label: switch () { case 1: continue label; }").not.toEval();
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expect("switch (foo) { bar }").not.toEval();
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expect("switch (foo) { default: default: }").not.toEval();
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});
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});
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