Christopher Chedeau
cf45afba61
- This brings in the flow test suite that contains a ton of JavaScript parsing edge cases - This creates snapshot tests using the pretty printer for all of them - If uncomment `RUN_AST_TESTS` line in `tests/run_specs.js`, it checks ast(pretty_print(x)) == ast(x). Right now, "178 failed, 197 passed, 375 of 377 total". So half of the tests are not passing, most of them are crashes and many of the rest are subtle issues.
134 lines
2.2 KiB
JavaScript
134 lines
2.2 KiB
JavaScript
// @flow
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type Mode = "a" | "b" | "c";
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let tests = [
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function(x: string) {
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if (x === 'foo') {
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(x: void); // error
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}
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(x: 'foo'); // error
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},
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function(x: string) {
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if (x !== 'foo') {
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(x: 'foo'); // error
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}
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(x: void); // error
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},
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function(x: 'bar'): 'foo' {
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if (x === 'foo') {
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return x; // unreachable, no error
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}
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return 'foo';
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},
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function(x: 'foo'): string {
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if (x === 'bar') {
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return x;
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}
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return x;
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},
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function(x: 'foo') {
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if (x !== 'bar') {
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(x: 'foo');
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}
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(x: 'foo');
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},
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function(x: 'foo'): string {
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if (x === 'foo') {
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return x;
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}
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return x;
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},
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function(x: 'foo' | 'bar') {
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if (x === 'foo') {
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(x: 'foo');
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(x: void); // error
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}
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if (x === 'bar') {
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(x: 'bar');
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(x: void); // error
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}
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},
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function(x: { foo: string }): 'foo' {
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if (x.foo === 'foo') {
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return x.foo;
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}
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return x.foo; // error
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},
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function(
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x: { kind: 'foo', foo: string } | { kind: 'bar', bar: string }
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): string {
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if (x.kind === 'foo') {
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return x.foo;
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} else {
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return x.bar;
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}
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},
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function(str: string, obj: { foo: string }) {
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if (str === obj.bar) { // ok, typos allowed in conditionals
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}
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},
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function(str: string, obj: {[key: string]: string}) {
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if (str === obj.bar) { // ok
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}
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},
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function(str: string): Mode {
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var ch = str[0];
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if (ch !== "a" && ch !== "b" && ch !== "c") {
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throw new Error("Wrong string passed");
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}
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return ch;
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},
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function(s: string): ?Mode {
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if (s === "a") {
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return s;
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} else if (s === "d") {
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return s; // error
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}
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},
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function(mode: Mode) {
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switch (mode) {
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case "a":
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(mode: "a");
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break;
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case "b":
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case "c":
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(mode: "b" | "c");
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break;
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}
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},
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function(x: string): "" {
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if (x) {
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return x; // error
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} else {
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return x; // no error, inferred to be ""
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}
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},
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// Simple template literals are ok
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function(x: string): 'foo' {
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if (x === `foo`) {
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return x;
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}
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if (`foo` === x) {
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return x;
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}
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return 'foo';
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},
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];
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