X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/2d39b0e377c0896910ee49ae70082ba665faf986..ed1e77d3adeb83d26fd1dfb16dd84cabdcefd250:/tests/stress/string-iterators.js

diff --git a/tests/stress/string-iterators.js b/tests/stress/string-iterators.js
new file mode 100644
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--- /dev/null
+++ b/tests/stress/string-iterators.js
@@ -0,0 +1,212 @@
+// This test checks the behavior of the String iterator
+
+var testString = "Cocoa,Cappuccino";
+var stringIterator = testString[Symbol.iterator]();
+var stringIteratorPrototype = stringIterator.__proto__;
+var stringIteratorPrototypeNext = stringIteratorPrototype.next;
+
+if (stringIterator.hasOwnProperty('next'))
+    throw "next method should exists on %StringIteratorPrototype%";
+if (!stringIteratorPrototype.hasOwnProperty('next'))
+    throw "next method should exists on %StringIteratorPrototype%";
+
+var iterator = testString[Symbol.iterator]();
+var i = 0;
+while (true) {
+    var {done, value} = iterator.next();
+    if (done)
+        break;
+    if (value !== testString[i])
+        throw "Error: bad value: " + value;
+    i++;
+}
+
+if (testString.length !== i)
+    throw "Error: bad value: " + i;
+
+function testSurrogatePair(testString, expected, numberOfElements) {
+    if (testString.length !== numberOfElements)
+        throw "Error: bad value: " + testString.length;
+
+    var iterator = testString[Symbol.iterator]();
+    var i = 0;
+    while (true) {
+        var {done, value} = iterator.next();
+        if (done)
+            break;
+        if (value !== expected[i])
+            throw "Error: bad value: " + value;
+        i++;
+    }
+
+    if (i !== expected.length)
+        throw "Error: bad value: " + i;
+
+    for (var codePoint of testString) {
+        if (value !== expected[i])
+            throw "Error: bad value: " + value;
+    }
+}
+
+// "\uD842\uDFB7\u91ce\u5bb6"
+var testString = "𠮷野家";
+var expected = [
+    String.fromCharCode(0xD842, 0xDFB7),
+    String.fromCharCode(0x91CE),
+    String.fromCharCode(0x5BB6),
+];
+testSurrogatePair(testString, expected, 4);
+
+var testString = "A\uD842";
+var expected = [
+    String.fromCharCode(0x0041),
+    String.fromCharCode(0xD842),
+];
+testSurrogatePair(testString, expected, 2);
+
+var testString = "A\uD842A";
+var expected = [
+    String.fromCharCode(0x0041),
+    String.fromCharCode(0xD842),
+    String.fromCharCode(0x0041),
+];
+testSurrogatePair(testString, expected, 3);
+
+var testString = "A\uD842\uDFB7";
+var expected = [
+    String.fromCharCode(0x0041),
+    String.fromCharCode(0xD842, 0xDFB7),
+];
+testSurrogatePair(testString, expected, 3);
+
+var testString = "\uD842A\uDFB7";
+var expected = [
+    String.fromCharCode(0xD842),
+    String.fromCharCode(0x0041),
+    String.fromCharCode(0xDFB7),
+];
+testSurrogatePair(testString, expected, 3);
+
+var testString = "\uDFB7\uD842A";
+var expected = [
+    String.fromCharCode(0xDFB7),
+    String.fromCharCode(0xD842),
+    String.fromCharCode(0x0041),
+];
+testSurrogatePair(testString, expected, 3);
+
+var string1 = "Cocoa";
+var string1Iterator = string1[Symbol.iterator]();
+var index = 0;
+while (true) {
+    var result = stringIteratorPrototypeNext.call(string1Iterator);
+    var value = result.value;
+    if (result.done) {
+        break;
+    }
+    if (value !== string1[index++])
+        throw "Error: bad value: " + value;
+}
+if (index !== 5)
+    throw "Error: bad index: " + index;
+
+function increment(iter) {
+    return stringIteratorPrototypeNext.call(iter);
+}
+var string1 = "Cocoa";
+var string2 = "Cocoa";
+var string1Iterator = string1[Symbol.iterator]();
+var string2Iterator = string2[Symbol.iterator]();
+for (var i = 0; i < 3; ++i) {
+    var value1 = increment(string1Iterator).value;
+    var value2 = increment(string2Iterator).value;
+    if (value1 !== value2)
+        throw "Error: bad value: " + value1 + " " + value2;
+}
+
+var string1 = "Cappuccino";
+var string1Iterator = string1[Symbol.iterator]();
+
+var value = string1Iterator.next().value;
+if (value !== "C")
+    throw "Error: bad value: " + value;
+var value = string1Iterator.next().value;
+if (value !== "a")
+    throw "Error: bad value: " + value;
+var value = string1Iterator.next().value;
+if (value !== "p")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "p")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "u")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "c")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "c")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "i")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "n")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== "o")
+    throw "Error: bad value: " + value;
+var value = stringIteratorPrototypeNext.call(string1Iterator).value;
+if (value !== undefined)
+    throw "Error: bad value: " + value;
+
+var primitives = [
+    "string",
+    42,
+    0.03,
+    false,
+    true,
+    Symbol("Cocoa"),
+    null,
+    undefined
+];
+for (var primitive of primitives) {
+    var didThrow = null;
+    try {
+        stringIteratorPrototypeNext.call(primitive);
+    } catch (e) {
+        didThrow = e;
+    }
+    if (!didThrow)
+        throw "Error: no error thrown";
+    var message = 'TypeError: %StringIteratorPrototype%.next requires that |this| be a String Iterator instance';
+    if (primitive == null)
+        message = 'TypeError: %StringIteratorPrototype%.next requires that |this| not be null or undefined'
+    if (String(didThrow) !== message)
+        throw "Error: bad error thrown: " + didThrow;
+}
+
+var nonRelatedObjects = [
+    {},
+    [],
+    new Date(),
+    new Error(),
+    Object(Symbol()),
+    new String("Cappuccino"),
+    new Number(42),
+    new Boolean(false),
+    function () { },
+];
+for (var object of nonRelatedObjects) {
+    var didThrow = null;
+    try {
+        stringIteratorPrototypeNext.call(object);
+    } catch (e) {
+        didThrow = e;
+    }
+    if (!didThrow)
+        throw "Error: no error thrown";
+    if (String(didThrow) !== 'TypeError: %StringIteratorPrototype%.next requires that |this| be a String Iterator instance')
+        throw "Error: bad error thrown: " + didThrow;
+}