toLowerCase-toUpperCase.js

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function testToLowerCase() {

    var s1 = "abcdefgABCDEFGH 123456";

    assertEq(isLatin1(s1), true);

    // Latin1

    var s2 = s1.toLowerCase();

    assertEq(isLatin1(s2), true);

    assertEq(s2, "abcdefgabcdefgh 123456");

    s2 = s1.toLocaleLowerCase();

    assertEq(isLatin1(s2), true);

    assertEq(s2, "abcdefgabcdefgh 123456");

    // TwoByte

    s2 = "abcdefg\u1200ABCDEFGH 123456\u04AC".toLowerCase();

    assertEq(s2, "abcdefg\u1200abcdefgh 123456\u04AD");

    s2 = "abcdefg\u1200ABCDEFGH 123456\u04AC".toLocaleLowerCase();

    assertEq(s2, "abcdefg\u1200abcdefgh 123456\u04AD");

    // For toLowerCase, every Latin1 character maps to a Latin1 character.

    for (var i=0; i <= 0xff; i++) {

	var s = "\u1200\u11AA" + String.fromCharCode(i);

	assertEq(s.toLowerCase().charCodeAt(2) <= 0xff, true);

testToLowerCase();

function testToUpperCase() {

    var s1 = "abcdefgABCDEFGH 12345";

    assertEq(isLatin1(s1), true);

    // Latin1

    var s2 = s1.toUpperCase();

    assertEq(isLatin1(s2), true);

    assertEq(s2, "ABCDEFGABCDEFGH 12345");

    s2 = s1.toLocaleUpperCase();

    assertEq(isLatin1(s2), true);

    assertEq(s2, "ABCDEFGABCDEFGH 12345");

    // TwoByte

    s2 = "abcdefg\u1200ABCDEFGH 12345\u1E0F".toUpperCase();

    assertEq(s2, "ABCDEFG\u1200ABCDEFGH 12345\u1E0E");

    s2 = "abcdefg\u1200ABCDEFGH 12345\u1E0F".toLocaleUpperCase();

    assertEq(s2, "ABCDEFG\u1200ABCDEFGH 12345\u1E0E");

    // Tricky case: Latin1 character \u00FF maps to \u0178, a

    // non-Latin1 character.

    s1 = "ABC\u00FF";

    assertEq(isLatin1(s1), true);

    s2 = s1.toUpperCase();

    assertEq(isLatin1(s2), false);

    assertEq(s2, "ABC\u0178");

testToUpperCase();