assertEq(isLatin1("Foo123\u1200" ), false );
s = "Foo123" ;
assertEq(isLatin1(s), true );
function testEq(s) {
assertEq(isLatin1(s), true );
assertEq(s === "foo02" , false );
assertEq(s == "foo02" , false );
// Non-atomized to force char comparison.
var nonAtomized = "\u1234foo01\u00c7" .substr(1);
assertEq(isLatin1(nonAtomized), false );
assertEq(s === nonAtomized, true );
assertEq(nonAtomized !== s, false );
assertEq(nonAtomized == s, true );
assertEq(s, nonAtomized);
nonAtomized = "\u1234foo02" .substr(1);
assertEq(isLatin1(nonAtomized), false );
assertEq(s === nonAtomized, false );
assertEq(nonAtomized == s, false );
}
s = "foo01\u00c7" ;
testEq(s);
testEq(s);
function testConcat() {
function concat(s1, s2) {
return s1 + s2;
}
// Following tests create fat inline strings.
assertEq(concat("abc" , "def" ), "abcdef" );
var s1 = "ABC" ;
var s2 = "DEF" ;
assertEq(concat(s1, s2), "ABCDEF" );
assertEq(concat(s1, "GHI\u0580" ), "ABCGHI\u0580" );
assertEq(concat("GHI\u0580" , s2), "GHI\u0580DEF" );
assertEq(concat(concat("GHI\u0580" , s2), s1), "GHI\u0580DEFABC" );
assertEq(isLatin1(s1), true );
assertEq(isLatin1(s2), true );
// Create a Latin1 rope.
var s3 = "0123456789012345678901234567890123456789" ;
var rope = concat(s1, s3);
assertEq(isLatin1(rope), true );
assertEq(rope, "ABC0123456789012345678901234567890123456789" );
assertEq(isLatin1(rope), true ); // Still Latin1 after flattening.
// Latin1 + TwoByte => TwoByte rope.
assertEq(isLatin1(s3), true );
rope = concat(s3, "someTwoByteString\u0580" );
assertEq(isLatin1(rope), false );
assertEq(rope, "0123456789012345678901234567890123456789someTwoByteString\u0580" );
assertEq(isLatin1(rope), false );
assertEq(isLatin1(s3), true );
rope = concat("twoByteString\u0580" , concat(s3, "otherTwoByte\u0580" ));
assertEq(isLatin1(rope), false );
assertEq(rope, "twoByteString\u05800123456789012345678901234567890123456789otherTwoByte\u0580" );
assertEq(isLatin1(rope), false );
// Build a Latin1 rope with left-most string an extensible string.
var s4 = "adsfasdfjkasdfkjasdfasasdfasdf" ;
for (var i=0; i<5; i++) {
s4 = concat(s4, s1);
assertEq(s4 === "." .repeat(s4.length), false ); // Flatten rope.
}
assertEq(isLatin1(s4), true );
// Appending a TwoByte string must inflate.
s4 = concat(s4, "--\u0580" );
assertEq(s4, "adsfasdfjkasdfkjasdfasasdfasdfABCABCABCABCABC--\u0580" );
}
testConcat();
function testFlattenDependent() {
function concat(s1, s2) {
return s1 + s2;
}
// Create some latin1 strings.
var s1 = "Foo0123456789bar012345---" ;
var s2 = "Foo0123456789bar012345+++" ;
assertEq(isLatin1(s1), true );
assertEq(isLatin1(s2), true );
// And some ropes.
var rope1 = concat(s1, s1);
assertEq(isLatin1(rope1), true );
var rope2 = concat(rope1, s2);
assertEq(isLatin1(rope2), true );
var rope3 = concat("twoByte\u0581" , rope2);
assertEq(isLatin1(rope3), false );
// Flatten everything.
assertEq(rope3, "twoByte\u0581Foo0123456789bar012345---Foo0123456789bar012345---Foo0123456789bar012345+++" );
assertEq(isLatin1(rope3), false );
// rope1 and rope2 were Latin1, but flattening rope3 turned them into
// dependent strings, so rope1 and rope2 must also be TwoByte now.
assertEq(isLatin1(rope1), false );
assertEq(isLatin1(rope2), false );
assertEq(rope1, "Foo0123456789bar012345---Foo0123456789bar012345---" );
assertEq(rope2, "Foo0123456789bar012345---Foo0123456789bar012345---Foo0123456789bar012345+++" );
}
testFlattenDependent();
Messung V0.5 C=93 H=99 G=95
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*© Formatika GbR, Deutschland