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+<?php
+
+class JavaScriptMinifierTest extends PHPUnit\Framework\TestCase {
+
+ use MediaWikiCoversValidator;
+
+ public static function provideCases() {
+ return [
+
+ // Basic whitespace and comments that should be stripped entirely
+ [ "\r\t\f \v\n\r", "" ],
+ [ "/* Foo *\n*bar\n*/", "" ],
+
+ /**
+ * Slashes used inside block comments (T28931).
+ * At some point there was a bug that caused this comment to be ended at '* /',
+ * causing /M... to be left as the beginning of a regex.
+ */
+ [
+ "/**\n * Foo\n * {\n * 'bar' : {\n * "
+ . "//Multiple rules with configurable operators\n * 'baz' : false\n * }\n */",
+ "" ],
+
+ /**
+ * ' Foo \' bar \
+ * baz \' quox ' .
+ */
+ [
+ "' Foo \\' bar \\\n baz \\' quox ' .length",
+ "' Foo \\' bar \\\n baz \\' quox '.length"
+ ],
+ [
+ "\" Foo \\\" bar \\\n baz \\\" quox \" .length",
+ "\" Foo \\\" bar \\\n baz \\\" quox \".length"
+ ],
+ [ "// Foo b/ar baz", "" ],
+ [
+ "/ Foo \\/ bar [ / \\] / ] baz / .length",
+ "/ Foo \\/ bar [ / \\] / ] baz /.length"
+ ],
+
+ // HTML comments
+ [ "<!-- Foo bar", "" ],
+ [ "<!-- Foo --> bar", "" ],
+ [ "--> Foo", "" ],
+ [ "x --> y", "x-->y" ],
+
+ // Semicolon insertion
+ [ "(function(){return\nx;})", "(function(){return\nx;})" ],
+ [ "throw\nx;", "throw\nx;" ],
+ [ "while(p){continue\nx;}", "while(p){continue\nx;}" ],
+ [ "while(p){break\nx;}", "while(p){break\nx;}" ],
+ [ "var\nx;", "var x;" ],
+ [ "x\ny;", "x\ny;" ],
+ [ "x\n++y;", "x\n++y;" ],
+ [ "x\n!y;", "x\n!y;" ],
+ [ "x\n{y}", "x\n{y}" ],
+ [ "x\n+y;", "x+y;" ],
+ [ "x\n(y);", "x(y);" ],
+ [ "5.\nx;", "5.\nx;" ],
+ [ "0xFF.\nx;", "0xFF.x;" ],
+ [ "5.3.\nx;", "5.3.x;" ],
+
+ // Cover failure case for incomplete hex literal
+ [ "0x;", false, false ],
+
+ // Cover failure case for number with no digits after E
+ [ "1.4E", false, false ],
+
+ // Cover failure case for number with several E
+ [ "1.4EE2", false, false ],
+ [ "1.4EE", false, false ],
+
+ // Cover failure case for number with several E (nonconsecutive)
+ // FIXME: This is invalid, but currently tolerated
+ [ "1.4E2E3", "1.4E2 E3", false ],
+
+ // Semicolon insertion between an expression having an inline
+ // comment after it, and a statement on the next line (T29046).
+ [
+ "var a = this //foo bar \n for ( b = 0; c < d; b++ ) {}",
+ "var a=this\nfor(b=0;c<d;b++){}"
+ ],
+
+ // Cover failure case of incomplete regexp at end of file (T75556)
+ // FIXME: This is invalid, but currently tolerated
+ [ "*/", "*/", false ],
+
+ // Cover failure case of incomplete char class in regexp (T75556)
+ // FIXME: This is invalid, but currently tolerated
+ [ "/a[b/.test", "/a[b/.test", false ],
+
+ // Cover failure case of incomplete string at end of file (T75556)
+ // FIXME: This is invalid, but currently tolerated
+ [ "'a", "'a", false ],
+
+ // Token separation
+ [ "x in y", "x in y" ],
+ [ "/x/g in y", "/x/g in y" ],
+ [ "x in 30", "x in 30" ],
+ [ "x + ++ y", "x+ ++y" ],
+ [ "x ++ + y", "x++ +y" ],
+ [ "x / /y/.exec(z)", "x/ /y/.exec(z)" ],
+
+ // State machine
+ [ "/ x/g", "/ x/g" ],
+ [ "(function(){return/ x/g})", "(function(){return/ x/g})" ],
+ [ "+/ x/g", "+/ x/g" ],
+ [ "++/ x/g", "++/ x/g" ],
+ [ "x/ x/g", "x/x/g" ],
+ [ "(/ x/g)", "(/ x/g)" ],
+ [ "if(/ x/g);", "if(/ x/g);" ],
+ [ "(x/ x/g)", "(x/x/g)" ],
+ [ "([/ x/g])", "([/ x/g])" ],
+ [ "+x/ x/g", "+x/x/g" ],
+ [ "{}/ x/g", "{}/ x/g" ],
+ [ "+{}/ x/g", "+{}/x/g" ],
+ [ "(x)/ x/g", "(x)/x/g" ],
+ [ "if(x)/ x/g", "if(x)/ x/g" ],
+ [ "for(x;x;{}/ x/g);", "for(x;x;{}/x/g);" ],
+ [ "x;x;{}/ x/g", "x;x;{}/ x/g" ],
+ [ "x:{}/ x/g", "x:{}/ x/g" ],
+ [ "switch(x){case y?z:{}/ x/g:{}/ x/g;}", "switch(x){case y?z:{}/x/g:{}/ x/g;}" ],
+ [ "function x(){}/ x/g", "function x(){}/ x/g" ],
+ [ "+function x(){}/ x/g", "+function x(){}/x/g" ],
+
+ // Multiline quoted string
+ [ "var foo=\"\\\nblah\\\n\";", "var foo=\"\\\nblah\\\n\";" ],
+
+ // Multiline quoted string followed by string with spaces
+ [
+ "var foo=\"\\\nblah\\\n\";\nvar baz = \" foo \";\n",
+ "var foo=\"\\\nblah\\\n\";var baz=\" foo \";"
+ ],
+
+ // URL in quoted string ( // is not a comment)
+ [
+ "aNode.setAttribute('href','http://foo.bar.org/baz');",
+ "aNode.setAttribute('href','http://foo.bar.org/baz');"
+ ],
+
+ // URL in quoted string after multiline quoted string
+ [
+ "var foo=\"\\\nblah\\\n\";\naNode.setAttribute('href','http://foo.bar.org/baz');",
+ "var foo=\"\\\nblah\\\n\";aNode.setAttribute('href','http://foo.bar.org/baz');"
+ ],
+
+ // Division vs. regex nastiness
+ [
+ "alert( (10+10) / '/'.charCodeAt( 0 ) + '//' );",
+ "alert((10+10)/'/'.charCodeAt(0)+'//');"
+ ],
+ [ "if(1)/a /g.exec('Pa ss');", "if(1)/a /g.exec('Pa ss');" ],
+
+ // newline insertion after 1000 chars: break after the "++", not before
+ [ str_repeat( ';', 996 ) . "if(x++);", str_repeat( ';', 996 ) . "if(x++\n);" ],
+
+ // Unicode letter characters should pass through ok in identifiers (T33187)
+ [ "var KaŝSkatolVal = {}", 'var KaŝSkatolVal={}' ],
+
+ // Per spec unicode char escape values should work in identifiers,
+ // as long as it's a valid char. In future it might get normalized.
+ [ "var Ka\\u015dSkatolVal = {}", 'var Ka\\u015dSkatolVal={}' ],
+
+ // Some structures that might look invalid at first sight
+ [ "var a = 5.;", "var a=5.;" ],
+ [ "5.0.toString();", "5.0.toString();" ],
+ [ "5..toString();", "5..toString();" ],
+ // Cover failure case for too many decimal points
+ [ "5...toString();", false ],
+ [ "5.\n.toString();", '5..toString();' ],
+
+ // Boolean minification (!0 / !1)
+ [ "var a = { b: true };", "var a={b:!0};" ],
+ [ "var a = { true: 12 };", "var a={true:12};", false ],
+ [ "a.true = 12;", "a.true=12;", false ],
+ [ "a.foo = true;", "a.foo=!0;" ],
+ [ "a.foo = false;", "a.foo=!1;" ],
+ ];
+ }
+
+ /**
+ * @dataProvider provideCases
+ * @covers JavaScriptMinifier::minify
+ * @covers JavaScriptMinifier::parseError
+ */
+ public function testMinifyOutput( $code, $expectedOutput, $expectedValid = true ) {
+ $minified = JavaScriptMinifier::minify( $code );
+
+ // JSMin+'s parser will throw an exception if output is not valid JS.
+ // suppression of warnings needed for stupid crap
+ if ( $expectedValid ) {
+ Wikimedia\suppressWarnings();
+ $parser = new JSParser();
+ Wikimedia\restoreWarnings();
+ $parser->parse( $minified, 'minify-test.js', 1 );
+ }
+
+ $this->assertEquals(
+ $expectedOutput,
+ $minified,
+ "Minified output should be in the form expected."
+ );
+ }
+
+ public static function provideExponentLineBreaking() {
+ return [
+ [
+ // This one gets interpreted all together by the prior code;
+ // no break at the 'E' happens.
+ '1.23456789E55',
+ ],
+ [
+ // This one breaks under the bad code; splits between 'E' and '+'
+ '1.23456789E+5',
+ ],
+ [
+ // This one breaks under the bad code; splits between 'E' and '-'
+ '1.23456789E-5',
+ ],
+ ];
+ }
+
+ /**
+ * @dataProvider provideExponentLineBreaking
+ * @covers JavaScriptMinifier::minify
+ */
+ public function testExponentLineBreaking( $num ) {
+ // Long line breaking was being incorrectly done between the base and
+ // exponent part of a number, causing a syntax error. The line should
+ // instead break at the start of the number. (T34548)
+ $prefix = 'var longVarName' . str_repeat( '_', 973 ) . '=';
+ $suffix = ',shortVarName=0;';
+
+ $input = $prefix . $num . $suffix;
+ $expected = $prefix . "\n" . $num . $suffix;
+
+ $minified = JavaScriptMinifier::minify( $input );
+
+ $this->assertEquals( $expected, $minified, "Line breaks must not occur in middle of exponent" );
+ }
+}
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