72 lines
2.7 KiB
JavaScript
72 lines
2.7 KiB
JavaScript
description("test that comparison operators work correctly.")
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function makeTest(start, end, expression, relationship, override, invert) {
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var resultValue = eval(relationship + expression + 0) || !!override;
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if (invert)
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resultValue = !resultValue;
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var expr = start + expression + end;
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var result = [];
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function func(content) { var f = new Function(content); f.toString = function(){ return content}; return f; }
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result.push([new func("return " + expr + ";"), resultValue]);
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result.push([new func("if (" + expr + ") return true; return false;"), resultValue]);
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result.push([new func("var k = 0; while (" + expr + ") if (k++) return true; return false;"), resultValue]);
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result.push([new func("var k = 0; for (; " + expr + "; ) if (k++) return true; return false;"), resultValue]);
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return result;
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}
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function doTest(lhs, rhs, relationship) {
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var expressionParts = [["(",")"],["(", ") || 1", true],["(", ") && 1"],["(", ") || 1", true],["1 || (",")", true],["1 && (",")"]];
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var expressions = [];
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var tests = [];
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for (var i = 0; i < expressionParts.length; i++) {
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var start = expressionParts[i][0] + lhs;
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var end = String(rhs) + expressionParts[i][1];
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tests.push.apply(tests, makeTest(start, end, "==", relationship, expressionParts[i][2]));
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tests.push.apply(tests, makeTest(start, end, "!=", relationship, expressionParts[i][2]));
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tests.push.apply(tests, makeTest(start, end, "===", relationship, expressionParts[i][2]));
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tests.push.apply(tests, makeTest(start, end, "!==", relationship, expressionParts[i][2]));
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}
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for (var i = 0; i < tests.length; i++) {
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if ((r=tests[i][0]()) == tests[i][1])
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testPassed(tests[i][0] + " is " + tests[i][1]);
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else
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testFailed(tests[i][0] + " is " + r + " and should be " + tests[i][1] + ".");
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}
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}
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var letterA = "a";
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var letterB = "b";
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var One = 1;
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var Zero = 0;
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doTest('"a"', '"b"', -1);
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doTest('"a"', '"a"', 0);
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doTest('"b"', '"a"', 1);
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doTest('letterA', '"b"', -1);
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doTest('letterA', '"a"', 0);
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doTest('"b"', '"a"', 1);
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doTest('letterA', '"b"', -1);
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doTest('letterA', 'letterA', 0);
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doTest('"b"', 'letterA', 1);
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doTest('"a"', '"b"', -1);
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doTest('"a"', 'letterA', 0);
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doTest('"b"', 'letterA', 1);
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doTest('"a"', '0', NaN);
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doTest('0', '"a"', NaN);
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doTest('letterA', '0', NaN);
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doTest('letterA', '"a"', 0);
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doTest('0', '"a"', NaN);
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doTest('letterA', 'letterA', 0);
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doTest('0', 'letterA', NaN);
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doTest('"a"', 'letterA', 0);
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doTest('0', 'letterA', NaN);
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doTest('0', '1', -1);
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doTest('0', '0', 0);
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doTest('1', '0', 1);
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doTest('Zero', '1', -1);
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doTest('Zero', '0', 0);
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doTest('1', 'Zero', 1);
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doTest('0', 'One', -1);
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doTest('One', '0', 1);
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