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Switch to a single "code stack".

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This commit is contained in:
Brendan Dahl 2011-12-29 13:41:54 -08:00
parent 2e82588145
commit 20dace0513
2 changed files with 34 additions and 49 deletions
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29
test/unit/function_spec.js
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@ -38,51 +38,39 @@ describe('function', function() {
}
it('parses empty programs', function() {
var output = parse('{}');
expect(output[0].length).toEqual(0);
expect(output.length).toEqual(0);
});
it('parses positive numbers', function() {
var number = 999;
var program = parse('{ ' + number + ' }');
var expectedProgram = [
['push'], [number]
];
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses negative numbers', function() {
var number = -999;
var program = parse('{ ' + number + ' }');
var expectedProgram = [
['push'], [number]
];
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses negative floats', function() {
var number = 3.3;
var program = parse('{ ' + number + ' }');
var expectedProgram = [
['push'], [number]
];
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses operators', function() {
var program = parse('{ sub }');
var expectedProgram = [
['sub'], [null]
];
var expectedProgram = ['sub'];
expect(program).toMatchArray(expectedProgram);
});
it('parses if statements', function() {
var program = parse('{ { 99 } if }');
var expectedProgram = [
['jz', 'push'], [2, 99]
];
var expectedProgram = [3, 'jz', 99];
expect(program).toMatchArray(expectedProgram);
});
it('parses ifelse statements', function() {
var program = parse('{ { 99 } { 44 } ifelse }');
var expectedProgram = [
['jz', 'push', 'j', 'push'], [3, 99, 4, 44]
];
var expectedProgram = [5, 'jz', 99, 6, 'j', 44];
expect(program).toMatchArray(expectedProgram);
});
it('handles missing brackets', function() {
@ -96,10 +84,11 @@ describe('function', function() {
var stream = new StringStream(program);
var parser = new PostScriptParser(new PostScriptLexer(stream));
var code = parser.parse();
var evaluator = new PostScriptEvaluator(code[0], code[1]);
var evaluator = new PostScriptEvaluator(code);
var output = evaluator.execute();
return output;
}
it('pushes stack', function() {
var stack = evaluate('{ 99 }');
var expectedStack = [99];