Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #4733 from timvandermeij/postscript-unit-tests

Browse Source 
Completes unit tests for PostScript evaluator and fixes two bugs in the evaluator itself
This commit is contained in:
Yury Delendik 2014-05-05 10:27:54 -05:00
commit b3f24ca0c7
2 changed files with 217 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/shared/function.js
View File

@ -659,14 +659,14 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
break;
case 'neg':
a = stack.pop();
stack.push(-b);
stack.push(-a);
break;
case 'not':
a = stack.pop();
if (isBool(a) && isBool(b)) {
stack.push(a && b);
if (isBool(a)) {
stack.push(!a);
} else {
stack.push(a & b);
stack.push(~a);
}
break;
case 'or':

246
test/unit/function_spec.js
View File

@ -81,7 +81,7 @@ describe('function', function() {
});
it('handles missing brackets', function() {
expect(function() { parse('{'); }).toThrow(
new Error('Unexpected symbol: found undefined expected 1.'));
new Error('Unexpected symbol: found undefined expected 1.'));
});
it('handles junk after the end', function() {
var number = 3.3;
@ -142,21 +142,41 @@ describe('function', function() {
var expectedStack = [3];
expect(stack).toMatchArray(expectedStack);
});
it('boolean ands', function() {
it('boolean and', function() {
var stack = evaluate('{ true false and }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('bitwise ands', function() {
it('bitwise and', function() {
var stack = evaluate('{ 254 1 and }');
var expectedStack = [254 & 1];
expect(stack).toMatchArray(expectedStack);
});
// TODO atan
// TODO bitshift
// TODO ceiling
// TODO copy
// TODO cos
it('calculates the inverse tangent of a number', function() {
var stack = evaluate('{ 90 atan }');
var expectedStack = [Math.atan(90)];
expect(stack).toMatchArray(expectedStack);
});
it('handles bitshifting ', function() {
var stack = evaluate('{ 50 2 bitshift }');
var expectedStack = [200];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the ceiling value', function() {
var stack = evaluate('{ 9.9 ceiling }');
var expectedStack = [10];
expect(stack).toMatchArray(expectedStack);
});
it('copies', function() {
var stack = evaluate('{ 99 98 2 copy }');
var expectedStack = [99, 98, 99, 98];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the cosine of a number', function() {
var stack = evaluate('{ 90 cos }');
var expectedStack = [Math.cos(90)];
expect(stack).toMatchArray(expectedStack);
});
it('converts to int', function() {
var stack = evaluate('{ 9.9 cvi }');
var expectedStack = [9];
@ -167,24 +187,76 @@ describe('function', function() {
var expectedStack = [-9];
expect(stack).toMatchArray(expectedStack);
});
// TODO cvr
// TODO div
it('converts to real', function() {
var stack = evaluate('{ 55.34 cvr }');
var expectedStack = [55.34];
expect(stack).toMatchArray(expectedStack);
});
it('divides', function() {
var stack = evaluate('{ 6 5 div }');
var expectedStack = [1.2];
expect(stack).toMatchArray(expectedStack);
});
it('maps division by zero to infinity', function() {
var stack = evaluate('{ 6 0 div }');
var expectedStack = [Infinity];
expect(stack).toMatchArray(expectedStack);
});
it('duplicates', function() {
var stack = evaluate('{ 99 dup }');
var expectedStack = [99, 99];
expect(stack).toMatchArray(expectedStack);
});
// TODO eq
it('accepts an equality', function() {
var stack = evaluate('{ 9 9 eq }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects an inequality', function() {
var stack = evaluate('{ 9 8 eq }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('exchanges', function() {
var stack = evaluate('{ 44 99 exch }');
var expectedStack = [99, 44];
expect(stack).toMatchArray(expectedStack);
});
// TODO exp
// TODO false
// TODO floor
// TODO ge
// TODO gt
it('handles exponentiation', function() {
var stack = evaluate('{ 10 2 exp }');
var expectedStack = [100];
expect(stack).toMatchArray(expectedStack);
});
it('pushes false onto the stack', function() {
var stack = evaluate('{ false }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the floor value', function() {
var stack = evaluate('{ 9.9 floor }');
var expectedStack = [9];
expect(stack).toMatchArray(expectedStack);
});
it('handles greater than or equal to', function() {
var stack = evaluate('{ 10 9 ge }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects less than for greater than or equal to', function() {
var stack = evaluate('{ 8 9 ge }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('handles greater than', function() {
var stack = evaluate('{ 10 9 gt }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects less than or equal for greater than', function() {
var stack = evaluate('{ 9 9 gt }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('divides to integer', function() {
var stack = evaluate('{ 2 3 idiv }');
var expectedStack = [0];
@ -200,16 +272,86 @@ describe('function', function() {
var expectedStack = [4, 3, 2, 1, 3];
expect(stack).toMatchArray(expectedStack);
});
// TODO le
// TODO ln
// TODO log
// TODO lt
// TODO mod
// TODO mul
// TODO ne
// TODO neg
// TODO not
// TODO or
it('handles less than or equal to', function() {
var stack = evaluate('{ 9 10 le }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects greater than for less than or equal to', function() {
var stack = evaluate('{ 10 9 le }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the natural logarithm', function() {
var stack = evaluate('{ 10 ln }');
var expectedStack = [Math.log(10)];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the base 10 logarithm', function() {
var stack = evaluate('{ 100 log }');
var expectedStack = [2];
expect(stack).toMatchArray(expectedStack);
});
it('handles less than', function() {
var stack = evaluate('{ 9 10 lt }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects greater than or equal to for less than', function() {
var stack = evaluate('{ 10 9 lt }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('performs the modulo operation', function() {
var stack = evaluate('{ 4 3 mod }');
var expectedStack = [1];
expect(stack).toMatchArray(expectedStack);
});
it('multiplies two numbers (positive result)', function() {
var stack = evaluate('{ 9 8 mul }');
var expectedStack = [72];
expect(stack).toMatchArray(expectedStack);
});
it('multiplies two numbers (negative result)', function() {
var stack = evaluate('{ 9 -8 mul }');
var expectedStack = [-72];
expect(stack).toMatchArray(expectedStack);
});
it('accepts an inequality', function() {
var stack = evaluate('{ 9 8 ne }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('rejects an equality', function() {
var stack = evaluate('{ 9 9 ne }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('negates', function() {
var stack = evaluate('{ 4.5 neg }');
var expectedStack = [-4.5];
expect(stack).toMatchArray(expectedStack);
});
it('boolean not', function() {
var stack = evaluate('{ true not }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('bitwise not', function() {
var stack = evaluate('{ 12 not }');
var expectedStack = [-13];
expect(stack).toMatchArray(expectedStack);
});
it('boolean or', function() {
var stack = evaluate('{ true false or }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('bitwise or', function() {
var stack = evaluate('{ 254 1 or }');
var expectedStack = [254 | 1];
expect(stack).toMatchArray(expectedStack);
});
it('pops stack', function() {
var stack = evaluate('{ 1 2 pop }');
var expectedStack = [1];
@ -225,13 +367,51 @@ describe('function', function() {
var expectedStack = [3, 2, 2, 1];
expect(stack).toMatchArray(expectedStack);
});
// TODO round
// TODO sin
// TODO sqrt
// TODO sub
// TODO true
// TODO truncate
// TODO xor
it('rounds a number', function() {
var stack = evaluate('{ 9.52 round }');
var expectedStack = [10];
expect(stack).toMatchArray(expectedStack);
});
it('calculates the sine of a number', function() {
var stack = evaluate('{ 90 sin }');
var expectedStack = [Math.sin(90)];
expect(stack).toMatchArray(expectedStack);
});
it('calculates a square root (integer)', function() {
var stack = evaluate('{ 100 sqrt }');
var expectedStack = [10];
expect(stack).toMatchArray(expectedStack);
});
it('calculates a square root (float)', function() {
var stack = evaluate('{ 99 sqrt }');
var expectedStack = [Math.sqrt(99)];
expect(stack).toMatchArray(expectedStack);
});
it('subtracts (positive result)', function() {
var stack = evaluate('{ 6 4 sub }');
var expectedStack = [2];
expect(stack).toMatchArray(expectedStack);
});
it('subtracts (negative result)', function() {
var stack = evaluate('{ 4 6 sub }');
var expectedStack = [-2];
expect(stack).toMatchArray(expectedStack);
});
it('pushes true onto the stack', function() {
var stack = evaluate('{ true }');
var expectedStack = [true];
expect(stack).toMatchArray(expectedStack);
});
it('truncates a number', function() {
var stack = evaluate('{ 35.004 truncate }');
var expectedStack = [35];
expect(stack).toMatchArray(expectedStack);
});
it('calculates an exclusive or value', function() {
var stack = evaluate('{ 3 9 xor }');
var expectedStack = [10];
expect(stack).toMatchArray(expectedStack);
});
});
});