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Add compiler passes tests (currently testing the one pass that exists)

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David Majda 2010-08-21 14:36:44 +02:00
parent 95f70c9562
commit 8918d77da1
2 changed files with 151 additions and 0 deletions
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1
test/index.html
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@ -8,6 +8,7 @@
<script src="../lib/peg.js"></script> <script src="../lib/peg.js"></script>
<script src="compiler-test.js"></script> <script src="compiler-test.js"></script>
<script src="checks-test.js"></script> <script src="checks-test.js"></script>
<script src="passes-test.js"></script>
<script src="parser-test.js"></script> <script src="parser-test.js"></script>
</head> </head>
<body> <body>

150
test/passes-test.js Normal file
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@ -0,0 +1,150 @@
(function(global) {
module("PEG.compiler.passes");
test("removes proxy rules", function() {
function simpleGrammar(rules, startRule) {
return {
type: "grammar",
initializer: null,
rules: rules,
startRule: startRule
}
}
var proxiedRule = {
type: "rule",
name: "proxied",
displayName: null,
expression: { type: "literal", value: "a" }
};
var proxiedRuleRef = {
type: "rule_ref",
name: "proxied"
}
function simpleGrammarWithStartAndProxied(startRuleExpression) {
return simpleGrammar(
{
start: {
type: "rule",
name: "start",
displayName: null,
expression: startRuleExpression
},
proxied: proxiedRule
},
"start"
);
}
var cases = [
{
grammar: 'start = proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammar({ proxied: proxiedRule }, "proxied")
},
{
grammar: 'start = proxy / "a" / "b"; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "choice",
alternatives: [
proxiedRuleRef,
{ type: "literal", value: "a" },
{ type: "literal", value: "b" }
]
})
},
{
grammar: 'start = "a" / "b" / proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "choice",
alternatives: [
{ type: "literal", value: "a" },
{ type: "literal", value: "b" },
proxiedRuleRef
]
})
},
{
grammar: 'start = proxy "a" "b"; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "sequence",
elements: [
proxiedRuleRef,
{ type: "literal", value: "a" },
{ type: "literal", value: "b" }
]
})
},
{
grammar: 'start = "a" "b" proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "sequence",
elements: [
{ type: "literal", value: "a" },
{ type: "literal", value: "b" },
proxiedRuleRef
]
})
},
{
grammar: 'start = label:proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "labeled",
label: "label",
expression: proxiedRuleRef
})
},
{
grammar: 'start = &proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "simple_and",
expression: proxiedRuleRef
})
},
{
grammar: 'start = !proxy; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "simple_not",
expression: proxiedRuleRef
})
},
{
grammar: 'start = proxy?; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "optional",
expression: proxiedRuleRef
})
},
{
grammar: 'start = proxy*; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "zero_or_more",
expression: proxiedRuleRef
})
},
{
grammar: 'start = proxy+; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "one_or_more",
expression: proxiedRuleRef
})
},
{
grammar: 'start = proxy { }; proxy = proxied; proxied = "a"',
ast: simpleGrammarWithStartAndProxied({
type: "action",
code: " ",
expression: proxiedRuleRef
})
}
];
for (var i = 0; i < cases.length; i++) {
var ast = PEG.parser.parse(cases[i].grammar);
deepEqual(PEG.compiler.passes.proxyRules(ast), cases[i].ast);
}
});
})(this);