Split-off |PEG.compiler.checks| tests

14 years ago · 1b75a7b9b3
parent b15eb0bb5f
commit 1b75a7b9b3
3 changed files with 59 additions and 53 deletions
--- a/test/checks-test.js
+++ b/test/checks-test.js
@ -0,0 +1,58 @@
 (function(global) {
 module("PEG.compiler.checks");
 test("reports missing referenced rules", function() {
  var grammars = [
    'start = missing',
    'start = missing / "a" / "b"',
    'start = "a" / "b" / missing',
    'start = missing "a" "b"',
    'start = "a" "b" missing',
    'start = label:missing',
    'start = &missing',
    'start = !missing',
    'start = missing?',
    'start = missing*',
    'start = missing+',
    'start = missing { }'
  ];
  for (var i = 0; i < grammars.length; i++) {
    throws(
      function() { PEG.buildParser(grammars[i]); },
      PEG.GrammarError,
      { message: "Referenced rule \"missing\" does not exist." }
    );
  }
 });
 test("reports left recursion", function() {
  var grammars = [
    /* Direct */
    'start = start',
    'start = start / "a" / "b"',
    'start = "a" / "b" / start',
    'start = start "a" "b"',
    'start = label:start',
    'start = &start',
    'start = !start',
    'start = start?',
    'start = start*',
    'start = start+',
    'start = start { }',
    /* Indirect */
    'start = stop; stop = start'
  ];
  for (var i = 0; i < grammars.length; i++) {
    throws(
      function() { PEG.buildParser(grammars[i]); },
      PEG.GrammarError,
      { message: "Left recursion detected for rule \"start\"." }
    );
  }
 });
 })(this);
--- a/test/compiler-test.js
+++ b/test/compiler-test.js
@ -66,59 +66,6 @@ test("buildParser reports syntax errors in the grammar", function() {
  );
 });
 test("buildParser reports missing referenced rules", function() {
  var grammars = [
    'start = missing',
    'start = missing / "a" / "b"',
    'start = "a" / "b" / missing',
    'start = missing "a" "b"',
    'start = "a" "b" missing',
    'start = label:missing',
    'start = &missing',
    'start = !missing',
    'start = missing?',
    'start = missing*',
    'start = missing+',
    'start = missing { }'
  ];
  for (var i = 0; i < grammars.length; i++) {
    throws(
      function() { PEG.buildParser(grammars[i]); },
      PEG.GrammarError,
      { message: "Referenced rule \"missing\" does not exist." }
    );
  }
 });
 test("buildParser reports left recursion", function() {
  var grammars = [
    /* Direct */
    'start = start',
    'start = start / "a" / "b"',
    'start = "a" / "b" / start',
    'start = start "a" "b"',
    'start = label:start',
    'start = &start',
    'start = !start',
    'start = start?',
    'start = start*',
    'start = start+',
    'start = start { }',
    /* Indirect */
    'start = stop; stop = start'
  ];
  for (var i = 0; i < grammars.length; i++) {
    throws(
      function() { PEG.buildParser(grammars[i]); },
      PEG.GrammarError,
      { message: "Left recursion detected for rule \"start\"." }
    );
  }
 });
 test("buildParser allows custom start rule", function() {
  var parser = PEG.buildParser('s = "abcd"', "s");
  parses(parser, "abcd", "abcd");
--- a/test/index.html
+++ b/test/index.html
@ -7,6 +7,7 @@
    <script src="vendor/qunit/qunit.js"></script>
    <script src="../lib/peg.js"></script>
    <script src="compiler-test.js"></script>
    <script src="checks-test.js"></script>
    <script src="parser-test.js"></script>
  </head>
  <body>