Jasmine: Convert tests of parser's "whitespace" rule

spec/parser.spec.js

@@ -1,17 +1,73 @@
 describe("PEG.js grammar parser", function() {
-  it("works", function() {
-    expect(PEG.parser.parse('start = "a"')).toEqual({
+  var trivialGrammar;
+
+  beforeEach(function() {
+    trivialGrammar = {
       type:        "grammar",
       initializer: null,
       rules:       [
         {
-          type:       "rule",
-          name:       "start",
+          type:        "rule",
+          name:        "start",
           displayName: null,
-          expression:  { type: "literal", value: "a", ignoreCase: false }
+          expression:  { type: "literal", value: "abcd", ignoreCase: false }
         }
       ],
       startRule:   "start"
+    };
+
+    this.addMatchers({
+      toParseAs: function(expected) {
+        var result;
+
+        try {
+          result = PEG.parser.parse(this.actual);
+
+          this.message = function() {
+            return "Expected " + jasmine.pp(this.actual) + " "
+                 + (this.isNot ? "not " : "")
+                 + "to parse as " + jasmine.pp(expected) + ", "
+                 + "but it parsed as " + jasmine.pp(result) + ".";
+          };
+
+          return this.env.equals_(result, expected);
+        } catch (e) {
+          this.message = function() {
+            return "Expected " + jasmine.pp(this.actual) + " "
+                 + "to parse as " + jasmine.pp(expected) + ", "
+                 + "but it failed to parse with message "
+                 + jasmine.pp(e.message) + ".";
+          };
+
+          return false;
+        }
+      }
     });
   });
+
+  /* Canonical whitespace is " ". */
+  it("parses whitespace", function() {
+    expect('start =\t"abcd"'    ).toParseAs(trivialGrammar);
+    expect('start =\x0B"abcd"'  ).toParseAs(trivialGrammar); // no "\v" in IE
+    expect('start =\f"abcd"'    ).toParseAs(trivialGrammar);
+    expect('start = "abcd"'     ).toParseAs(trivialGrammar);
+    expect('start =\u00A0"abcd"').toParseAs(trivialGrammar);
+    expect('start =\uFEFF"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u1680"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u180E"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2000"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2001"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2002"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2003"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2004"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2005"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2006"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2007"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2008"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u2009"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u200A"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u202F"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u205F"abcd"').toParseAs(trivialGrammar);
+    expect('start =\u3000"abcd"').toParseAs(trivialGrammar);
+  });
 });

test/parser-test.js

@@ -580,31 +580,4 @@ test("parses eolChar", function() {
   parserParses('start =\u2029"abcd"', simpleGrammar);
 });
 
-/* Canonical whitespace is " ". */
-test("parses whitespace", function() {
-  parserParses('start =\t"abcd"',     simpleGrammar);
-  /* IE does not recognize "\v". */
-  parserParses('start =\x0B"abcd"',   simpleGrammar);
-  parserParses('start =\f"abcd"',     simpleGrammar);
-  parserParses('start = "abcd"',      simpleGrammar);
-  parserParses('start =\u00A0"abcd"', simpleGrammar);
-  parserParses('start =\uFEFF"abcd"', simpleGrammar);
-  parserParses('start =\u1680"abcd"', simpleGrammar);
-  parserParses('start =\u180E"abcd"', simpleGrammar);
-  parserParses('start =\u2000"abcd"', simpleGrammar);
-  parserParses('start =\u2001"abcd"', simpleGrammar);
-  parserParses('start =\u2002"abcd"', simpleGrammar);
-  parserParses('start =\u2003"abcd"', simpleGrammar);
-  parserParses('start =\u2004"abcd"', simpleGrammar);
-  parserParses('start =\u2005"abcd"', simpleGrammar);
-  parserParses('start =\u2006"abcd"', simpleGrammar);
-  parserParses('start =\u2007"abcd"', simpleGrammar);
-  parserParses('start =\u2008"abcd"', simpleGrammar);
-  parserParses('start =\u2009"abcd"', simpleGrammar);
-  parserParses('start =\u200A"abcd"', simpleGrammar);
-  parserParses('start =\u202F"abcd"', simpleGrammar);
-  parserParses('start =\u205F"abcd"', simpleGrammar);
-  parserParses('start =\u3000"abcd"', simpleGrammar);
-});
-
 })();