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Behavior specs cleanup: Improve literal specs

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This commit is contained in:
David Majda 2015-01-12 16:09:38 +01:00
parent 2faff0000e
commit 54191fbf12
1 changed files with 50 additions and 41 deletions
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91
spec/behavior/generated-parser-behavior.spec.js
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@ -220,54 +220,63 @@ describe("generated parser behavior", function() {
});
describe("literal", function() {
it("matches empty literal correctly", function() {
var parser = PEG.buildParser('start = ""', options);
describe("matching", function() {
it("matches empty literals", function() {
var parser = PEG.buildParser('start = ""', options);
expect(parser).toParse("", "");
expect(parser).toParse("");
});
it("matches one-character literals", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toParse("a");
expect(parser).toFailToParse("b");
});
it("matches multi-character literals", function() {
var parser = PEG.buildParser('start = "abcd"', options);
expect(parser).toParse("abcd");
expect(parser).toFailToParse("efgh");
});
it("is case sensitive without the \"i\" flag", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toParse("a");
expect(parser).toFailToParse("A");
});
it("is case insensitive with the \"i\" flag", function() {
var parser = PEG.buildParser('start = "a"i', options);
expect(parser).toParse("a");
expect(parser).toParse("A");
});
});
it("matches one-character literal correctly", function() {
var parser = PEG.buildParser('start = "a"', options);
describe("when it matches", function() {
it("returns the matched text", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toParse("a", "a");
expect(parser).toFailToParse("b");
expect(parser).toParse("a", "a");
});
it("advances parse position past the matched text", function() {
var parser = PEG.buildParser('start = "a" .', options);
expect(parser).toParse("ab");
});
});
it("matches multi-character literal correctly", function() {
var parser = PEG.buildParser('start = "abcd"', options);
describe("when it doesn't match", function() {
it("reports match failure and records an expectation of type \"literal\"", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toParse("abcd", "abcd");
expect(parser).toFailToParse("ebcd");
expect(parser).toFailToParse("afcd");
expect(parser).toFailToParse("abgd");
expect(parser).toFailToParse("abch");
});
it("is case sensitive without the \"i\" flag", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toParse("a", "a");
expect(parser).toFailToParse("A");
});
it("is case insensitive with the \"i\" flag", function() {
var parser = PEG.buildParser('start = "a"i', options);
expect(parser).toParse("a", "a");
expect(parser).toParse("A", "A");
});
it("advances position on success", function() {
var parser = PEG.buildParser('start = "a" .', options);
expect(parser).toParse("ab", ["a", "b"]);
});
it("sets expectation correctly on failure", function() {
var parser = PEG.buildParser('start = "a"', options);
expect(parser).toFailToParse("b", {
expected: [{ type: "literal", value: "a", description: '"a"' }]
expect(parser).toFailToParse("b", {
expected: [{ type: "literal", value: "a", description: '"a"' }]
});
});
});
});