Jasmine: Convert action code tests
This commit is contained in:
David Majda
parent
b06bd774f5
commit
03716a562d
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@ -91,6 +91,80 @@ describe("generated parser", function() {
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});
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});
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describe("action code", function() {
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varyAll(function(options) {
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it("tranforms the expression result by returnung a non-|null| value", function() {
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var parser = PEG.buildParser('start = "a" { return 42; }', options);
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expect(parser).toParse("a", 42);
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});
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it("causes match failure by returning |null|", function() {
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var parser = PEG.buildParser('start = "a" { return null; }', options);
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expect(parser).toFailToParse("a");
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});
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it("is not called when the expression does not match", function() {
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var parser = PEG.buildParser(
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'start = "a" { throw "Boom!"; } / "b"',
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options
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);
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expect(parser).toParse("b", "b");
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});
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it("can use label variables", function() {
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var parser = PEG.buildParser('start = a:"a" { return a; }', options);
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expect(parser).toParse("a", "a");
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});
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it("can use the |offset| variable to get the current parse position", function() {
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var parser = PEG.buildParser(
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'start = "a" ("b" { return offset; })',
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options
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);
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expect(parser).toParse("ab", ["a", 1]);
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});
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if (options.trackLineAndColumn) {
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it("can use the |line| and |column| variables to get the current line and column", function() {
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var parser = PEG.buildParser([
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'{ var result; }',
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'start = line (nl+ line)* { return result; }',
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'line = thing (" "+ thing)*',
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'thing = digit / mark',
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'digit = [0-9]',
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'mark = "x" { result = [line, column]; }',
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'nl = ("\\r" / "\\n" / "\\u2028" / "\\u2029")'
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].join("\n"), options);
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expect(parser).toParse("1\n2\n\n3\n\n\n4 5 x", [7, 5]);
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/* Non-Unix newlines */
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expect(parser).toParse("1\rx", [2, 1]); // Old Mac
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expect(parser).toParse("1\r\nx", [2, 1]); // Windows
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expect(parser).toParse("1\n\rx", [3, 1]); // mismatched
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/* Strange newlines */
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expect(parser).toParse("1\u2028x", [2, 1]); // line separator
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expect(parser).toParse("1\u2029x", [2, 1]); // paragraph separator
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});
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}
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it("does not advance position when the expression matches but the action returns |null|", function() {
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var parser = PEG.buildParser(
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'start = "a" { return null; } / "a"',
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options
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);
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expect(parser).toParse("a", "a");
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});
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});
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});
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describe("rule reference matching", function() {
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varyAll(function(options) {
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it("follows rule references", function() {
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@ -449,152 +449,6 @@ testWithVaryingTrackLineAndColumn("one or more expressions", function(options) {
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parses(parser, "aaa", ["a", "a", "a"]);
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});
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test("actions (with trackLineAndColumn: false)", function() {
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var options = { trackLineAndColumn: false };
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var singleElementUnlabeledParser = PEG.buildParser(
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'start = "a" { return arguments.length; }',
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options
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);
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parses(singleElementUnlabeledParser, "a", 1);
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var singleElementLabeledParser = PEG.buildParser(
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'start = a:"a" { return [arguments.length, offset, a]; }',
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options
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);
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parses(singleElementLabeledParser, "a", [2, 0, "a"]);
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var multiElementUnlabeledParser = PEG.buildParser(
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'start = "a" "b" "c" { return arguments.length; }',
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options
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);
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parses(multiElementUnlabeledParser, "abc", 1);
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var multiElementLabeledParser = PEG.buildParser(
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'start = a:"a" "b" c:"c" { return [arguments.length, offset, a, c]; }',
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options
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);
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parses(multiElementLabeledParser, "abc", [3, 0, "a", "c"]);
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var innerElementsUnlabeledParser = PEG.buildParser(
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'start = "a" ("b" "c" "d" { return arguments.length; }) "e"',
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options
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);
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parses(innerElementsUnlabeledParser, "abcde", ["a", 1, "e"]);
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var innerElementsLabeledParser = PEG.buildParser([
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'start = "a"',
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' (b:"b" "c" d:"d" { return [arguments.length, offset, b, d]; })',
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' "e"'
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].join("\n"), options);
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parses(innerElementsLabeledParser, "abcde", ["a", [3, 1, "b", "d"], "e"]);
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/*
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* Test that the parsing position returns after successfull parsing of the
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* action expression and action returning |null|.
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*/
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var posTestParser = PEG.buildParser(
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'start = "a" { return null; } / "a"',
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options
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);
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parses(posTestParser, "a", "a");
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/* Test that the action is not called when its expression does not match. */
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var notAMatchParser = PEG.buildParser(
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'start = "a" { ok(false, "action got called when it should not be"); }',
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options
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);
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doesNotParse(notAMatchParser, "b");
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});
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test("actions (with trackLineAndColumn: true)", function() {
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var options = { trackLineAndColumn: true };
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var singleElementUnlabeledParser = PEG.buildParser(
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'start = "a" { return arguments.length; }',
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options
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);
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parses(singleElementUnlabeledParser, "a", 3);
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var singleElementLabeledParser = PEG.buildParser(
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'start = a:"a" { return [arguments.length, offset, line, column, a]; }',
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options
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);
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parses(singleElementLabeledParser, "a", [4, 0, 1, 1, "a"]);
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var multiElementUnlabeledParser = PEG.buildParser(
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'start = "a" "b" "c" { return arguments.length; }',
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options
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);
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parses(multiElementUnlabeledParser, "abc", 3);
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var multiElementLabeledParser = PEG.buildParser([
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'start = a:"a" "b" c:"c" {',
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' return [arguments.length, offset, line, column, a, c];',
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'}'
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].join("\n"), options);
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parses(multiElementLabeledParser, "abc", [5, 0, 1, 1, "a", "c"]);
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var innerElementsUnlabeledParser = PEG.buildParser(
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'start = "a" ("b" "c" "d" { return arguments.length; }) "e"',
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options
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);
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parses(innerElementsUnlabeledParser, "abcde", ["a", 3, "e"]);
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var innerElementsLabeledParser = PEG.buildParser([
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'start = "a"',
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' (',
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' b:"b" "c" d:"d" {',
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' return [arguments.length, offset, line, column, b, d];',
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' }',
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' )',
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' "e"'
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].join("\n"), options);
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parses(
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innerElementsLabeledParser,
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"abcde",
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["a", [5, 1, 1, 2, "b", "d"], "e"]
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);
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/*
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* Test that the parsing position returns after successfull parsing of the
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* action expression and action returning |null|.
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*/
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var posTestParser = PEG.buildParser(
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'start = "a" { return null; } / "a"',
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options
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);
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parses(posTestParser, "a", "a");
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/* Test that the action is not called when its expression does not match. */
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var notAMatchParser = PEG.buildParser(
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'start = "a" { ok(false, "action got called when it should not be"); }',
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options
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);
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doesNotParse(notAMatchParser, "b");
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var numbersParser = PEG.buildParser([
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'{ var result; }',
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'start = line (nl+ line)* { return result; }',
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'line = thing (" "+ thing)*',
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'thing = digit / mark',
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'digit = [0-9]',
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'mark = "x" { result = [line, column]; }',
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'nl = ("\\r" / "\\n" / "\\u2028" / "\\u2029")'
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].join("\n"), options);
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parses(numbersParser, "1\n2\n\n3\n\n\n4 5 x", [7, 5]);
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/* Non-Unix newlines */
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parses(numbersParser, "1\rx", [2, 1]); // Old Mac
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parses(numbersParser, "1\r\nx", [2, 1]); // Windows
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parses(numbersParser, "1\n\rx", [3, 1]); // mismatched
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/* Strange newlines */
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parses(numbersParser, "1\u2028x", [2, 1]); // line separator
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parses(numbersParser, "1\u2029x", [2, 1]); // paragraph separator
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});
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testWithVaryingTrackLineAndColumn("initializer", function(options) {
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var variableInActionParser = PEG.buildParser(
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'{ a = 42; }; start = "a" { return a; }',
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