137 lines
3.6 KiB
C++
137 lines
3.6 KiB
C++
#include "spec_helper.h"
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#include "rules.h"
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using namespace rules;
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START_TEST
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describe("parsing pattern rules", []() {
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it("parses simple strings", [&]() {
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Pattern rule("abc");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(seq({
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character('a'),
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character('b'),
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character('c')
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})));
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});
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it("parses character classes", []() {
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Pattern rule("\\w-\\d");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(seq({
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character(CharClassWord),
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character('-'),
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character(CharClassDigit)
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})));
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});
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it("parses choices", []() {
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Pattern rule("ab|cd|ef");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(choice({
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seq({
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character('a'),
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character('b'),
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}),
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seq({
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character('c'),
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character('d')
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}),
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seq({
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character('e'),
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character('f')
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})
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})));
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});
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it("parses character sets", []() {
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Pattern rule("[abc]");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(character({ 'a', 'b', 'c' }, true)));
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});
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it("parses character ranges", []() {
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Pattern rule("[12a-dA-D3]");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(character({ '1', '2', CharacterRange({'a', 'd'}), CharacterRange({ 'A', 'D' }), '3' }, true)));
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});
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it("parses negated characters", []() {
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Pattern rule("[^a\\d]");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(character({ 'a', CharClassDigit }, false)));
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});
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it("parses backslashes", []() {
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Pattern rule("\\\\");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(character('\\')));
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});
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it("parses character groups in sequences", []() {
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Pattern rule("\"([^\"]|\\\\\")+\"");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(seq({
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character('"'),
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repeat(choice({
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character({ '"' }, false),
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seq({ character('\\'), character('"') })
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})),
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character('"')
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})));
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});
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it("parses choices in sequences", []() {
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Pattern rule("(a|b)cd");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(seq({
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choice({
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character('a'),
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character('b'),
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}),
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character('c'),
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character('d')
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})));
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});
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it("parses special characters when they are escaped", []() {
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Pattern rule("a\\(b");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(seq({
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character('a'),
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character('('),
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character('b')
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})));
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});
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it("parses repeating rules", []() {
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Pattern rule("(ab)+(cd)+");
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AssertThat(
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rule.to_rule_tree(),
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EqualsPointer(
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seq({
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repeat(seq({
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character('a'),
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character('b')
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})),
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repeat(seq({
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character('c'),
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character('d')
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})),
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})
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));
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});
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});
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END_TEST
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