114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
#include "compiler_spec_helper.h"
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#include "compiler/rules/character_set.h"
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using namespace rules;
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START_TEST
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describe("character sets", []() {
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char max_char = 255;
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describe("computing the complement", [&]() {
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it("works for the set containing only the null character", [&]() {
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CharacterSet set1({ '\0' });
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auto set2 = set1.complement();
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AssertThat(set2, Equals(CharacterSet({
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{ 1, max_char }
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})));
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AssertThat(set2.complement(), Equals(set1));
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});
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it("works for single character sets", [&]() {
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CharacterSet set1({ 'b' });
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auto set2 = set1.complement();
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AssertThat(set2, Equals(CharacterSet({
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{ 0, 'a' },
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{ 'c', max_char },
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})));
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AssertThat(set2.complement(), Equals(set1));
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});
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});
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describe("computing unions", [&]() {
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it("works for disjoint sets", [&]() {
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CharacterSet set({ {'a', 'z'} });
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set.add_set(CharacterSet({ {'A', 'Z'} }));
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AssertThat(set, Equals(CharacterSet({ {'a', 'z'}, {'A', 'Z'} })));
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});
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it("works for sets with adjacent ranges", [&]() {
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CharacterSet set({ CharacterRange('a', 'r') });
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set.add_set(CharacterSet({ CharacterRange('s', 'z') }));
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AssertThat(set, Equals(CharacterSet({ {'a', 'z'} })));
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set = CharacterSet({ 'c' });
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auto c = set.complement();
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set.add_set(c);
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AssertThat(set, Equals(CharacterSet({ {0, max_char} })));
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});
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it("works when the result becomes a continuous range", []() {
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CharacterSet set({ {'a', 'd'}, {'f', 'z'} });
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set.add_set(CharacterSet({ {'c', 'g'} }));
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AssertThat(set, Equals(CharacterSet({ {'a', 'z'} })));
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});
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it("does nothing for the set of all characters", [&]() {
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CharacterSet set({ 'a' });
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set.add_set(set.complement());
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AssertThat(set, Equals(CharacterSet({ {'\0', max_char} })));
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});
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});
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describe("computing differences", []() {
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it("works for disjoint sets", []() {
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CharacterSet set1({ {'a', 'z'} });
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set1.remove_set(CharacterSet({ {'A', 'Z'} }));
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AssertThat(set1, Equals(CharacterSet({ {'a', 'z'} })));
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});
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it("works when one set spans the other", []() {
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CharacterSet set1({ {'a','z'} });
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set1.remove_set(CharacterSet({ {'d', 's'} }));
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AssertThat(set1, Equals(CharacterSet({ {'a', 'c'}, {'t', 'z'} })));
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});
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it("works for sets that overlap", []() {
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CharacterSet set1({ {'a','s'} });
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set1.remove_set(CharacterSet({ {'m', 'z'} }));
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AssertThat(set1, Equals(CharacterSet({ {'a', 'l'} })));
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CharacterSet set2({ {'m','z'} });
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set2.remove_set(CharacterSet({ {'a', 's'} }));
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AssertThat(set2, Equals(CharacterSet({ {'t', 'z'} })));
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});
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it("works for sets with multiple ranges", []() {
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CharacterSet set1({ {'a', 'd'}, {'m', 'z'} });
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set1.remove_set(CharacterSet({ {'c', 'o'}, {'s', 'x'} }));
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AssertThat(set1, Equals(CharacterSet({ {'a', 'b'}, {'p', 'r'}, {'y', 'z'} })));
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});
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});
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describe("computing intersections", []() {
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it("returns an empty set for disjoint sets", []() {
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CharacterSet set1({ {'a', 'd'} });
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CharacterSet set2({ {'e', 'x'} });
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AssertThat(set1.intersect(set2), Equals(CharacterSet()));
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});
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it("works for sets with a single overlapping range", []() {
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CharacterSet set1({ {'a', 'e'} });
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CharacterSet set2({ {'c', 'x'} });
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AssertThat(set1.intersect(set2), Equals(CharacterSet({ {'c', 'e'} })));
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});
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it("works for sets with two overlapping ranges", []() {
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CharacterSet set1({ {'a', 'e'}, {'w', 'z'} });
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CharacterSet set2({ {'c', 'y'} });
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AssertThat(set1.intersect(set2), Equals(CharacterSet({ {'c', 'e'}, {'w', 'y'} })));
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});
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});
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});
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END_TEST
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