53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#include "spec_helper.h"
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#include "compiler/rules/choice.h"
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#include "helpers/rule_helpers.h"
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#include "helpers/equals_pointer.h"
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using namespace rules;
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START_TEST
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describe("Choice", []() {
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describe("constructing choices", [&]() {
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it("eliminates duplicate members", [&]() {
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auto rule = Choice::build({
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seq({ sym("one"), sym("two") }),
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sym("three"),
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seq({ sym("one"), sym("two") })
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});
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AssertThat(rule, EqualsPointer(choice({
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seq({ sym("one"), sym("two") }),
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sym("three"),
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})));
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});
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it("eliminates duplicates within nested choices", [&]() {
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auto rule = Choice::build({
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seq({ sym("one"), sym("two") }),
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Choice::build({
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sym("three"),
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seq({ sym("one"), sym("two") })
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})
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});
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AssertThat(rule, EqualsPointer(choice({
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seq({ sym("one"), sym("two") }),
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sym("three"),
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})));
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});
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it("doesn't construct a choice if there's only one unique member", [&]() {
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auto rule = Choice::build({
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sym("one"),
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Choice::build({
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sym("one"),
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})
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});
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AssertThat(rule, EqualsPointer(sym("one")));
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});
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});
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});
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END_TEST
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