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rboullard
d239f8942c
Reviewed-on: BigfootDev/flatbuffers-bigfoot#1 Co-authored-by: Romain BOULLARD <romain.boullard@protonmail.com>
40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
#include "required_table_default_test.h"
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#include "required_table_default_test_generated.h"
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#include "test_assert.h"
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namespace flatbuffers {
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namespace tests {
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// Exercises the (required) table-field default member initializer added to
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// GenMember() in idl_gen_cpp.cpp: a `(required)` table field can never
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// legally be missing once Pack()/Verify() succeed, so a plain native default
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// constructor must not leave it null - callers should never have to
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// remember to allocate it themselves before the first Pack(). The sibling
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// `optional_inner` field (same type, no `required`) is checked alongside it
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// to confirm the change is scoped to required fields only.
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void RequiredTableDefaultTest() {
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using RequiredTableDefaultTestNS::Holder;
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using RequiredTableDefaultTestNS::HolderT;
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HolderT src;
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TEST_NOTNULL(src.required_inner.get());
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TEST_NULL(src.optional_inner.get());
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// Never manually allocated required_inner - only relying on the default
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// constructor above - yet Pack() must still succeed and round-trip it.
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src.required_inner->value = 42;
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flatbuffers::FlatBufferBuilder fbb;
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fbb.Finish(Holder::Pack(fbb, &src));
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auto dst = RequiredTableDefaultTestNS::UnPackHolder(fbb.GetBufferPointer());
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TEST_NOTNULL(dst->required_inner.get());
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TEST_EQ(dst->required_inner->value, 42u);
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TEST_NULL(dst->optional_inner.get());
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}
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} // namespace tests
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} // namespace flatbuffers
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