f7f37035c8
Today, with the tests inside a `tests` intermingled with the
corresponding library's source code, we have a few problems:
- We have to be careful that wildcards don't end up with tests being
built as part of Nix proper, or test headers being installed as part
of Nix proper.
- Tests in libraries but not executables is not right:
- It means each executable runs the previous unit tests again, because
it needs the libraries.
- It doesn't work right on Windows, which doesn't want you to load a
DLL just for the side global variable . It could be made to work
with the dlopen equivalent, but that's gross!
This reorg solves these problems.
There is a remaining problem which is that sibbling headers (like
`hash.hh` the test header vs `hash.hh` the main `libnixutil` header) end
up shadowing each other. This PR doesn't solve that. That is left as
future work for a future PR.
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
(cherry picked from commit 91b6833686a6a6d9eac7f3f66393ec89ef1d3b57)
(cherry picked from commit a61e42adb528b3d40ce43e07c79368d779a8b624)
131 lines
4 KiB
C++
131 lines
4 KiB
C++
#include "lru-cache.hh"
|
|
#include <gtest/gtest.h>
|
|
|
|
namespace nix {
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* size
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(LRUCache, sizeOfEmptyCacheIsZero) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
ASSERT_EQ(c.size(), 0);
|
|
}
|
|
|
|
TEST(LRUCache, sizeOfSingleElementCacheIsOne) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("foo", "bar");
|
|
ASSERT_EQ(c.size(), 1);
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* upsert / get
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(LRUCache, getFromEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
auto val = c.get("x");
|
|
ASSERT_EQ(val.has_value(), false);
|
|
}
|
|
|
|
TEST(LRUCache, getExistingValue) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("foo", "bar");
|
|
auto val = c.get("foo");
|
|
ASSERT_EQ(val, "bar");
|
|
}
|
|
|
|
TEST(LRUCache, getNonExistingValueFromNonEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("foo", "bar");
|
|
auto val = c.get("another");
|
|
ASSERT_EQ(val.has_value(), false);
|
|
}
|
|
|
|
TEST(LRUCache, upsertOnZeroCapacityCache) {
|
|
LRUCache<std::string, std::string> c(0);
|
|
c.upsert("foo", "bar");
|
|
auto val = c.get("foo");
|
|
ASSERT_EQ(val.has_value(), false);
|
|
}
|
|
|
|
TEST(LRUCache, updateExistingValue) {
|
|
LRUCache<std::string, std::string> c(1);
|
|
c.upsert("foo", "bar");
|
|
|
|
auto val = c.get("foo");
|
|
ASSERT_EQ(val.value_or("error"), "bar");
|
|
ASSERT_EQ(c.size(), 1);
|
|
|
|
c.upsert("foo", "changed");
|
|
val = c.get("foo");
|
|
ASSERT_EQ(val.value_or("error"), "changed");
|
|
ASSERT_EQ(c.size(), 1);
|
|
}
|
|
|
|
TEST(LRUCache, overwriteOldestWhenCapacityIsReached) {
|
|
LRUCache<std::string, std::string> c(3);
|
|
c.upsert("one", "eins");
|
|
c.upsert("two", "zwei");
|
|
c.upsert("three", "drei");
|
|
|
|
ASSERT_EQ(c.size(), 3);
|
|
ASSERT_EQ(c.get("one").value_or("error"), "eins");
|
|
|
|
// exceed capacity
|
|
c.upsert("another", "whatever");
|
|
|
|
ASSERT_EQ(c.size(), 3);
|
|
// Retrieving "one" makes it the most recent element thus
|
|
// two will be the oldest one and thus replaced.
|
|
ASSERT_EQ(c.get("two").has_value(), false);
|
|
ASSERT_EQ(c.get("another").value(), "whatever");
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* clear
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(LRUCache, clearEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.clear();
|
|
ASSERT_EQ(c.size(), 0);
|
|
}
|
|
|
|
TEST(LRUCache, clearNonEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("one", "eins");
|
|
c.upsert("two", "zwei");
|
|
c.upsert("three", "drei");
|
|
ASSERT_EQ(c.size(), 3);
|
|
c.clear();
|
|
ASSERT_EQ(c.size(), 0);
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* erase
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(LRUCache, eraseFromEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
ASSERT_EQ(c.erase("foo"), false);
|
|
ASSERT_EQ(c.size(), 0);
|
|
}
|
|
|
|
TEST(LRUCache, eraseMissingFromNonEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("one", "eins");
|
|
ASSERT_EQ(c.erase("foo"), false);
|
|
ASSERT_EQ(c.size(), 1);
|
|
ASSERT_EQ(c.get("one").value_or("error"), "eins");
|
|
}
|
|
|
|
TEST(LRUCache, eraseFromNonEmptyCache) {
|
|
LRUCache<std::string, std::string> c(10);
|
|
c.upsert("one", "eins");
|
|
ASSERT_EQ(c.erase("one"), true);
|
|
ASSERT_EQ(c.size(), 0);
|
|
ASSERT_EQ(c.get("one").value_or("empty"), "empty");
|
|
}
|
|
}
|