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clean up the test a little bit... I was getting confused.

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greg
2020-10-18 11:23:57 -04:00
parent c32372b342
commit 1bacb6782f
1 changed files with 14 additions and 9 deletions
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tests/parallel_hash_map_test.cc
+14 -9
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@@ -28,31 +28,36 @@ TEST(THIS_TEST_NAME, ThreadSafeContains) {
EXPECT_TRUE(m.modify_if(2, set_value));
EXPECT_EQ(m[2], 11);
EXPECT_FALSE(m.modify_if(3, set_value));
EXPECT_FALSE(m.modify_if(3, set_value)); // because m[3] does not exist
// overwrite an existing value
m.try_emplace_l(2, [](int& v) { v = 5; });
EXPECT_EQ(m[2], 5);
// insert a value that is not already present. Will be default initialised to 0 and lambda not called
m.try_emplace_l(3, [](int& v) { assert(v == 0); /* should not be called when value constructed */ v = 6; });
EXPECT_EQ(m[3], 0);
m.try_emplace_l(3,
[](int& v) { v = 6; }, // called only when key was already present
1); // argument to construct new value is key not present
EXPECT_EQ(m[3], 1);
// insert a value that is not already present, provide argument to value-construct it
m.try_emplace_l(4, [](int& ) { assert(0); /* should not be called when value constructed */ }, 999);
m.try_emplace_l(4,
[](int& ) {}, // called only when key was already present
999); // argument to construct new value is key not present
EXPECT_EQ(m[4], 999);
// insert a value that is not already present.
// right now m[5] does not exist
m.lazy_emplace_l(5,
[](int& v) { assert(0); /* should not be called when value constructed */ v = 6; },
[](const Map::constructor& ctor) { ctor(5, 13); });
[](int& v) { v = 6; }, // called only when key was already present
[](const Map::constructor& ctor) { ctor(5, 13); }); // construct value_type in place when key not present
EXPECT_EQ(m[5], 13);
// change a value that is present
// change a value that is present. Currently m[5] == 13
m.lazy_emplace_l(5,
[](int& v) { v = 6; },
[](const Map::constructor& ctor) { assert(0); /* should not be called when value exists */ctor(5, 13); });
[](int& v) { v = 6; }, // called only when key was already present
[](const Map::constructor& ctor) { ctor(5, 13); }); // construct value_type in place when key not present
EXPECT_EQ(m[5], 6);
}