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lib/tests: Add findFirst tests

This commit is contained in:
Silvan Mosberger 2023-05-31 22:50:00 +02:00
parent 28ecd17523
commit 6996f76885

View file

@ -518,6 +518,41 @@ runTests {
expected = false;
};
testFindFirstExample1 = {
expr = findFirst (x: x > 3) 7 [ 1 6 4 ];
expected = 6;
};
testFindFirstExample2 = {
expr = findFirst (x: x > 9) 7 [ 1 6 4 ];
expected = 7;
};
testFindFirstEmpty = {
expr = findFirst (abort "when the list is empty, the predicate is not needed") null [];
expected = null;
};
testFindFirstSingleMatch = {
expr = findFirst (x: x == 5) null [ 5 ];
expected = 5;
};
testFindFirstSingleDefault = {
expr = findFirst (x: false) null [ (abort "if the predicate doesn't access the value, it must not be evaluated") ];
expected = null;
};
testFindFirstNone = {
expr = builtins.tryEval (findFirst (x: x == 2) null [ 1 (throw "the last element must be evaluated when there's no match") ]);
expected = { success = false; value = false; };
};
# Makes sure that the implementation doesn't cause a stack overflow
testFindFirstBig = {
expr = findFirst (x: x == 1000000) null (range 0 1000000);
expected = 1000000;
};
# ATTRSETS