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# shellcheck shell=bash
# Asserts that two arrays are equal, printing out differences if they are not.
# Does not short circuit on the first difference.
assertEqualArray() {
if (($# != 2)); then
nixErrorLog "expected two arguments!"
nixErrorLog "usage: assertEqualArray expectedArrayRef actualArrayRef"
exit 1
fi
local -nr expectedArrayRef="$1"
local -nr actualArrayRef="$2"
if ! isDeclaredArray "${!expectedArrayRef}"; then
nixErrorLog "first argument expectedArrayRef must be a reference to an indexed array"
exit 1
fi
if ! isDeclaredArray "${!actualArrayRef}"; then
nixErrorLog "second argument actualArrayRef must be a reference to an indexed array"
exit 1
fi
local -ir expectedLength=${#expectedArrayRef[@]}
local -ir actualLength=${#actualArrayRef[@]}
local -i hasDiff=0
if ((expectedLength != actualLength)); then
nixErrorLog "arrays differ in length: expectedArray has length $expectedLength but actualArray has length $actualLength"
hasDiff=1
fi
local -i idx=0
local expectedValue
local actualValue
# We iterate so long as at least one array has indices we've not considered.
# This means that `idx` is a valid index to *at least one* of the arrays.
for ((idx = 0; idx < expectedLength || idx < actualLength; idx++)); do
# Update values for variables which are still in range/valid.
if ((idx < expectedLength)); then
expectedValue="${expectedArrayRef[idx]}"
fi
if ((idx < actualLength)); then
actualValue="${actualArrayRef[idx]}"
fi
# Handle comparisons.
if ((idx >= expectedLength)); then
nixErrorLog "arrays differ at index $idx: expectedArray has no such index but actualArray has value ${actualValue@Q}"
hasDiff=1
elif ((idx >= actualLength)); then
nixErrorLog "arrays differ at index $idx: expectedArray has value ${expectedValue@Q} but actualArray has no such index"
hasDiff=1
elif [[ $expectedValue != "$actualValue" ]]; then
nixErrorLog "arrays differ at index $idx: expectedArray has value ${expectedValue@Q} but actualArray has value ${actualValue@Q}"
hasDiff=1
fi
done
((hasDiff)) && exit 1 || return 0
}
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