#!/bin/sh

die () { echo "$@" ; exit 1; }

export NVM_DIR="$(cd ../../.. && pwd)"

: nvm.sh
\. "${NVM_DIR}/nvm.sh"

# 1-hop self-reference: alias points to itself
echo 'self' > '../../../alias/self'

ACTUAL="$(nvm_resolve_alias self)"
EXPECTED='∞'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}< for self-reference, got >${ACTUAL}<"

rm -f '../../../alias/self'

# Multi-hop loop: link1 -> link2 -> link3 -> link1
echo 'link2' > '../../../alias/link1'
echo 'link3' > '../../../alias/link2'
echo 'link1' > '../../../alias/link3'

ACTUAL="$(nvm_resolve_alias link1)"
EXPECTED='∞'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}< for 3-hop cycle, got >${ACTUAL}<"

rm -f '../../../alias/link1' '../../../alias/link2' '../../../alias/link3'

# Cycle through an alias name containing a space
echo 'midway' > '../../../alias/foo bar'
echo 'foo bar' > '../../../alias/midway'

ACTUAL="$(nvm_resolve_alias 'foo bar')"
EXPECTED='∞'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}< for space-name cycle, got >${ACTUAL}<"

rm -f '../../../alias/foo bar' '../../../alias/midway'

# Non-cycle through an alias name containing a space.
# Token-based cycle detection would false-positive on this chain because
# 'bar' appears as a substring of the multi-token alias name 'foo bar'.
# Resolves: 'foo bar' -> 'midway' -> 'bar' -> 0.0.99
echo 'midway' > '../../../alias/foo bar'
echo 'bar' > '../../../alias/midway'
echo '0.0.99' > '../../../alias/bar'

ACTUAL="$(nvm_resolve_alias 'foo bar')"
EXPECTED='v0.0.99'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}< for space-name chain, got >${ACTUAL}<"

rm -f '../../../alias/foo bar' '../../../alias/midway' '../../../alias/bar'