#!/bin/sh

test_description='git rev-list trivial path optimization test'

. ./test-lib.sh

test_expect_success setup '
echo Hello > a &&
git add a &&
git commit -m "Initial commit" a &&
initial=$(git rev-parse --verify HEAD)
'

test_expect_success path-optimization '
    commit=$(echo "Unchanged tree" | git commit-tree "HEAD^{tree}" -p HEAD) &&
    test $(git rev-list $commit | wc -l) = 2 &&
    test $(git rev-list $commit -- . | wc -l) = 1
'

test_expect_success 'further setup' '
        git checkout -b side &&
        echo Irrelevant >c &&
        git add c &&
        git commit -m "Side makes an irrelevant commit" &&
        echo "More Irrelevancy" >c &&
        git add c &&
        git commit -m "Side makes another irrelevant commit" &&
        echo Bye >a &&
        git add a &&
        git commit -m "Side touches a" &&
        side=$(git rev-parse --verify HEAD) &&
        echo "Yet more Irrelevancy" >c &&
        git add c &&
        git commit -m "Side makes yet another irrelevant commit" &&
        git checkout master &&
        echo Another >b &&
        git add b &&
        git commit -m "Master touches b" &&
        git merge side &&
        echo Touched >b &&
        git add b &&
        git commit -m "Master touches b again"
'

test_expect_success 'path optimization 2' '
        ( echo "$side"; echo "$initial" ) >expected &&
        git rev-list HEAD -- a >actual &&
        diff -u expected actual
'

test_done