1 files changed, 70 insertions, 0 deletions
diff --git a/third_party/nix/tests/gc-auto.sh b/third_party/nix/tests/gc-auto.sh
new file mode 100644
index 000000000000..de1e2cfe4059
--- /dev/null
+++ b/third_party/nix/tests/gc-auto.sh
@@ -0,0 +1,70 @@
+source common.sh
+
+clearStore
+
+garbage1=$(nix add-to-store --name garbage1 ./nar-access.sh)
+garbage2=$(nix add-to-store --name garbage2 ./nar-access.sh)
+garbage3=$(nix add-to-store --name garbage3 ./nar-access.sh)
+
+ls -l $garbage3
+POSIXLY_CORRECT=1 du $garbage3
+
+fake_free=$TEST_ROOT/fake-free
+export _NIX_TEST_FREE_SPACE_FILE=$fake_free
+echo 1100 > $fake_free
+
+expr=$(cat <<EOF
+with import ./config.nix; mkDerivation {
+  name = "gc-A";
+  buildCommand = ''
+    set -x
+    [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 3 ]]
+    mkdir \$out
+    echo foo > \$out/bar
+    echo 1...
+    sleep 2
+    echo 200 > ${fake_free}.tmp1
+    mv ${fake_free}.tmp1 $fake_free
+    echo 2...
+    sleep 2
+    echo 3...
+    sleep 2
+    echo 4...
+    [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]
+  '';
+}
+EOF
+)
+
+expr2=$(cat <<EOF
+with import ./config.nix; mkDerivation {
+  name = "gc-B";
+  buildCommand = ''
+    set -x
+    mkdir \$out
+    echo foo > \$out/bar
+    echo 1...
+    sleep 2
+    echo 200 > ${fake_free}.tmp2
+    mv ${fake_free}.tmp2 $fake_free
+    echo 2...
+    sleep 2
+    echo 3...
+    sleep 2
+    echo 4...
+  '';
+}
+EOF
+)
+
+nix build -v -o $TEST_ROOT/result-A -L "($expr)" \
+    --min-free 1000 --max-free 2000 --min-free-check-interval 1 &
+pid=$!
+
+nix build -v -o $TEST_ROOT/result-B -L "($expr2)" \
+    --min-free 1000 --max-free 2000 --min-free-check-interval 1
+
+wait "$pid"
+
+[[ foo = $(cat $TEST_ROOT/result-A/bar) ]]
+[[ foo = $(cat $TEST_ROOT/result-B/bar) ]]