From 0f65793f94bd89c973482ac949be1e96e876762b Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 23 Jul 2012 17:40:23 -0400
Subject: [PATCH] Add a test for Nix store optimisation

---
 tests/Makefile.am       |  2 +-
 tests/optimise-store.sh | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 tests/optimise-store.sh

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 517c382b1..a562db52b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -9,7 +9,7 @@ TESTS = init.sh hash.sh lang.sh add.sh simple.sh dependencies.sh \
   gc-runtime.sh install-package.sh check-refs.sh filter-source.sh \
   remote-store.sh export.sh export-graph.sh negative-caching.sh \
   binary-patching.sh timeout.sh secure-drv-outputs.sh nix-channel.sh \
-  multiple-outputs.sh import-derivation.sh fetchurl.sh
+  multiple-outputs.sh import-derivation.sh fetchurl.sh optimise-store.sh
 
 XFAIL_TESTS =
 
diff --git a/tests/optimise-store.sh b/tests/optimise-store.sh
new file mode 100644
index 000000000..4d8077997
--- /dev/null
+++ b/tests/optimise-store.sh
@@ -0,0 +1,26 @@
+source common.sh
+
+clearStore
+
+outPath1=$(echo 'with import ./config.nix; mkDerivation { name = "foo1"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link)
+outPath2=$(echo 'with import ./config.nix; mkDerivation { name = "foo2"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link)
+
+inode1="$(perl -e "print ((lstat('$outPath1/foo'))[1])")"
+inode2="$(perl -e "print ((lstat('$outPath2/foo'))[1])")"
+if [ "$inode1" != "$inode2" ]; then
+    echo "inodes do not match"
+    exit 1
+fi
+
+nlink="$(perl -e "print ((lstat('$outPath1/foo'))[3])")"
+if [ "$nlink" != 3 ]; then
+    echo "link count incorrect"
+    exit 1
+fi
+
+nix-store --gc
+
+if [ -n "$(ls $NIX_STORE_DIR/.links)" ]; then
+    echo ".links directory not empty after GC"
+    exit 1
+fi