From 3780435a0e3166ff898b33b8eb9a057ffa16ce67 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Wed, 7 Feb 2018 14:57:44 -0600
Subject: [PATCH] tests: Add (failing) tests for reported --dry-run issues.

---
 tests/build-dry.sh | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/local.mk     |  1 +
 2 files changed, 50 insertions(+)
 create mode 100644 tests/build-dry.sh

diff --git a/tests/build-dry.sh b/tests/build-dry.sh
new file mode 100644
index 000000000..9a2a70d5f
--- /dev/null
+++ b/tests/build-dry.sh
@@ -0,0 +1,49 @@
+source common.sh
+
+###################################################
+# Check that --dry-run isn't confused with read-only mode
+# https://github.com/NixOS/nix/issues/1795
+
+clearStore
+clearCache
+
+# Ensure this builds successfully first
+nix build -f dependencies.nix
+
+clearStore
+clearCache
+
+# Try --dry-run using old command first
+nix-build dependencies.nix --dry-run 2>&1 | grep "will be built"
+# Now new command:
+nix build -f dependencies.nix --dry-run 2>&1 | grep "will be built"
+
+clearStore
+clearCache
+
+# Try --dry-run using new command first
+nix build -f dependencies.nix --dry-run 2>&1 | grep "will be built"
+# Now old command:
+nix-build dependencies.nix --dry-run 2>&1 | grep "will be built"
+
+
+###################################################
+# Check --dry-run doesn't create links with --dry-run
+# https://github.com/NixOS/nix/issues/1849
+clearStore
+clearCache
+
+RESULT=$TEST_ROOT/result-link
+rm -f $RESULT
+
+nix-build dependencies.nix -o $RESULT --dry-run
+
+[[ ! -h $RESULT ]] || fail "nix-build --dry-run created output link"
+
+nix build -f dependencies.nix -o $RESULT --dry-run
+
+[[ ! -h $RESULT ]] || fail "nix build --dry-run created output link"
+
+nix build -f dependencies.nix -o $RESULT
+
+[[ -h $RESULT ]]
diff --git a/tests/local.mk b/tests/local.mk
index e90b9f7da..0035dca2d 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -13,6 +13,7 @@ nix_tests = \
   check-reqs.sh pass-as-file.sh tarball.sh restricted.sh \
   placeholders.sh nix-shell.sh \
   linux-sandbox.sh \
+  build-dry.sh \
   build-remote.sh \
   nar-access.sh \
   structured-attrs.sh \