10 files changed, 102 insertions, 3 deletions
diff --git a/tests/build-dry.sh b/tests/build-dry.sh
new file mode 100644
index 000000000000..610e6070c5d7
--- /dev/null
+++ b/tests/build-dry.sh
@@ -0,0 +1,52 @@
+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"
+
+# TODO: XXX: FIXME: #1793
+# Disable this part of the test until the problem is resolved:
+if [ -n "$ISSUE_1795_IS_FIXED" ]; then
+clearStore
+clearCache
+
+# Try --dry-run using new command first
+nix build -f dependencies.nix --dry-run 2>&1 | grep "will be built"
+# Now old command:
+nix-build dependencies.nix --dry-run 2>&1 | grep "will be built"
+fi
+
+###################################################
+# Check --dry-run doesn't create links with --dry-run
+# https://github.com/NixOS/nix/issues/1849
+clearStore
+clearCache
+
+RESULT=$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 $RESULT ]]
diff --git a/tests/init.sh b/tests/init.sh
index 41cca047d8fb..e5353598bcc4 100644
--- a/tests/init.sh
+++ b/tests/init.sh
@@ -16,7 +16,12 @@ mkdir "$NIX_CONF_DIR"
 cat > "$NIX_CONF_DIR"/nix.conf <<EOF
 build-users-group =
 keep-derivations = false
+include nix.conf.extra
+EOF
+
+cat > "$NIX_CONF_DIR"/nix.conf.extra <<EOF
 fsync-metadata = false
+!include nix.conf.extra.not-there
 EOF
 
 # Initialise the database.
diff --git a/tests/lang/eval-okay-replacestrings.exp b/tests/lang/eval-okay-replacestrings.exp
index a2add1b7b140..72e8274d8c58 100644
--- a/tests/lang/eval-okay-replacestrings.exp
+++ b/tests/lang/eval-okay-replacestrings.exp
@@ -1 +1 @@
-[ "faabar" "fbar" "fubar" "faboor" "fubar" ]
+[ "faabar" "fbar" "fubar" "faboor" "fubar" "XaXbXcX" "X" "a_b" ]
diff --git a/tests/lang/eval-okay-replacestrings.nix b/tests/lang/eval-okay-replacestrings.nix
index 6284a0e660ae..bd8031fc004e 100644
--- a/tests/lang/eval-okay-replacestrings.nix
+++ b/tests/lang/eval-okay-replacestrings.nix
@@ -5,4 +5,7 @@ with builtins;
   (replaceStrings ["oo"] ["u"] "foobar")
   (replaceStrings ["oo" "a"] ["a" "oo"] "foobar")
   (replaceStrings ["oo" "oo"] ["u" "i"] "foobar")
+  (replaceStrings [""] ["X"] "abc")
+  (replaceStrings [""] ["X"] "")
+  (replaceStrings ["-"] ["_"] "a-b")
 ]
diff --git a/tests/lang/eval-okay-splitversion.exp b/tests/lang/eval-okay-splitversion.exp
new file mode 100644
index 000000000000..153ceb8186a0
--- /dev/null
+++ b/tests/lang/eval-okay-splitversion.exp
@@ -0,0 +1 @@
+[ "1" "2" "3" ]
diff --git a/tests/lang/eval-okay-splitversion.nix b/tests/lang/eval-okay-splitversion.nix
new file mode 100644
index 000000000000..9e5c99d2e7f6
--- /dev/null
+++ b/tests/lang/eval-okay-splitversion.nix
@@ -0,0 +1 @@
+builtins.splitVersion "1.2.3"
diff --git a/tests/local.mk b/tests/local.mk
index e90b9f7da4ad..ec7ebfb0dedc 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 \
@@ -22,7 +23,8 @@ nix_tests = \
   run.sh \
   brotli.sh \
   pure-eval.sh \
-  check.sh
+  check.sh \
+  plugins.sh
   # parallel.sh
 
 install-tests += $(foreach x, $(nix_tests), tests/$(x))
@@ -31,4 +33,4 @@ tests-environment = NIX_REMOTE= $(bash) -e
 
 clean-files += $(d)/common.sh
 
-installcheck: $(d)/common.sh
+installcheck: $(d)/common.sh $(d)/plugins/libplugintest.$(SO_EXT)
diff --git a/tests/plugins.sh b/tests/plugins.sh
new file mode 100644
index 000000000000..4b1baeddce32
--- /dev/null
+++ b/tests/plugins.sh
@@ -0,0 +1,7 @@
+source common.sh
+
+set -o pipefail
+
+res=$(nix eval '(builtins.anotherNull)' --option setting-set true --option plugin-files $PWD/plugins/libplugintest*)
+
+[ "$res"x = "nullx" ]
diff --git a/tests/plugins/local.mk b/tests/plugins/local.mk
new file mode 100644
index 000000000000..1d2bac052fd2
--- /dev/null
+++ b/tests/plugins/local.mk
@@ -0,0 +1,9 @@
+libraries += libplugintest
+
+libplugintest_DIR := $(d)
+
+libplugintest_SOURCES := $(d)/plugintest.cc
+
+libplugintest_ALLOW_UNDEFINED := 1
+
+libplugintest_EXCLUDE_FROM_LIBRARY_LIST := 1
diff --git a/tests/plugins/plugintest.cc b/tests/plugins/plugintest.cc
new file mode 100644
index 000000000000..8da15ebabd7d
--- /dev/null
+++ b/tests/plugins/plugintest.cc
@@ -0,0 +1,19 @@
+#include "globals.hh"
+#include "primops.hh"
+
+using namespace nix;
+
+static BaseSetting<bool> settingSet{false, "setting-set",
+        "Whether the plugin-defined setting was set"};
+
+static RegisterSetting rs(&settingSet);
+
+static void prim_anotherNull (EvalState & state, const Pos & pos, Value ** args, Value & v)
+{
+    if (settingSet)
+        mkNull(v);
+    else
+        mkBool(v, false);
+}
+
+static RegisterPrimOp rp("anotherNull", 0, prim_anotherNull);