1 files changed, 18 insertions, 0 deletions
diff --git a/yarn.tests/env.script b/yarn.tests/env.script
new file mode 100755
index 0000000..2ef35c6
--- /dev/null
+++ b/yarn.tests/env.script
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -eu
+
+cat << 'EOF' > "$DATADIR/env.yarn"
+    SCENARIO check environment
+    THEN DATADIR is set
+    AND SRCDIR is set
+    AND NOTSET is not set
+
+    IMPLEMENTS THEN (\S+) is set
+    env | grep "^$MATCH_1="
+
+    IMPLEMENTS THEN (\S+) is not set
+    ! env | grep "^$MATCH_1="
+EOF
+
+NOTSET=foo ./run-yarn "$DATADIR/env.yarn"