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-rw-r--r--tests/derivations.scm38
1 files changed, 38 insertions, 0 deletions
diff --git a/tests/derivations.scm b/tests/derivations.scm
index 061a9bd42b..119edfcb86 100644
--- a/tests/derivations.scm
+++ b/tests/derivations.scm
@@ -353,6 +353,44 @@
;; built.
(null? (derivation-prerequisites-to-build %store drv))))
+(test-assert "derivation-prerequisites-to-build when outputs already present"
+ (let*-values (((builder)
+ '(begin (mkdir %output) #t))
+ ((input-drv-path input-drv)
+ (build-expression->derivation %store "input"
+ (%current-system)
+ builder '()))
+ ((input-path)
+ (derivation-output-path
+ (assoc-ref (derivation-outputs input-drv)
+ "out")))
+ ((drv-path drv)
+ (build-expression->derivation %store "something"
+ (%current-system)
+ builder
+ `(("i" ,input-drv-path))))
+ ((output)
+ (derivation-output-path
+ (assoc-ref (derivation-outputs drv) "out"))))
+ ;; Make sure these things are not already built.
+ (when (valid-path? %store input-path)
+ (delete-paths %store (list input-path)))
+ (when (valid-path? %store output)
+ (delete-paths %store (list output)))
+
+ (and (equal? (map derivation-input-path
+ (derivation-prerequisites-to-build %store drv))
+ (list input-drv-path))
+
+ ;; Build DRV and delete its input.
+ (build-derivations %store (list drv-path))
+ (delete-paths %store (list input-path))
+ (not (valid-path? %store input-path))
+
+ ;; Now INPUT-PATH is missing, yet it shouldn't be listed as a
+ ;; prerequisite to build because DRV itself is already built.
+ (null? (derivation-prerequisites-to-build %store drv)))))
+
(test-assert "build-expression->derivation with expression returning #f"
(let* ((builder '(begin
(mkdir %output)