unikernel/duniverse/dune_/test/blackbox-tests/test-cases/pkg/dependency-hash.t

@@ -0,0 +1,173 @@
+Tests for the `dune describe pkg dependency-hash` command.
+
+The case where there are no local packages:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > EOF
+  $ dune describe pkg dependency-hash
+  Error: No non-local dependencies
+  [1]
+
+The case where there are local packages but no dependencies:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package (name a))
+  > (package (name b))
+  > EOF
+  $ dune describe pkg dependency-hash
+  Error: No non-local dependencies
+  [1]
+
+The case where there are local packages with dependencies but no non-local
+dependencies:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package (name a))
+  > (package
+  >  (name b)
+  >  (depends a))
+  > EOF
+  $ dune describe pkg dependency-hash
+  Error: No non-local dependencies
+  [1]
+
+A single package with a single non-local dependency:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package
+  >  (name a)
+  >  (depends
+  >   foo))
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash1.txt
+  36e640fbcda71963e7e2f689f6c96c3e
+
+Adding another dependency causes the hash to change:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package
+  >  (name a)
+  >  (depends
+  >   foo
+  >   bar))
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash2.txt
+  b6404e14c268884f825aa1fb7d1b4ead
+  $ diff hash1.txt hash2.txt
+  1c1
+  < 36e640fbcda71963e7e2f689f6c96c3e
+  ---
+  > b6404e14c268884f825aa1fb7d1b4ead
+  [1]
+
+Adding a new local package which depends on one of the existing dependencies
+changes the hash:
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package
+  >  (name a)
+  >  (depends
+  >   foo
+  >   bar))
+  > (package
+  >  (name b)
+  >  (depends
+  >   foo))
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash3.txt
+  fa35416284004d71ff802a4c582f8797
+  $ diff hash2.txt hash3.txt
+  1c1
+  < b6404e14c268884f825aa1fb7d1b4ead
+  ---
+  > fa35416284004d71ff802a4c582f8797
+  [1]
+
+Adding a constraint to one of the dependencies causes the hash to change:
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package
+  >  (name a)
+  >  (depends
+  >   foo
+  >   bar))
+  > (package
+  >  (name b)
+  >  (depends
+  >   (foo (and :with-test (> 0.1)))))
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash4.txt
+  fdf713b190b56d52d8cdbdd72a382654
+  $ diff hash3.txt hash4.txt
+  1c1
+  < fa35416284004d71ff802a4c582f8797
+  ---
+  > fdf713b190b56d52d8cdbdd72a382654
+  [1]
+
+Adding another local package with the same dependency and constraint changes
+the hash:
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.11)
+  > (package
+  >  (name a)
+  >  (depends
+  >   foo
+  >   bar))
+  > (package
+  >  (name b)
+  >  (depends
+  >   (foo (and :with-test (> 0.1)))))
+  > (package
+  >  (name c)
+  >  (depends
+  >   (foo (and :with-test (> 0.1)))))
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash5.txt
+  38fa247158bdf36939ec8b10b3205508
+  $ diff hash4.txt hash5.txt
+  1c1
+  < fdf713b190b56d52d8cdbdd72a382654
+  ---
+  > 38fa247158bdf36939ec8b10b3205508
+  [1]
+
+Make sure that the hash changes when the formula changes from a conjunction to
+a disjunction, thus changing the solution:
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.11)
+  > EOF
+  $ cat > local.opam <<EOF
+  > opam-version: "2.0"
+  > depends: [ "a" "b" ]
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash-a-b.txt
+  d18946fdd9833ae312d309f654f11c1b
+  $ cat > local.opam <<EOF
+  > opam-version: "2.0"
+  > depends: [ "a" | "b" ]
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash-a-or-b.txt
+  5b2db8d296a969fbd80033f70919b2ec
+  $ diff hash-a-and-b.txt hash-a-or-b.txt
+  diff: hash-a-and-b.txt: No such file or directory
+  [2]
+
+The formula also changes if the dependencies being picked end up being the same
+("a" and "b") but the formula changed by including another dependency:
+
+  $ cat > local.opam <<EOF
+  > opam-version: "2.0"
+  > depends: [ "a" & ("b" | "c") ]
+  > EOF
+  $ dune describe pkg dependency-hash | tee hash-a-b-or-c.txt
+  b704ac23e0d16a5e7a1b10aa6a8cbe0e
+  $ diff hash-a-b.txt hash-a-b-or-c.txt
+  1c1
+  < d18946fdd9833ae312d309f654f11c1b
+  ---
+  > b704ac23e0d16a5e7a1b10aa6a8cbe0e
+  [1]