5 files changed, 56 insertions, 0 deletions
diff --git a/third_party/bazel/rules_haskell/tests/hidden-modules/BUILD.bazel b/third_party/bazel/rules_haskell/tests/hidden-modules/BUILD.bazel
new file mode 100644
index 000000000000..5d79e56085a2
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/hidden-modules/BUILD.bazel
@@ -0,0 +1,35 @@
+load(
+    "@io_tweag_rules_haskell//haskell:haskell.bzl",
+    "haskell_library",
+)
+
+package(
+    default_testonly = 1,
+    default_visibility = ["//visibility:public"],
+)
+
+haskell_library(
+    name = "lib-a",
+    srcs = glob(["lib-a/*.hs"]),
+    hidden_modules = ["Foo"],
+    src_strip_prefix = "lib-a",
+    deps = ["//tests/hackage:base"],
+)
+
+haskell_library(
+    name = "lib-b",
+    srcs = glob(["lib-b/*.hs"]),
+    src_strip_prefix = "lib-b",
+    deps = ["//tests/hackage:base"],
+)
+
+haskell_library(
+    name = "lib-c",
+    srcs = glob(["lib-c/*.hs"]),
+    src_strip_prefix = "lib-c",
+    deps = [
+        ":lib-a",
+        ":lib-b",
+        "//tests/hackage:base",
+    ],
+)
diff --git a/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Bar.hs b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Bar.hs
new file mode 100644
index 000000000000..5bc9c68895bf
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Bar.hs
@@ -0,0 +1,6 @@
+module Bar (bar) where
+
+import Foo (foo)
+
+bar :: Int
+bar = foo * 2
diff --git a/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Foo.hs b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Foo.hs
new file mode 100644
index 000000000000..664be00d5487
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-a/Foo.hs
@@ -0,0 +1,4 @@
+module Foo (foo) where
+
+foo :: Int
+foo = 15
diff --git a/third_party/bazel/rules_haskell/tests/hidden-modules/lib-b/Foo.hs b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-b/Foo.hs
new file mode 100644
index 000000000000..6fdd42f9a8cd
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-b/Foo.hs
@@ -0,0 +1,4 @@
+module Foo (foo) where
+
+foo :: Int
+foo = 16
diff --git a/third_party/bazel/rules_haskell/tests/hidden-modules/lib-c/Baz.hs b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-c/Baz.hs
new file mode 100644
index 000000000000..055b2e80ad79
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/hidden-modules/lib-c/Baz.hs
@@ -0,0 +1,7 @@
+module Baz (bar) where
+
+import Foo (foo)
+import Bar (bar)
+
+baz :: Int
+baz = foo + bar