tests/format/junctions.py: Adding tests for internal junctions

82 files changed, 356 insertions, 0 deletions

diff --git a/tests/format/junctions.py b/tests/format/junctions.py
index 2e3900fe1..f5858f7e2 100644
--- a/tests/format/junctions.py
+++ b/tests/format/junctions.py
@@ -510,6 +510,17 @@ def test_override_twice(cli, tmpdir, datafiles):
             "target.bst",
             ["target.bst [line 6 column 2]", "target.bst [line 4 column 2]", "target.bst [line 5 column 2]"],
         ),
+        # Test a project which uses an internal subsubproject, but also uses that same subsubproject twice
+        # at the toplevel, this test ensures we also get the provenance of the internal project in the error.
+        (
+            "internal-and-conflict",
+            "target.bst",
+            [
+                "subproject.bst:subtarget.bst [line 10 column 2]",
+                "target.bst [line 5 column 2]",
+                "target.bst [line 6 column 2]",
+            ],
+        ),
     ],
     ids=[
         "simple",
@@ -520,6 +531,7 @@ def test_override_twice(cli, tmpdir, datafiles):
         "plugin",
         "incomplete-duplicates",
         "incomplete-nested-duplicates",
+        "internal",
     ],
 )
 def test_conflict(cli, tmpdir, datafiles, project_dir, target, provenances):
@@ -645,3 +657,39 @@ def test_duplicates_not_found(cli, tmpdir, datafiles, project_dir, provenance):
 
     # Check that provenance was provided if expected
     assert provenance in result.stderr
+
+
+#
+# Test internal projects
+#
+@pytest.mark.datafiles(DATA_DIR)
+@pytest.mark.parametrize(
+    "project_dir,expected_files",
+    [
+        # Test a project which repeats a subproject which is also
+        # internal to another subproject.
+        ("internal-simple", ["subsub.txt", "subsub-again.txt"]),
+        # Test a project which repeats a subproject which is also
+        # internal to two other subprojects.
+        ("internal-double", ["subsub1.txt", "subsub2.txt", "subsub-again.txt"]),
+        # Test a project which repeats a subproject which is also
+        # internal to another subproject, which marks it internal using a link.
+        ("internal-link", ["subsub.txt", "subsub-again.txt"]),
+        # Test a project which repeats a subproject which is also internal to another
+        # subproject, and also overrides that same internal subproject.
+        ("internal-override", ["subsub-override.txt", "subsub-again.txt"]),
+    ],
+    ids=["simple", "double", "link", "override"],
+)
+def test_internal(cli, tmpdir, datafiles, project_dir, expected_files):
+    project = os.path.join(str(datafiles), project_dir)
+    checkoutdir = os.path.join(str(tmpdir), "checkout")
+
+    result = cli.run(project=project, args=["build", "target.bst"])
+    result.assert_success()
+    result = cli.run(project=project, args=["artifact", "checkout", "target.bst", "--directory", checkoutdir])
+    result.assert_success()
+
+    # Check that the checkout contains the expected file
+    for expected in expected_files:
+        assert os.path.exists(os.path.join(checkoutdir, expected))
diff --git a/tests/format/junctions/internal-and-conflict/project.conf b/tests/format/junctions/internal-and-conflict/project.conf
new file mode 100644
index 000000000..20636c446
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/project.conf
@@ -0,0 +1,2 @@
+name: test
+min-version: 2.0
diff --git a/tests/format/junctions/internal-and-conflict/subproject.bst b/tests/format/junctions/internal-and-conflict/subproject.bst
new file mode 100644
index 000000000..c88189cb0
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject
diff --git a/tests/format/junctions/internal-and-conflict/subproject/project.conf b/tests/format/junctions/internal-and-conflict/subproject/project.conf
new file mode 100644
index 000000000..1d44ec886
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/project.conf
@@ -0,0 +1,6 @@
+name: subtest
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject.bst
diff --git a/tests/format/junctions/internal-and-conflict/subproject/subsubproject.bst b/tests/format/junctions/internal-and-conflict/subproject/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-and-conflict/subproject/subsubproject/project.conf b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-and-conflict/subproject/subsubproject/subsub.txt b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/subsub.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/subsub.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-and-conflict/subproject/subsubproject/target.bst b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/target.bst
new file mode 100644
index 000000000..afafac601
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub.txt
diff --git a/tests/format/junctions/internal-and-conflict/subproject/subtarget.bst b/tests/format/junctions/internal-and-conflict/subproject/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subproject/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-again.bst b/tests/format/junctions/internal-and-conflict/subsubproject-again.bst
new file mode 100644
index 000000000..308642704
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-again.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-again
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-again/project.conf b/tests/format/junctions/internal-and-conflict/subsubproject-again/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-again/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-again/subsub-again.txt b/tests/format/junctions/internal-and-conflict/subsubproject-again/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-again/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-again/target.bst b/tests/format/junctions/internal-and-conflict/subsubproject-again/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-again/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-conflict.bst b/tests/format/junctions/internal-and-conflict/subsubproject-conflict.bst
new file mode 100644
index 000000000..e4715ea1d
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-conflict.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-conflict
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-conflict/project.conf b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-conflict/subsub-again.txt b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-and-conflict/subsubproject-conflict/target.bst b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/subsubproject-conflict/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-and-conflict/target.bst b/tests/format/junctions/internal-and-conflict/target.bst
new file mode 100644
index 000000000..5e661e6ba
--- /dev/null
+++ b/tests/format/junctions/internal-and-conflict/target.bst
@@ -0,0 +1,6 @@
+kind: stack
+
+depends:
+- subproject.bst:subtarget.bst
+- subsubproject-again.bst:target.bst
+- subsubproject-conflict.bst:target.bst
diff --git a/tests/format/junctions/internal-double/project.conf b/tests/format/junctions/internal-double/project.conf
new file mode 100644
index 000000000..20636c446
--- /dev/null
+++ b/tests/format/junctions/internal-double/project.conf
@@ -0,0 +1,2 @@
+name: test
+min-version: 2.0
diff --git a/tests/format/junctions/internal-double/subproject1.bst b/tests/format/junctions/internal-double/subproject1.bst
new file mode 100644
index 000000000..bfd692d00
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject1
diff --git a/tests/format/junctions/internal-double/subproject1/project.conf b/tests/format/junctions/internal-double/subproject1/project.conf
new file mode 100644
index 000000000..d82152220
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/project.conf
@@ -0,0 +1,6 @@
+name: subtest1
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject.bst
diff --git a/tests/format/junctions/internal-double/subproject1/subsubproject.bst b/tests/format/junctions/internal-double/subproject1/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-double/subproject1/subsubproject/project.conf b/tests/format/junctions/internal-double/subproject1/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-double/subproject1/subsubproject/subsub1.txt b/tests/format/junctions/internal-double/subproject1/subsubproject/subsub1.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/subsubproject/subsub1.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-double/subproject1/subsubproject/target.bst b/tests/format/junctions/internal-double/subproject1/subsubproject/target.bst
new file mode 100644
index 000000000..2d631ebba
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub1.txt
diff --git a/tests/format/junctions/internal-double/subproject1/subtarget.bst b/tests/format/junctions/internal-double/subproject1/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject1/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-double/subproject2.bst b/tests/format/junctions/internal-double/subproject2.bst
new file mode 100644
index 000000000..2343652e1
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject2
diff --git a/tests/format/junctions/internal-double/subproject2/project.conf b/tests/format/junctions/internal-double/subproject2/project.conf
new file mode 100644
index 000000000..8ed6c717a
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/project.conf
@@ -0,0 +1,6 @@
+name: subtest2
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject.bst
diff --git a/tests/format/junctions/internal-double/subproject2/subsubproject.bst b/tests/format/junctions/internal-double/subproject2/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-double/subproject2/subsubproject/project.conf b/tests/format/junctions/internal-double/subproject2/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-double/subproject2/subsubproject/subsub2.txt b/tests/format/junctions/internal-double/subproject2/subsubproject/subsub2.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/subsubproject/subsub2.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-double/subproject2/subsubproject/target.bst b/tests/format/junctions/internal-double/subproject2/subsubproject/target.bst
new file mode 100644
index 000000000..5cfa4e453
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub2.txt
diff --git a/tests/format/junctions/internal-double/subproject2/subtarget.bst b/tests/format/junctions/internal-double/subproject2/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-double/subproject2/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-double/subsubproject-again.bst b/tests/format/junctions/internal-double/subsubproject-again.bst
new file mode 100644
index 000000000..308642704
--- /dev/null
+++ b/tests/format/junctions/internal-double/subsubproject-again.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-again
diff --git a/tests/format/junctions/internal-double/subsubproject-again/project.conf b/tests/format/junctions/internal-double/subsubproject-again/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-double/subsubproject-again/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-double/subsubproject-again/subsub-again.txt b/tests/format/junctions/internal-double/subsubproject-again/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-double/subsubproject-again/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-double/subsubproject-again/target.bst b/tests/format/junctions/internal-double/subsubproject-again/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-double/subsubproject-again/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-double/target.bst b/tests/format/junctions/internal-double/target.bst
new file mode 100644
index 000000000..b579466d5
--- /dev/null
+++ b/tests/format/junctions/internal-double/target.bst
@@ -0,0 +1,6 @@
+kind: stack
+
+depends:
+- subproject1.bst:subtarget.bst
+- subproject2.bst:subtarget.bst
+- subsubproject-again.bst:target.bst
diff --git a/tests/format/junctions/internal-link/project.conf b/tests/format/junctions/internal-link/project.conf
new file mode 100644
index 000000000..20636c446
--- /dev/null
+++ b/tests/format/junctions/internal-link/project.conf
@@ -0,0 +1,2 @@
+name: test
+min-version: 2.0
diff --git a/tests/format/junctions/internal-link/subproject.bst b/tests/format/junctions/internal-link/subproject.bst
new file mode 100644
index 000000000..c88189cb0
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject
diff --git a/tests/format/junctions/internal-link/subproject/project.conf b/tests/format/junctions/internal-link/subproject/project.conf
new file mode 100644
index 000000000..ac5810334
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/project.conf
@@ -0,0 +1,6 @@
+name: subtest
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject-link.bst
diff --git a/tests/format/junctions/internal-link/subproject/subsubproject-link.bst b/tests/format/junctions/internal-link/subproject/subsubproject-link.bst
new file mode 100644
index 000000000..246a5e41c
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subsubproject-link.bst
@@ -0,0 +1,4 @@
+kind: link
+
+config:
+  target: subsubproject.bst
diff --git a/tests/format/junctions/internal-link/subproject/subsubproject.bst b/tests/format/junctions/internal-link/subproject/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-link/subproject/subsubproject/project.conf b/tests/format/junctions/internal-link/subproject/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-link/subproject/subsubproject/subsub.txt b/tests/format/junctions/internal-link/subproject/subsubproject/subsub.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subsubproject/subsub.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-link/subproject/subsubproject/target.bst b/tests/format/junctions/internal-link/subproject/subsubproject/target.bst
new file mode 100644
index 000000000..afafac601
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub.txt
diff --git a/tests/format/junctions/internal-link/subproject/subtarget.bst b/tests/format/junctions/internal-link/subproject/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-link/subproject/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-link/subsubproject-again.bst b/tests/format/junctions/internal-link/subsubproject-again.bst
new file mode 100644
index 000000000..308642704
--- /dev/null
+++ b/tests/format/junctions/internal-link/subsubproject-again.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-again
diff --git a/tests/format/junctions/internal-link/subsubproject-again/project.conf b/tests/format/junctions/internal-link/subsubproject-again/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-link/subsubproject-again/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-link/subsubproject-again/subsub-again.txt b/tests/format/junctions/internal-link/subsubproject-again/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-link/subsubproject-again/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-link/subsubproject-again/target.bst b/tests/format/junctions/internal-link/subsubproject-again/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-link/subsubproject-again/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-link/target.bst b/tests/format/junctions/internal-link/target.bst
new file mode 100644
index 000000000..bc8944592
--- /dev/null
+++ b/tests/format/junctions/internal-link/target.bst
@@ -0,0 +1,5 @@
+kind: stack
+
+depends:
+- subproject.bst:subtarget.bst
+- subsubproject-again.bst:target.bst
diff --git a/tests/format/junctions/internal-override/project.conf b/tests/format/junctions/internal-override/project.conf
new file mode 100644
index 000000000..20636c446
--- /dev/null
+++ b/tests/format/junctions/internal-override/project.conf
@@ -0,0 +1,2 @@
+name: test
+min-version: 2.0
diff --git a/tests/format/junctions/internal-override/subproject.bst b/tests/format/junctions/internal-override/subproject.bst
new file mode 100644
index 000000000..db1dd6253
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject.bst
@@ -0,0 +1,8 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject
+
+config:
+  overrides:
+    subsubproject.bst: subsubproject-override.bst
diff --git a/tests/format/junctions/internal-override/subproject/project.conf b/tests/format/junctions/internal-override/subproject/project.conf
new file mode 100644
index 000000000..1d44ec886
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/project.conf
@@ -0,0 +1,6 @@
+name: subtest
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject.bst
diff --git a/tests/format/junctions/internal-override/subproject/subsubproject.bst b/tests/format/junctions/internal-override/subproject/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-override/subproject/subsubproject/project.conf b/tests/format/junctions/internal-override/subproject/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-override/subproject/subsubproject/subsub.txt b/tests/format/junctions/internal-override/subproject/subsubproject/subsub.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/subsubproject/subsub.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-override/subproject/subsubproject/target.bst b/tests/format/junctions/internal-override/subproject/subsubproject/target.bst
new file mode 100644
index 000000000..afafac601
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub.txt
diff --git a/tests/format/junctions/internal-override/subproject/subtarget.bst b/tests/format/junctions/internal-override/subproject/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-override/subproject/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-override/subsubproject-again.bst b/tests/format/junctions/internal-override/subsubproject-again.bst
new file mode 100644
index 000000000..308642704
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-again.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-again
diff --git a/tests/format/junctions/internal-override/subsubproject-again/project.conf b/tests/format/junctions/internal-override/subsubproject-again/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-again/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-override/subsubproject-again/subsub-again.txt b/tests/format/junctions/internal-override/subsubproject-again/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-again/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-override/subsubproject-again/target.bst b/tests/format/junctions/internal-override/subsubproject-again/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-again/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-override/subsubproject-override.bst b/tests/format/junctions/internal-override/subsubproject-override.bst
new file mode 100644
index 000000000..a5e47cdc6
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-override.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-override
diff --git a/tests/format/junctions/internal-override/subsubproject-override/project.conf b/tests/format/junctions/internal-override/subsubproject-override/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-override/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-override/subsubproject-override/subsub-override.txt b/tests/format/junctions/internal-override/subsubproject-override/subsub-override.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-override/subsub-override.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-override/subsubproject-override/target.bst b/tests/format/junctions/internal-override/subsubproject-override/target.bst
new file mode 100644
index 000000000..ae732d025
--- /dev/null
+++ b/tests/format/junctions/internal-override/subsubproject-override/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-override.txt
diff --git a/tests/format/junctions/internal-override/target.bst b/tests/format/junctions/internal-override/target.bst
new file mode 100644
index 000000000..bc8944592
--- /dev/null
+++ b/tests/format/junctions/internal-override/target.bst
@@ -0,0 +1,5 @@
+kind: stack
+
+depends:
+- subproject.bst:subtarget.bst
+- subsubproject-again.bst:target.bst
diff --git a/tests/format/junctions/internal-simple/project.conf b/tests/format/junctions/internal-simple/project.conf
new file mode 100644
index 000000000..20636c446
--- /dev/null
+++ b/tests/format/junctions/internal-simple/project.conf
@@ -0,0 +1,2 @@
+name: test
+min-version: 2.0
diff --git a/tests/format/junctions/internal-simple/subproject.bst b/tests/format/junctions/internal-simple/subproject.bst
new file mode 100644
index 000000000..c88189cb0
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subproject
diff --git a/tests/format/junctions/internal-simple/subproject/project.conf b/tests/format/junctions/internal-simple/subproject/project.conf
new file mode 100644
index 000000000..1d44ec886
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/project.conf
@@ -0,0 +1,6 @@
+name: subtest
+min-version: 2.0
+
+junctions:
+  internal:
+  - subsubproject.bst
diff --git a/tests/format/junctions/internal-simple/subproject/subsubproject.bst b/tests/format/junctions/internal-simple/subproject/subsubproject.bst
new file mode 100644
index 000000000..f535ab0e0
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/subsubproject.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject
diff --git a/tests/format/junctions/internal-simple/subproject/subsubproject/project.conf b/tests/format/junctions/internal-simple/subproject/subsubproject/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/subsubproject/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-simple/subproject/subsubproject/subsub.txt b/tests/format/junctions/internal-simple/subproject/subsubproject/subsub.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/subsubproject/subsub.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-simple/subproject/subsubproject/target.bst b/tests/format/junctions/internal-simple/subproject/subsubproject/target.bst
new file mode 100644
index 000000000..afafac601
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/subsubproject/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub.txt
diff --git a/tests/format/junctions/internal-simple/subproject/subtarget.bst b/tests/format/junctions/internal-simple/subproject/subtarget.bst
new file mode 100644
index 000000000..5e6a76bac
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subproject/subtarget.bst
@@ -0,0 +1,10 @@
+kind: compose
+
+# Use a build dependency on our internal subsubproject target.
+#
+# There is currently no validation for this but it may be
+# introduced in the future. For correctness of this test,
+# use a build dependency.
+#
+build-depends:
+- subsubproject.bst:target.bst
diff --git a/tests/format/junctions/internal-simple/subsubproject-again.bst b/tests/format/junctions/internal-simple/subsubproject-again.bst
new file mode 100644
index 000000000..308642704
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subsubproject-again.bst
@@ -0,0 +1,4 @@
+kind: junction
+sources:
+- kind: local
+  path: subsubproject-again
diff --git a/tests/format/junctions/internal-simple/subsubproject-again/project.conf b/tests/format/junctions/internal-simple/subsubproject-again/project.conf
new file mode 100644
index 000000000..d11bcbb30
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subsubproject-again/project.conf
@@ -0,0 +1,2 @@
+name: subsubtest
+min-version: 2.0
diff --git a/tests/format/junctions/internal-simple/subsubproject-again/subsub-again.txt b/tests/format/junctions/internal-simple/subsubproject-again/subsub-again.txt
new file mode 100644
index 000000000..f73f3093f
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subsubproject-again/subsub-again.txt
@@ -0,0 +1 @@
+file
diff --git a/tests/format/junctions/internal-simple/subsubproject-again/target.bst b/tests/format/junctions/internal-simple/subsubproject-again/target.bst
new file mode 100644
index 000000000..1a90211de
--- /dev/null
+++ b/tests/format/junctions/internal-simple/subsubproject-again/target.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: subsub-again.txt
diff --git a/tests/format/junctions/internal-simple/target.bst b/tests/format/junctions/internal-simple/target.bst
new file mode 100644
index 000000000..bc8944592
--- /dev/null
+++ b/tests/format/junctions/internal-simple/target.bst
@@ -0,0 +1,5 @@
+kind: stack
+
+depends:
+- subproject.bst:subtarget.bst
+- subsubproject-again.bst:target.bst