1 files changed, 90 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/test/test_vendor_tools.py b/python/mozbuild/mozbuild/test/test_vendor_tools.py
new file mode 100644
index 0000000000..271be6d7da
--- /dev/null
+++ b/python/mozbuild/mozbuild/test/test_vendor_tools.py
@@ -0,0 +1,90 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import mozunit
+
+from mozbuild.vendor.vendor_manifest import list_of_paths_to_readable_string
+
+
+def test_list_of_paths_to_readable_string():
+    paths = ["/tmp/a", "/tmp/b"]
+    s = list_of_paths_to_readable_string(paths)
+    assert not s.endswith(", ]")
+    assert s.endswith("]")
+    assert "/tmp/a" in s
+    assert "/tmp/b" in s
+
+    paths = ["/tmp/a", "/tmp/b", "/tmp/c", "/tmp/d"]
+    s = list_of_paths_to_readable_string(paths)
+    assert not s.endswith(", ")
+    assert s.endswith("]")
+    assert "/tmp/a" not in s
+    assert "/tmp/b" not in s
+    assert "4 items in /tmp" in s
+
+    paths = [
+        "/tmp/a",
+        "/tmp/b",
+        "/tmp/c",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+    ]
+    s = list_of_paths_to_readable_string(paths)
+    assert not s.endswith(", ")
+    assert s.endswith("]")
+    assert "/tmp/a" not in s
+    assert " a" not in s
+    assert "/tmp/b" not in s
+    assert "10 (omitted) items in /tmp" in s
+
+    paths = ["/tmp", "/foo"]
+    s = list_of_paths_to_readable_string(paths)
+    assert not s.endswith(", ")
+    assert s.endswith("]")
+    assert "/tmp" in s
+    assert "/foo" in s
+
+    paths = [
+        "/tmp/a",
+        "/tmp/b",
+        "/tmp/c",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+        "/tmp/d",
+    ]
+    paths.extend(["/foo/w", "/foo/x", "/foo/y", "/foo/z"])
+    paths.extend(["/bar/m", "/bar/n"])
+    paths.extend(["/etc"])
+    s = list_of_paths_to_readable_string(paths)
+    assert not s.endswith(", ")
+    assert s.endswith("]")
+    assert "/tmp/a" not in s
+    assert " d" not in s
+    assert "/tmp/b" not in s
+    assert "10 (omitted) items in /tmp" in s
+
+    assert "/foo/w" not in s
+    assert "/foo/x" not in s
+    assert "4 items in /foo" in s
+    assert " w" in s
+
+    assert "/bar/m" in s
+    assert "/bar/n" in s
+
+    assert "/etc" in s
+
+    assert len(s) < len(str(paths))
+
+
+if __name__ == "__main__":
+    mozunit.main()