Add support for reading multiple files at once

1 files changed, 52 insertions, 0 deletions

diff --git a/test/test_multifile.py b/test/test_multifile.py
new file mode 100755
index 00000000..5fb44bc5
--- /dev/null
+++ b/test/test_multifile.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+"""Test reading from several input files."""
+
+import argparse
+import difflib
+import os
+import shlex
+import subprocess
+import sys
+import tempfile
+
+parser = argparse.ArgumentParser(description=__doc__)
+
+parser.add_argument("--serdi", default="./serdi", help="path to serdi")
+parser.add_argument("--wrapper", default="", help="executable wrapper")
+parser.add_argument("testdir", help="multifile test directory")
+
+args = parser.parse_args(sys.argv[1:])
+in1_path = os.path.join(args.testdir, "input1.ttl")
+in2_path = os.path.join(args.testdir, "input2.trig")
+check_path = os.path.join(args.testdir, "output.nq")
+command = shlex.split(args.wrapper) + [args.serdi, in1_path, in2_path]
+
+
+def _show_diff(from_lines, to_lines, from_filename, to_filename):
+    same = True
+    for line in difflib.unified_diff(
+        from_lines,
+        to_lines,
+        fromfile=os.path.abspath(from_filename),
+        tofile=os.path.abspath(to_filename),
+    ):
+        sys.stderr.write(line)
+        same = False
+
+    return same
+
+
+with tempfile.TemporaryFile(mode="w+", encoding="utf-8") as out:
+    proc = subprocess.run(command, check=False, stdout=out)
+
+    assert proc.returncode == 0
+
+    out.seek(0)
+    with open(check_path, "r", encoding="utf-8") as check:
+
+        output_matches = _show_diff(
+            check.readlines(), out.readlines(), check_path, "output"
+        )
+
+        assert output_matches