1 files changed, 50 insertions, 0 deletions
diff --git a/tools/lint/test/test_file_whitespace.py b/tools/lint/test/test_file_whitespace.py
new file mode 100644
index 0000000000..7dc815d6ca
--- /dev/null
+++ b/tools/lint/test/test_file_whitespace.py
@@ -0,0 +1,50 @@
+import mozunit
+
+LINTER = "file-whitespace"
+fixed = 0
+
+
+def test_lint_file_whitespace(lint, paths):
+    results = lint(paths())
+    print(results)
+    assert len(results) == 5
+
+    assert "File does not end with newline character" in results[1].message
+    assert results[1].level == "error"
+    assert "bad-newline.c" in results[1].relpath
+
+    assert "Empty Lines at end of file" in results[0].message
+    assert results[0].level == "error"
+    assert "bad-newline.c" in results[0].relpath
+
+    assert "Windows line return" in results[2].message
+    assert results[2].level == "error"
+    assert "bad-windows.c" in results[2].relpath
+
+    assert "Trailing whitespace" in results[3].message
+    assert results[3].level == "error"
+    assert "bad.c" in results[3].relpath
+    assert results[3].lineno == 1
+
+    assert "Trailing whitespace" in results[4].message
+    assert results[4].level == "error"
+    assert "bad.c" in results[4].relpath
+    assert results[4].lineno == 2
+
+
+def test_lint_file_whitespace_fix(lint, paths, create_temp_file):
+    contents = """int main() {  \n
+    return 0;  \n
+}
+
+
+"""
+
+    path = create_temp_file(contents, "bad.cpp")
+    lint([path], fix=True)
+    # Gives a different answer on Windows. Probably because of Windows CR
+    assert fixed == 3 or fixed == 2
+
+
+if __name__ == "__main__":
+    mozunit.main()