1 files changed, 114 insertions, 0 deletions
diff --git a/testing/mozbase/mozprocess/tests/test_process_reader.py b/testing/mozbase/mozprocess/tests/test_process_reader.py
new file mode 100644
index 0000000000..36e2188ead
--- /dev/null
+++ b/testing/mozbase/mozprocess/tests/test_process_reader.py
@@ -0,0 +1,114 @@
+import subprocess
+import sys
+import unittest
+
+import mozunit
+from mozprocess.processhandler import ProcessReader, StoreOutput
+
+
+def run_python(str_code, stdout=subprocess.PIPE, stderr=subprocess.PIPE):
+    cmd = [sys.executable, "-c", str_code]
+    return subprocess.Popen(cmd, stdout=stdout, stderr=stderr)
+
+
+class TestProcessReader(unittest.TestCase):
+    def setUp(self):
+        self.out = StoreOutput()
+        self.err = StoreOutput()
+        self.finished = False
+
+        def on_finished():
+            self.finished = True
+
+        self.timeout = False
+
+        def on_timeout():
+            self.timeout = True
+
+        self.reader = ProcessReader(
+            stdout_callback=self.out,
+            stderr_callback=self.err,
+            finished_callback=on_finished,
+            timeout_callback=on_timeout,
+        )
+
+    def test_stdout_callback(self):
+        proc = run_python("print(1); print(2)")
+        self.reader.start(proc)
+        self.reader.thread.join()
+
+        self.assertEqual([x.decode("utf8") for x in self.out.output], ["1", "2"])
+        self.assertEqual(self.err.output, [])
+
+    def test_stderr_callback(self):
+        proc = run_python('import sys; sys.stderr.write("hello world\\n")')
+        self.reader.start(proc)
+        self.reader.thread.join()
+
+        self.assertEqual(self.out.output, [])
+        self.assertEqual([x.decode("utf8") for x in self.err.output], ["hello world"])
+
+    def test_stdout_and_stderr_callbacks(self):
+        proc = run_python(
+            'import sys; sys.stderr.write("hello world\\n"); print(1); print(2)'
+        )
+        self.reader.start(proc)
+        self.reader.thread.join()
+
+        self.assertEqual([x.decode("utf8") for x in self.out.output], ["1", "2"])
+        self.assertEqual([x.decode("utf8") for x in self.err.output], ["hello world"])
+
+    def test_finished_callback(self):
+        self.assertFalse(self.finished)
+        proc = run_python("")
+        self.reader.start(proc)
+        self.reader.thread.join()
+        self.assertTrue(self.finished)
+
+    def test_timeout(self):
+        self.reader.timeout = 0.05
+        self.assertFalse(self.timeout)
+        proc = run_python("import time; time.sleep(0.1)")
+        self.reader.start(proc)
+        self.reader.thread.join()
+        self.assertTrue(self.timeout)
+        self.assertFalse(self.finished)
+
+    def test_output_timeout(self):
+        self.reader.output_timeout = 0.05
+        self.assertFalse(self.timeout)
+        proc = run_python("import time; time.sleep(0.1)")
+        self.reader.start(proc)
+        self.reader.thread.join()
+        self.assertTrue(self.timeout)
+        self.assertFalse(self.finished)
+
+    def test_read_without_eol(self):
+        proc = run_python('import sys; sys.stdout.write("1")')
+        self.reader.start(proc)
+        self.reader.thread.join()
+        self.assertEqual([x.decode("utf8") for x in self.out.output], ["1"])
+
+    def test_read_with_strange_eol(self):
+        proc = run_python('import sys; sys.stdout.write("1\\r\\r\\r\\n")')
+        self.reader.start(proc)
+        self.reader.thread.join()
+        self.assertEqual([x.decode("utf8") for x in self.out.output], ["1"])
+
+    def test_mixed_stdout_stderr(self):
+        proc = run_python(
+            'import sys; sys.stderr.write("hello world\\n"); print(1); print(2)',
+            stderr=subprocess.STDOUT,
+        )
+        self.reader.start(proc)
+        self.reader.thread.join()
+
+        self.assertEqual(
+            sorted([x.decode("utf8") for x in self.out.output]),
+            sorted(["1", "2", "hello world"]),
+        )
+        self.assertEqual(self.err.output, [])
+
+
+if __name__ == "__main__":
+    mozunit.main()