Adding warning counter to analyzers.

src/alogamous/warning_analyzer.py

@@ -0,0 +1,12 @@
+from alogamous import analyzer
+
+
+class EchoAnalyzer(analyzer.Analyzer):
+    def __init__(self):
+        self.lines = []
+
+    def read_log_line(self, line):
+        self.lines.append(line)
+
+    def report(self, out_stream):
+        out_stream.write("\n".join(self.lines))

tests/warning_analyzer_test.py

@@ -0,0 +1,17 @@
+import io
+
+from alogamous import analyzer, echo_analyzer
+
+
+def test_echo_lines():
+    in_stream = io.StringIO("""line1
+        line2
+        line3""")
+    out_stream = io.StringIO()
+    analyzer.analyze_log_stream([echo_analyzer.EchoAnalyzer()], in_stream, out_stream)
+    assert (
+        out_stream.getvalue()
+        == """line1
+        line2
+        line3"""
+    )