print captured logs before entering pdb

_pytest/debugging.py

@@ -97,6 +97,12 @@ def _enter_pdb(node, excinfo, rep):
         tw.sep(">", "captured stderr")
         tw.line(captured_stderr)
 
+    captured_logs = rep.caplog
+    if len(captured_logs) > 0:
+        if node.config.getoption('log_print') is not False:
+            tw.sep(">", "captured logs")
+            tw.line(captured_logs)
+
     tw.sep(">", "traceback")
     rep.toterminal(tw)
     tw.sep(">", "entering PDB")

changelog/3204.feature

@@ -0,0 +1 @@
+Captured logs are printed before entering pdb, unless ``--no-print-logs`` is defined.

testing/test_pdb.py

@@ -187,6 +187,56 @@ def test_1():
         assert "captured stderr" not in output
         self.flush(child)
 
+    def test_pdb_print_captured_logs(self, testdir):
+        p1 = testdir.makepyfile("""
+            def test_1():
+                import logging
+                logging.warn("get rekt")
+                assert False
+        """)
+        child = testdir.spawn_pytest("--pdb %s" % p1)
+        child.expect("captured logs")
+        child.expect("get rekt")
+        child.expect("(Pdb)")
+        child.sendeof()
+        rest = child.read().decode("utf8")
+        assert "1 failed" in rest
+        self.flush(child)
+
+    def test_pdb_dont_print_captured_logs_when_no_print_logs_is_defined(self, testdir):
+        p1 = testdir.makepyfile("""
+            def test_1():
+                import logging
+                logging.warn("get rekt")
+                assert False
+        """)
+        child = testdir.spawn_pytest("--pdb --no-print-logs %s" % p1)
+        child.expect("get rekt")
+        output = child.before.decode("utf8")
+        assert "captured logs" not in output
+        child.expect("(Pdb)")
+        child.sendeof()
+        rest = child.read().decode("utf8")
+        assert "1 failed" in rest
+        self.flush(child)
+
+    def test_pdb_doesnt_print_captured_logs_when_logging_plugin_is_disabled(self, testdir):
+        p1 = testdir.makepyfile("""
+            def test_1():
+                import logging
+                logging.warn("get rekt")
+                assert False
+        """)
+        child = testdir.spawn_pytest("--pdb -p no:logging %s" % p1)
+        child.expect("get rekt")
+        output = child.before.decode("utf8")
+        assert "captured logs" not in output
+        child.expect("(Pdb)")
+        child.sendeof()
+        rest = child.read().decode("utf8")
+        assert "1 failed" in rest
+        self.flush(child)
+
     def test_pdb_interaction_exception(self, testdir):
         p1 = testdir.makepyfile("""
             import pytest