use verbosity count for trace limit rather than binary on off (#41)

* use verbosity count for trace limit rather than binary on off

* added test for verbosity count

pytest_retry/retry_plugin.py

@@ -62,7 +62,7 @@ class RetryManager:
 
     def __init__(self) -> None:
         self.reporter: ReportHandler = OfflineReporter()
-        self.trace_limit: Optional[int] = -1
+        self.trace_limit: Optional[int] = 1
         self.node_stats: dict[str, dict] = {}
         self.messages = (
             " failed on attempt {attempt}! Retrying!\n\t",
@@ -298,9 +298,10 @@ def pytest_configure(config: pytest.Config) -> None:
         "that the test is retried only on those exceptions, or excluding those exceptions. "
         "Any statement which returns a bool can be used as a condition",
     )
-    if config.getoption("verbose"):
-        # if pytest config has -v enabled, then don't limit traceback length
-        retry_manager.trace_limit = None
+    verbosity = config.getoption("verbose")
+    if verbosity:
+        # set trace limit according to verbosity count, or unlimited if 5
+        retry_manager.trace_limit = verbosity if verbosity < 5 else None
     Defaults.configure(config)
     Defaults.add("FILTERED_EXCEPTIONS", config.hook.pytest_set_filtered_exceptions() or [])
     Defaults.add("EXCLUDED_EXCEPTIONS", config.hook.pytest_set_excluded_exceptions() or [])

tests/test_retry_plugin.py

@@ -924,6 +924,22 @@ def test_eventually_passes_once_more():
     assert_outcomes(result, passed=2, failed=1, retried=2)
 
 
+@mark.parametrize('verbosity', ['vv', 'vvv', 'vvvv'])
+def test_stack_trace_depth_uses_verbosity_count(testdir, verbosity):
+    testdir.makepyfile(
+        """
+        a = []
+        def test_eventually_passes():
+            a.append(1)
+            assert len(a) > 1
+        """
+    )
+    result = testdir.runpytest("--retries", "1", f"-{verbosity}")
+
+    assert_outcomes(result, passed=1, retried=1)
+    assert len([line for line in result.outlines if line.startswith('\t  File')]) == len(verbosity)
+
+
 @mark.skipif(xdist_installed is False, reason="Only run if xdist is installed locally")
 def test_xdist_reporting_compatability(testdir):
     testdir.makepyfile(