[RFC PATCH v2 07/10] dts: add simple stats report

["Juraj Linkeš" <juraj.linkes@pantheon.tech>]

Provide a summary of testcase passed/failed/blocked counts.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
---
 dts/framework/dts.py            |  3 ++
 dts/framework/stats_reporter.py | 65 +++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 dts/framework/stats_reporter.py

diff --git a/dts/framework/dts.py b/dts/framework/dts.py
index d606f8de2e..a7c243a5c3 100644
--- a/dts/framework/dts.py
+++ b/dts/framework/dts.py
@@ -14,11 +14,13 @@
 from .exception import DTSError, ReturnCode
 from .logger import DTSLOG, getLogger
 from .settings import SETTINGS
+from .stats_reporter import TestStats
 from .test_result import Result
 from .utils import check_dts_python_version
 
 dts_logger: DTSLOG = getLogger("dts")
 result: Result = Result()
+test_stats: TestStats = TestStats(SETTINGS.output_dir + "/statistics.txt")
 
 
 def run_all() -> None:
@@ -29,6 +31,7 @@ def run_all() -> None:
     return_code = ReturnCode.NO_ERR
     global dts_logger
     global result
+    global test_stats
 
     # check the python version of the server that run dts
     check_dts_python_version()
diff --git a/dts/framework/stats_reporter.py b/dts/framework/stats_reporter.py
new file mode 100644
index 0000000000..a2735d0a1d
--- /dev/null
+++ b/dts/framework/stats_reporter.py
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+# Copyright(c) 2022 PANTHEON.tech s.r.o.
+
+"""
+Simple text file statistics generator
+"""
+
+
+class TestStats(object):
+    """
+    Generates a small statistics file containing the number of passing,
+    failing and blocked tests. It makes use of a Result instance as input.
+    """
+
+    def __init__(self, filename):
+        self.filename = filename
+
+    def __add_stat(self, test_result):
+        if test_result is not None:
+            if test_result[0] == "PASSED":
+                self.passed += 1
+            if test_result[0] == "FAILED":
+                self.failed += 1
+            if test_result[0] == "BLOCKED":
+                self.blocked += 1
+            self.total += 1
+
+    def __count_stats(self):
+        for sut in self.result.all_suts():
+            for target in self.result.all_targets(sut):
+                for suite in self.result.all_test_suites(sut, target):
+                    for case in self.result.all_test_cases(sut, target, suite):
+                        test_result = self.result.result_for(sut, target, suite, case)
+                        if len(test_result):
+                            self.__add_stat(test_result)
+
+    def __write_stats(self):
+        sut_nodes = self.result.all_suts()
+        if len(sut_nodes) == 1:
+            self.stats_file.write(
+                f"dpdk_version = {self.result.current_dpdk_version(sut_nodes[0])}\n"
+            )
+        else:
+            for sut in sut_nodes:
+                dpdk_version = self.result.current_dpdk_version(sut)
+                self.stats_file.write(f"{sut}.dpdk_version = {dpdk_version}\n")
+        self.__count_stats()
+        self.stats_file.write(f"Passed     = {self.passed}\n")
+        self.stats_file.write(f"Failed     = {self.failed}\n")
+        self.stats_file.write(f"Blocked    = {self.blocked}\n")
+        rate = 0
+        if self.total > 0:
+            rate = self.passed * 100.0 / self.total
+        self.stats_file.write(f"Pass rate  = {rate:.1f}\n")
+
+    def save(self, result):
+        self.passed = 0
+        self.failed = 0
+        self.blocked = 0
+        self.total = 0
+        self.stats_file = open(self.filename, "w+")
+        self.result = result
+        self.__write_stats()
+        self.stats_file.close()
-- 
2.30.2