Autogen: Create NICs for TCP suites.

+ Put Regenerator internal functions ourside class.
+ Duplicate into _default_ and _tcp_ functions.
+ Rework Testcase to be a single class with two factories.
+ Improve suite and testcase naming.

Change-Id: I1f835b576c476c1a40c8c52469b1876695f9ae73
Signed-off-by: Vratko Polak <vrpolak@cisco.com>
(cherry picked from commit ae7dc0011f376861ba9259b7cb5166777520799c)

4 files changed, 281 insertions, 257 deletions

diff --git a/resources/libraries/python/autogen/DefaultTestcase.py b/resources/libraries/python/autogen/DefaultTestcase.py
deleted file mode 100644
index 5db81a80d4..0000000000
--- a/resources/libraries/python/autogen/DefaultTestcase.py
+++ /dev/null
@@ -1,35 +0,0 @@
-# Copyright (c) 2018 Cisco and/or its affiliates.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at:
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Module with utilities for autogeneration of non-customizable testcases."""
-
-from .Testcase import Testcase
-
-
-class DefaultTestcase(Testcase):
-    """Testcase subclass with a rigid template string."""
-
-    def __init__(self, suite_id):
-        """Construct instance for identified suite.
-
-        :param suite_id: Suite identifier, without NIC prefix and .robot suffix.
-            Example: ethip6srhip6-ip6base-srv6enc2sids-nodecaps-ndrpdr
-        :type suite_id: str
-        """
-        self.suite_id = suite_id
-        template_string = r'''
-| ${tc_num}-${frame_str}-${cores_str}c-''' + suite_id + r'''
-| | [Tags] | ${frame_str} | ${cores_str}C
-| | frame_size=${frame_num} | phy_cores=${cores_num}
-'''
-        super(DefaultTestcase, self).__init__(template_string)
diff --git a/resources/libraries/python/autogen/Regenerator.py b/resources/libraries/python/autogen/Regenerator.py
index 89acff73ae..a9f3ef433d 100644
--- a/resources/libraries/python/autogen/Regenerator.py
+++ b/resources/libraries/python/autogen/Regenerator.py
@@ -19,8 +19,17 @@ from glob import glob
 from os import getcwd
 import sys
 
-from .DefaultTestcase import DefaultTestcase
 from resources.libraries.python.Constants import Constants
+from resources.libraries.python.autogen.Testcase import Testcase
+
+
+PROTOCOL_TO_MIN_FRAME_SIZE = {
+    "ip4": 64,
+    "ip6": 78,
+    "ethip4vxlan": 114,  # What is the real minimum for latency stream?
+    "dot1qip4vxlan": 118
+}
+MIN_FRAME_SIZE_VALUES = PROTOCOL_TO_MIN_FRAME_SIZE.values()
 
 
 # Copied from https://stackoverflow.com/a/14981125
@@ -29,227 +38,234 @@ def eprint(*args, **kwargs):
     print(*args, file=sys.stderr, **kwargs)
 
 
+def replace_defensively(
+        whole, to_replace, replace_with, how_many, msg, in_filename):
+    """Replace substrings while checking the number of occurences.
+
+    Return edited copy of the text. Assuming "whole" is really a string,
+    or something else with .replace not affecting it.
+
+    :param whole: The text to perform replacements on.
+    :param to_replace: Substring occurences of which to replace.
+    :param replace_with: Substring to replace occurences with.
+    :param how_many: Number of occurences to expect.
+    :param msg: Error message to raise.
+    :param in_filename: File name in which the error occured.
+    :type whole: str
+    :type to_replace: str
+    :type replace_with: str
+    :type how_many: int
+    :type msg: str
+    :type in_filename: str
+    :return: The whole text after replacements are done.
+    :rtype: str
+    :raise ValueError: If number of occurences does not match.
+    """
+    found = whole.count(to_replace)
+    if found != how_many:
+        raise ValueError(in_filename + ": " + msg)
+    return whole.replace(to_replace, replace_with)
+
+
+def get_iface_and_suite_id(filename):
+    """Get interface and suite ID.
+
+    Interface ID is the part of suite name
+    which should be replaced for other NIC.
+    Suite ID is the part os suite name
+    which si appended to testcase names.
+
+    :param filename: Suite file.
+    :type filename: str
+    :returns: Interface ID, Suite ID.
+    :rtype: (str, str)
+    """
+    dash_split = filename.split("-", 1)
+    if len(dash_split[0]) <= 4:
+        # It was something like "2n1l", we need one more split.
+        dash_split = dash_split[1].split("-", 1)
+    return dash_split[0], dash_split[1].split(".", 1)[0]
+
+
+def add_default_testcases(testcase, iface, suite_id, file_out, tc_kwargs_list):
+    """Add default testcases to file.
+
+    :param testcase: Testcase class.
+    :param iface: Interface.
+    :param suite_id: Suite ID.
+    :param file_out: File to write testcases to.
+    :param tc_kwargs_list: Key-value pairs used to construct testcases.
+    :type testcase: Testcase
+    :type iface: str
+    :type suite_id: str
+    :type file_out: file
+    :type tc_kwargs_list: dict
+    """
+    # We bump tc number in any case, so that future enables/disables
+    # do not affect the numbering of other test cases.
+    for num, kwargs in enumerate(tc_kwargs_list, start=1):
+        # TODO: Is there a better way to disable some combinations?
+        emit = True
+        if kwargs["frame_size"] == 9000:
+            if "vic1227" in iface:
+                # Not supported in HW.
+                emit = False
+            if "vic1385" in iface:
+                # Not supported in HW.
+                emit = False
+        if "-16vm2t-" in suite_id or "-16dcr2t-" in suite_id:
+            if kwargs["phy_cores"] > 3:
+                # CSIT lab only has 28 (physical) core processors,
+                # so these test would fail when attempting to assign cores.
+                emit = False
+        if "-24vm1t-" in suite_id or "-24dcr1t-" in suite_id:
+            if kwargs["phy_cores"] > 3:
+                # CSIT lab only has 28 (physical) core processors,
+                # so these test would fail when attempting to assign cores.
+                emit = False
+        if "soak" in suite_id:
+            # Soak test take too long, do not risk other than tc01.
+            if kwargs["phy_cores"] != 1:
+                emit = False
+            if kwargs["frame_size"] not in MIN_FRAME_SIZE_VALUES:
+                emit = False
+        if emit:
+            file_out.write(testcase.generate(num=num, **kwargs))
+
+
+def add_tcp_testcases(testcase, file_out, tc_kwargs_list):
+    """Add TCP testcases to file.
+
+    :param testcase: Testcase class.
+    :param file_out: File to write testcases to.
+    :param tc_kwargs_list: Key-value pairs used to construct testcases.
+    :type testcase: Testcase
+    :type file_out: file
+    :type tc_kwargs_list: dict
+    """
+    for num, kwargs in enumerate(tc_kwargs_list, start=1):
+        file_out.write(testcase.generate(num=num, **kwargs))
+
+
+def write_default_files(in_filename, in_prolog, kwargs_list):
+    """Using given filename and prolog, write all generated suites.
+
+    :param in_filename: Template filename to derive real filenames from.
+    :param in_prolog: Template content to derive real content from.
+    :param kwargs_list: List of kwargs for add_default_testcase.
+    :type in_filename: str
+    :type in_prolog: str
+    :type kwargs_list: list of dict
+    """
+    for suite_type in Constants.PERF_TYPE_TO_KEYWORD:
+        tmp_filename = replace_defensively(
+            in_filename, "ndrpdr", suite_type, 1,
+            "File name should contain suite type once.", in_filename)
+        tmp_prolog = replace_defensively(
+            in_prolog, "ndrpdr".upper(), suite_type.upper(), 1,
+            "Suite type should appear once in uppercase (as tag).",
+            in_filename)
+        tmp_prolog = replace_defensively(
+            tmp_prolog,
+            "Find NDR and PDR intervals using optimized search",
+            Constants.PERF_TYPE_TO_KEYWORD[suite_type], 1,
+            "Main search keyword should appear once in suite.",
+            in_filename)
+        tmp_prolog = replace_defensively(
+            tmp_prolog,
+            Constants.PERF_TYPE_TO_SUITE_DOC_VER["ndrpdr"],
+            Constants.PERF_TYPE_TO_SUITE_DOC_VER[suite_type],
+            1, "Exact suite type doc not found.", in_filename)
+        tmp_prolog = replace_defensively(
+            tmp_prolog,
+            Constants.PERF_TYPE_TO_TEMPLATE_DOC_VER["ndrpdr"],
+            Constants.PERF_TYPE_TO_TEMPLATE_DOC_VER[suite_type],
+            1, "Exact template type doc not found.", in_filename)
+        _, suite_id = get_iface_and_suite_id(tmp_filename)
+        testcase = Testcase.default(suite_id)
+        for nic_name in Constants.NIC_NAME_TO_CODE:
+            out_filename = replace_defensively(
+                tmp_filename, "10ge2p1x710",
+                Constants.NIC_NAME_TO_CODE[nic_name], 1,
+                "File name should contain NIC code once.", in_filename)
+            out_prolog = replace_defensively(
+                tmp_prolog, "Intel-X710", nic_name, 2,
+                "NIC name should appear twice (tag and variable).",
+                in_filename)
+            if out_prolog.count("HW_") == 2:
+                # TODO CSIT-1481: Crypto HW should be read
+                # from topology file instead.
+                if nic_name in Constants.NIC_NAME_TO_CRYPTO_HW:
+                    out_prolog = replace_defensively(
+                        out_prolog, "HW_DH895xcc",
+                        Constants.NIC_NAME_TO_CRYPTO_HW[nic_name], 1,
+                        "HW crypto name should appear.", in_filename)
+            iface, suite_id = get_iface_and_suite_id(out_filename)
+            with open(out_filename, "w") as file_out:
+                file_out.write(out_prolog)
+                add_default_testcases(
+                    testcase, iface, suite_id, file_out, kwargs_list)
+
+
+def write_tcp_files(in_filename, in_prolog, kwargs_list):
+    """Using given filename and prolog, write all generated suites.
+
+    :param in_filename: Template filename to derive real filenames from.
+    :param in_prolog: Template content to derive real content from.
+    :param kwargs_list: List of kwargs for add_default_testcase.
+    :type in_filename: str
+    :type in_prolog: str
+    :type kwargs_list: list of dict
+    """
+    # TODO: Generate rps from cps? There are subtle differences.
+    _, suite_id = get_iface_and_suite_id(in_filename)
+    testcase = Testcase.tcp(suite_id)
+    for nic_name in Constants.NIC_NAME_TO_CODE:
+        out_filename = replace_defensively(
+            in_filename, "10ge2p1x710",
+            Constants.NIC_NAME_TO_CODE[nic_name], 1,
+            "File name should contain NIC code once.", in_filename)
+        out_prolog = replace_defensively(
+            in_prolog, "Intel-X710", nic_name, 2,
+            "NIC name should appear twice (tag and variable).",
+            in_filename)
+        with open(out_filename, "w") as file_out:
+            file_out.write(out_prolog)
+            add_tcp_testcases(testcase, file_out, kwargs_list)
+
+
 class Regenerator(object):
     """Class containing file generating methods."""
 
-    def __init__(self, testcase_class=DefaultTestcase, quiet=True):
-        """Initialize Testcase class to use.
+    def __init__(self, quiet=True):
+        """Initialize the instance.
 
-        TODO: See the type doc for testcase_class?
-        It implies the design is wrong. Fix it.
-        Easiest: Hardcode Regenerator to use DefaultTestcase only.
-
-        :param testcase_class: Subclass of DefaultTestcase for generation.
-            Default: DefaultTestcase
         :param quiet: Reduce log prints (to stderr) when True (default).
-        :type testcase_class: subclass of DefaultTestcase accepting suite_id
         :type quiet: boolean
         """
-        self.testcase_class = testcase_class
         self.quiet = quiet
 
-    def regenerate_glob(self, pattern, protocol="ip4", tc_kwargs_list=None):
+    def regenerate_glob(self, pattern, protocol="ip4"):
         """Regenerate files matching glob pattern based on arguments.
 
         In the current working directory, find all files matching
-        the glob pattern. Use testcase template (from init) to regenerate
-        test cases, autonumbering them, taking arguments from list.
-        If the list is None, use default list, which depends on ip6 usage.
+        the glob pattern. Use testcase template according to suffix
+        to regenerate test cases, autonumbering them,
+        taking arguments from list.
 
         Log-like prints are emited to sys.stderr.
 
         :param pattern: Glob pattern to select files. Example: *-ndrpdr.robot
-        :param is_ip6: Flag determining minimal frame size. Default: False
-        :param tc_kwargs_list: Arguments defining the testcases. Default: None
-            When None, default list is used.
-            List item is a dict, argument names are keys.
-            The initialized testcase_class should accept those, and "num".
-            DefaultTestcase accepts "frame_size" and "phy_cores".
+        :param protocol: String determining minimal frame size. Default: "ip4"
         :type pattern: str
-        :type is_ip6: boolean
-        :type tc_kwargs_list: list of tuple or None
+        :type protocol: str
+        :raises RuntimeError: If invalid source suite is encountered.
         """
-
-        protocol_to_min_frame_size = {
-            "ip4": 64,
-            "ip6": 78,
-            "ethip4vxlan": 114,  # What is the real minimum for latency stream?
-            "dot1qip4vxlan": 118
-        }
-        min_frame_size_values = protocol_to_min_frame_size.values()
-
-        def get_iface_and_suite_id(filename):
-            """Get interface and suite ID.
-
-            :param filename: Suite file.
-            :type filename: str
-            :returns: Interface ID, Suite ID.
-            :rtype: tuple
-            """
-            dash_split = filename.split("-", 1)
-            if len(dash_split[0]) <= 4:
-                # It was something like "2n1l", we need one more split.
-                dash_split = dash_split[1].split("-", 1)
-            return dash_split[0], dash_split[1].split(".", 1)[0]
-
-        def add_testcase(testcase, iface, suite_id, file_out, num, **kwargs):
-            """Add testcase to file.
-
-            :param testcase: Testcase class.
-            :param iface: Interface.
-            :param suite_id: Suite ID.
-            :param file_out: File to write testcases to.
-            :param num: Testcase number.
-            :param kwargs: Key-value pairs used to construct testcase.
-            :type testcase: Testcase
-            :type iface: str
-            :type suite_id: str
-            :type file_out: file
-            :type num: int
-            :type kwargs: dict
-            :returns: Next testcase number.
-            :rtype: int
-            """
-            # TODO: Is there a better way to disable some combinations?
-            emit = True
-            if kwargs["frame_size"] == 9000:
-                if "vic1227" in iface:
-                    # Not supported in HW.
-                    emit = False
-                if "vic1385" in iface:
-                    # Not supported in HW.
-                    emit = False
-            if "-16vm2t-" in suite_id or "-16dcr2t-" in suite_id:
-                if kwargs["phy_cores"] > 3:
-                    # CSIT lab only has 28 (physical) core processors,
-                    # so these test would fail when attempting to assign cores.
-                    emit = False
-            if "-24vm1t-" in suite_id or "-24dcr1t-" in suite_id:
-                if kwargs["phy_cores"] > 3:
-                    # CSIT lab only has 28 (physical) core processors,
-                    # so these test would fail when attempting to assign cores.
-                    emit = False
-            if "soak" in suite_id:
-                # Soak test take too long, do not risk other than tc01.
-                if kwargs["phy_cores"] != 1:
-                    emit = False
-                if kwargs["frame_size"] not in min_frame_size_values:
-                    emit = False
-            if emit:
-                file_out.write(testcase.generate(num=num, **kwargs))
-            # We bump tc number in any case, so that future enables/disables
-            # do not affect the numbering of other test cases.
-            return num + 1
-
-        def add_testcases(testcase, iface, suite_id, file_out, tc_kwargs_list):
-            """Add testcases to file.
-
-            :param testcase: Testcase class.
-            :param iface: Interface.
-            :param suite_id: Suite ID.
-            :param file_out: File to write testcases to.
-            :param tc_kwargs_list: Key-value pairs used to construct testcases.
-            :type testcase: Testcase
-            :type iface: str
-            :type suite_id: str
-            :type file_out: file
-            :type tc_kwargs_list: dict
-            """
-            num = 1
-            for tc_kwargs in tc_kwargs_list:
-                num = add_testcase(
-                    testcase, iface, suite_id, file_out, num, **tc_kwargs)
-
-        def replace_defensively(
-                whole, to_replace, replace_with, how_many, msg, in_filename):
-            """Replace substrings while checking the number of occurences.
-
-            Return edited copy of the text (so original string is not affected).
-
-            :param whole: The text to perform replacements on.
-            :param to_replace: Substring occurences of which to replace.
-            :param replace_with: Substring to replace occurences with.
-            :param how_many: Number of occurences to expect.
-            :param msg: Error message to raise.
-            :param in_filename: File name in which the error occured.
-            :type whole: str
-            :type to_replace: str
-            :type replace_with: str
-            :type how_many: int
-            :type msg: str
-            :type in_filename: str
-            :return: The whole text after replacements are done.
-            :rtype: str
-            :raise ValueError: If number of occurences does not match.
-            """
-            found = whole.count(to_replace)
-            if found != how_many:
-                raise ValueError(in_filename + ": " + msg)
-            return whole.replace(to_replace, replace_with)
-
-        def write_files(in_filename, in_prolog, kwargs_list):
-            """Using given filename and prolog, write all generated suites.
-
-            :param in_filename: Template filename to derive real filenames from.
-            :param in_prolog: Template content to derive real content from.
-            :param kwargs_list: List of kwargs for add_testcase.
-            :type in_filename: str
-            :type in_prolog: str
-            :type kwargs_list: list of dict
-            """
-            for suite_type in Constants.PERF_TYPE_TO_KEYWORD.keys():
-                tmp_filename = replace_defensively(
-                    in_filename, "ndrpdr", suite_type, 1,
-                    "File name should contain suite type once.", in_filename)
-                tmp_prolog = replace_defensively(
-                    in_prolog, "ndrpdr".upper(), suite_type.upper(), 1,
-                    "Suite type should appear once in uppercase (as tag).",
-                    in_filename)
-                tmp_prolog = replace_defensively(
-                    tmp_prolog,
-                    "Find NDR and PDR intervals using optimized search",
-                    Constants.PERF_TYPE_TO_KEYWORD[suite_type], 1,
-                    "Main search keyword should appear once in suite.",
-                    in_filename)
-                tmp_prolog = replace_defensively(
-                    tmp_prolog,
-                    Constants.PERF_TYPE_TO_SUITE_DOC_VER["ndrpdr"],
-                    Constants.PERF_TYPE_TO_SUITE_DOC_VER[suite_type],
-                    1, "Exact suite type doc not found.", in_filename)
-                tmp_prolog = replace_defensively(
-                    tmp_prolog,
-                    Constants.PERF_TYPE_TO_TEMPLATE_DOC_VER["ndrpdr"],
-                    Constants.PERF_TYPE_TO_TEMPLATE_DOC_VER[suite_type],
-                    1, "Exact template type doc not found.", in_filename)
-                _, suite_id = get_iface_and_suite_id(tmp_filename)
-                testcase = self.testcase_class(suite_id)
-                for nic_name in Constants.NIC_NAME_TO_CODE.keys():
-                    out_filename = replace_defensively(
-                        tmp_filename, "10ge2p1x710",
-                        Constants.NIC_NAME_TO_CODE[nic_name], 1,
-                        "File name should contain NIC code once.", in_filename)
-                    out_prolog = replace_defensively(
-                        tmp_prolog, "Intel-X710", nic_name, 2,
-                        "NIC name should appear twice (tag and variable).",
-                        in_filename)
-                    if out_prolog.count("HW_") == 2:
-                        # TODO CSIT-1481: Crypto HW should be read
-                        # from topology file instead.
-                        if nic_name in Constants.NIC_NAME_TO_CRYPTO_HW.keys():
-                            out_prolog = replace_defensively(
-                                out_prolog, "HW_DH895xcc",
-                                Constants.NIC_NAME_TO_CRYPTO_HW[nic_name], 1,
-                                "HW crypto name should appear.", in_filename)
-                    iface, suite_id = get_iface_and_suite_id(out_filename)
-                    with open(out_filename, "w") as file_out:
-                        file_out.write(out_prolog)
-                        add_testcases(
-                            testcase, iface, suite_id, file_out, kwargs_list)
-
         if not self.quiet:
             eprint("Regenerator starts at {cwd}".format(cwd=getcwd()))
-        min_frame_size = protocol_to_min_frame_size[protocol]
-        kwargs_list = tc_kwargs_list if tc_kwargs_list else [
+
+        min_frame_size = PROTOCOL_TO_MIN_FRAME_SIZE[protocol]
+        default_kwargs_list = [
             {"frame_size": min_frame_size, "phy_cores": 1},
             {"frame_size": min_frame_size, "phy_cores": 2},
             {"frame_size": min_frame_size, "phy_cores": 4},
@@ -263,22 +279,26 @@ class Regenerator(object):
             {"frame_size": "IMIX_v4_1", "phy_cores": 2},
             {"frame_size": "IMIX_v4_1", "phy_cores": 4}
         ]
+        tcp_kwargs_list = [{"phy_cores": i, "frame_size": 0} for i in (1, 2, 4)]
         for in_filename in glob(pattern):
             if not self.quiet:
                 eprint("Regenerating in_filename:", in_filename)
-            if not in_filename.endswith("ndrpdr.robot"):
-                eprint("Error in {fil}: non-primary suite type encountered."
-                       .format(fil=in_filename))
-                sys.exit(1)
             iface, _ = get_iface_and_suite_id(in_filename)
             if not iface.endswith("10ge2p1x710"):
-                eprint("Error in {fil}: non-primary NIC encountered."
-                       .format(fil=in_filename))
-                sys.exit(1)
+                raise RuntimeError(
+                    "Error in {fil}: non-primary NIC found.".format(
+                        fil=in_filename))
             with open(in_filename, "r") as file_in:
                 in_prolog = "".join(
                     file_in.read().partition("*** Test Cases ***")[:-1])
-            write_files(in_filename, in_prolog, kwargs_list)
+            if in_filename.endswith("-ndrpdr.robot"):
+                write_default_files(in_filename, in_prolog, default_kwargs_list)
+            elif in_filename[-10:] in ("-cps.robot", "-rps.robot"):
+                write_tcp_files(in_filename, in_prolog, tcp_kwargs_list)
+            else:
+                raise RuntimeError(
+                    "Error in {fil}: non-primary suite type found.".format(
+                        fil=in_filename))
         if not self.quiet:
             eprint("Regenerator ends.")
         eprint()  # To make autogen check output more readable.
diff --git a/resources/libraries/python/autogen/Testcase.py b/resources/libraries/python/autogen/Testcase.py
index 7d0a29b0ad..70c212211c 100644
--- a/resources/libraries/python/autogen/Testcase.py
+++ b/resources/libraries/python/autogen/Testcase.py
@@ -38,6 +38,7 @@ class Testcase(object):
         """Return string of test case code with placeholders filled.
 
         Fail if there are placeholders left unfilled.
+        It is not required for all placeholders to be present in template.
 
         :param num: Test case number. Example value: 4.
         :param frame_size: Imix string or numeric frame size. Example: 74.
@@ -68,3 +69,42 @@ class Testcase(object):
                 "tc_num": "tc{num:02d}".format(num=num)
             })
         return self.template.substitute(subst_dict)
+
+    @classmethod
+    def default(cls, suite_id):
+        """Factory method for creating "default" testcase objects.
+
+        Testcase name will contain both frame size and core count.
+        Used for most performance tests, except TCP ones.
+
+        :param suite_id: Part of suite name to distinguish from other suites.
+        :type suite_id: str
+        :returns: Instance for generating testcase text of this type.
+        :rtype: Testcase
+        """
+        template_string = r'''
+| ${tc_num}-${frame_str}-${cores_str}c-''' + suite_id + r'''
+| | [Tags] | ${frame_str} | ${cores_str}C
+| | frame_size=${frame_num} | phy_cores=${cores_num}
+'''
+        return cls(template_string)
+
+    @classmethod
+    def tcp(cls, suite_id):
+        """Factory method for creating "tcp" testcase objects.
+
+        Testcase name will contain core count, but not frame size.
+
+        :param suite_id: Part of suite name to distinguish from other suites.
+        :type suite_id: str
+        :returns: Instance for generating testcase text of this type.
+        :rtype: Testcase
+        """
+        # TODO: Choose a better frame size identifier for streamed protocols
+        # (TCP, QUIC, SCTP, ...) where DUT (not TG) decides frame size.
+        template_string = r'''
+| ${tc_num}-IMIX-${cores_str}c-''' + suite_id + r'''
+| | [Tags] | ${cores_str}C
+| | phy_cores=${cores_num}
+'''
+        return cls(template_string)
diff --git a/resources/libraries/python/tcp.py b/resources/libraries/python/tcp.py
index 1b08912b7e..f3a24cbd06 100644
--- a/resources/libraries/python/tcp.py
+++ b/resources/libraries/python/tcp.py
@@ -73,17 +73,16 @@ class TCPUtils(object):
         :type fifo_size: str
         :type private_segment_size: str
         """
-        if http_static_plugin == True:
-            cmd='http static server www-root {www_root} '\
-                'prealloc-fifos {prealloc_fifos} fifo-size {fifo_size}'\
-                ' private-segment-size {pvt_seg_size}'\
-                .format(www_root=cls.www_root_dir,
-                        prealloc_fifos=prealloc_fifos, fifo_size=fifo_size,
-                        pvt_seg_size=private_segment_size)
+        if http_static_plugin:
+            cmd = 'http static server www-root {www_root} '\
+                  'prealloc-fifos {prealloc_fifos} fifo-size {fifo_size}'\
+                  ' private-segment-size {pvt_seg_size}'\
+                  .format(www_root=cls.www_root_dir,
+                          prealloc_fifos=prealloc_fifos, fifo_size=fifo_size,
+                          pvt_seg_size=private_segment_size)
         else:
-            cmd='test http server static prealloc-fifos {prealloc_fifos} '\
-                'fifo-size {fifo_size} private-segment-size {pvt_seg_size}'\
-                .format(prealloc_fifos=prealloc_fifos, fifo_size=fifo_size,
-                        pvt_seg_size=private_segment_size)
+            cmd = 'test http server static prealloc-fifos {prealloc_fifos} '\
+                  'fifo-size {fifo_size} private-segment-size {pvt_seg_size}'\
+                  .format(prealloc_fifos=prealloc_fifos, fifo_size=fifo_size,
+                          pvt_seg_size=private_segment_size)
         PapiSocketExecutor.run_cli_cmd(node, cmd)
-