[PATCH] osmo-gsm-tester[master]: cdf: Add API to scale percent to target value

[Holger Freyther]

Review at  https://gerrit.osmocom.org/6231

cdf: Add API to scale percent to target value

We want to start 10k of instances and it is easier to
have the necessary conversion from percent to number
in the CDF function.

Change-Id: I9d5b63909eef3d592aec6d51452f3b1811d8cc07
---
M src/osmo_ms_driver/cdf.py
1 file changed, 48 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-tester refs/changes/31/6231/1

diff --git a/src/osmo_ms_driver/cdf.py b/src/osmo_ms_driver/cdf.py
index fbdc05f..e84d9c7 100644
--- a/src/osmo_ms_driver/cdf.py
+++ b/src/osmo_ms_driver/cdf.py
@@ -37,12 +37,22 @@
         self._fun = fun
         self._x = 0.0
         self._y = self._fun(self._x)
+        self._target = 1.0
+
+    def set_target(self, scale):
+        """
+        Scale the percentage to the target value..
+        """
+        self._target = scale
 
     def is_done(self):
         return self._y >= 1.0
 
     def current_value(self):
         return self._y
+
+    def current_scaled_value(self):
+        return self._y * self._target
 
     def step_once(self):
         self._x = self._x + self._step.total_seconds()
@@ -95,6 +105,44 @@
     1.0...
     >>> a.is_done()
     True
+
+    >>> a = linear_with_duration(timedelta(seconds=10), step_size=timedelta(seconds=2))
+    >>> a.set_target(1000)
+    >>> a.is_done()
+    False
+    >>> a.current_value()
+    0.0
+    >>> a.current_scaled_value()
+    0.0
+    >>> a.step_once()
+    >>> a.current_value()
+    0.2
+    >>> a.current_scaled_value()
+    200.0
+    >>> a.step_once()
+    >>> a.current_value()
+    0.4
+    >>> a.current_scaled_value()
+    400.0
+    >>> a.step_once()
+    >>> a.current_value()
+    0.6...
+    >>> a.current_scaled_value()
+    600.0...
+    >>> a.step_once()
+    >>> a.current_value()
+    0.8...
+    >>> a.current_scaled_value()
+    800.0...
+    >>> a.is_done()
+    False
+    >>> a.step_once()
+    >>> a.current_value()
+    1.0...
+    >>> a.current_scaled_value()
+    1000.0...
+    >>> a.is_done()
+    True
     """
     slope = 1.0/duration.total_seconds()
     return linear_with_slope(slope, step_size)

-- 
To view, visit https://gerrit.osmocom.org/6231
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I9d5b63909eef3d592aec6d51452f3b1811d8cc07
Gerrit-PatchSet: 1
Gerrit-Project: osmo-gsm-tester
Gerrit-Branch: master
Gerrit-Owner: Holger Freyther <holger at freyther.de>