From 0cfc55c1751458fea97e907034b79288a470bfed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roberto=20Abdelkader=20Mart=C3=ADnez=20P=C3=A9rez?=
 <robertomartinezp@gmail.com>
Date: Wed, 21 Aug 2019 08:23:20 +0200
Subject: [PATCH] Helper function to compare nested structures in tests.

---
 spec/test/features/steps/comparedict.py | 38 +++++++++++++++++++++++++
 spec/test/features/steps/steps.py       |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 spec/test/features/steps/comparedict.py

diff --git a/spec/test/features/steps/comparedict.py b/spec/test/features/steps/comparedict.py
new file mode 100644
index 0000000..7b5f968
--- /dev/null
+++ b/spec/test/features/steps/comparedict.py
@@ -0,0 +1,38 @@
+from functools import singledispatch
+
+
+def assert_same_type(f):
+    def wrapper(a, b):
+        if type(a) != type(b):
+            raise TypeError("Non-matching types")
+        return f(a, b)
+    return wrapper
+
+
+@singledispatch
+@assert_same_type
+def is_subset(model, obj):
+    return model == obj
+
+
+@is_subset.register(dict)
+@assert_same_type
+def _(model, obj):
+    for key, value in model.items():
+        if key not in obj or not is_subset(value, obj[key]):
+            return False
+    return True
+
+
+@is_subset.register(list)
+@assert_same_type
+def _(model, obj):
+    if type(model) != type(obj):
+        raise TypeError("Non-matching types")
+    return is_subset(set(model), set(obj))
+
+
+@is_subset.register(set)
+@assert_same_type
+def _(model, obj):
+    return model <= obj
diff --git a/spec/test/features/steps/steps.py b/spec/test/features/steps/steps.py
index f2247c3..16edd2d 100644
--- a/spec/test/features/steps/steps.py
+++ b/spec/test/features/steps/steps.py
@@ -7,6 +7,7 @@ import subprocess
 
 import requests
 from environconfig import EnvironConfig, StringVar, IntVar, BooleanVar
+from comparedict import is_subset
 
 import logging