added equality steps according to current definition

Author: RagnarW

test/tck/steps/driver_equality_steps.py

@@ -0,0 +1,53 @@
+from collections import deque
+
+from behave import *
+
+from neo4j.v1 import Path, Relationship
+from test.tck.tck_util import send_string
+
+use_step_matcher("re")
+
+
+@step("`(?P<key>.+)` is single value result of: (?P<statement>.+)")
+def step_impl(context, key, statement):
+    records = list(send_string(statement).stream())
+    assert len(records) == 1
+    assert len(records[0]) == 1
+    context.values[key] = records[0][0]
+
+
+@step("`(?P<key1>.+)` is a copy of `(?P<key2>.+)` path with flipped relationship direction")
+def step_impl(context, key1, key2):
+    path = context.values[key2]
+    nodes = path.nodes
+    new_relationships = []
+    for r in path.relationships:
+        start = r.end
+        end = r.start
+        tmp_r = Relationship(start, end, r.type, r.properties)
+        tmp_r.identity = r.identity
+        new_relationships.append(tmp_r)
+    entities = [nodes[0]]
+    for i in range(1,len(nodes)):
+        entities.append(new_relationships[i-1])
+        entities.append(nodes[i])
+
+    context.values[key1] = Path(*entities)
+
+
+@step("saved values should all equal")
+def step_impl(context):
+    values = context.values.values()
+    assert len(values) > 1
+    first_val = values.pop()
+    for item in values:
+        assert item == first_val
+
+
+@step("none of the saved values should be equal")
+def step_impl(context):
+    values = context.values.values()
+    assert len(values) > 1
+    first_val = values.pop()
+    for item in values:
+        assert item != first_val