first succeeding precedence tests

test/completion/operations.py

@@ -1,25 +0,0 @@
-"""
-Test Jedi's operation understanding. Jedi should understand simple additions,
-multiplications, etc.
-"""
-x = [1, '', 'a', 1.0]
-
-#? int() str() float()
-x[12]
-
-#? str()
-x[1 + 1]
-
-index = 0 + 1
-
-#? str()
-x[index]
-
-
-def calculate(number):
-    return number + constant
-
-constant = 1
-
-#? float()
-x[calculate(2)]

test/test_evaluate/test_precedence.py

@@ -0,0 +1,13 @@
+from jedi.evaluate import precedence
+
+
+def test_simple():
+    p = precedence.create_precedence(iter([1, '+', 2]))
+    assert p.left == 1
+    assert p.operator == '+'
+    assert p.right == 2
+
+
+def test_invalid():
+    """Should just return a simple operation"""
+    assert precedence.create_precedence(iter([1, '+'])) == 1