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277 lines (234 loc) · 8.53 KB
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defmodule Pythonx.ASTTest do
use ExUnit.Case, async: true
describe "scan_globals/1" do
test "assign" do
assert Pythonx.AST.scan_globals("""
x = 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
assert Pythonx.AST.scan_globals("""
x, y = 1, 2
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x", "y"])}
end
test "augmented assign" do
assert Pythonx.AST.scan_globals("""
x += 1
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["x"])}
end
test "annotated assign" do
assert Pythonx.AST.scan_globals("""
x: int = 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
end
test "import" do
assert Pythonx.AST.scan_globals("""
import ast
import numpy.random
import math as m
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["ast", "numpy", "m"])
}
end
test "import from" do
assert Pythonx.AST.scan_globals("""
from math import pi
from numpy.linalg import dot, inv
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["pi", "dot", "inv"])
}
end
test "function definition" do
assert Pythonx.AST.scan_globals("""
def fun():
import ast
x = 1
return x + 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["fun"])}
end
test "function definition with global as argument default" do
assert Pythonx.AST.scan_globals("""
def fun(x=x):
return x
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["fun"])}
end
test "async function definition" do
assert Pythonx.AST.scan_globals("""
async def fun():
import ast
x = 1
return x + 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["fun"])}
end
test "class definition" do
assert Pythonx.AST.scan_globals("""
class Cl:
def fun():
import ast
x = 1
return x + 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["Cl"])}
end
test "comprehension" do
assert Pythonx.AST.scan_globals("""
[num * num for num in nums]
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new([])}
assert Pythonx.AST.scan_globals("""
{num * num for num in nums}
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new([])}
assert Pythonx.AST.scan_globals("""
(num * num for num in nums)
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new([])}
assert Pythonx.AST.scan_globals("""
{num: num for num in nums}
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new([])}
assert Pythonx.AST.scan_globals("""
[x * x for x in x]
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new([])}
end
test "comprehension with walrus operator" do
# The := assignment leaks to the outer scope
assert Pythonx.AST.scan_globals("""
[square := num * num for num in nums]
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new(["square"])}
assert Pythonx.AST.scan_globals("""
{square := num * num for num in nums}
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new(["square"])}
assert Pythonx.AST.scan_globals("""
{num: (square := num * num) for num in nums}
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new(["square"])}
end
test "lambda" do
assert Pythonx.AST.scan_globals("""
x = lambda a, b: a + b
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
end
test "for" do
assert Pythonx.AST.scan_globals("""
for num in nums:
num
""") == %{referenced: MapSet.new(["nums"]), defined: MapSet.new(["num"])}
end
test "if" do
# Python allows for defining different variables in conditional
# branches, but that's only resolved at runtime, so we extract
# globals from both branches.
assert Pythonx.AST.scan_globals("""
if True:
x = 1
else:
y = 2
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x", "y"])}
end
test "match" do
# Same as with if, we extract globals from all branches.
assert Pythonx.AST.scan_globals("""
subject = {'x': 1}
match subject:
case {'x': x}:
a = x
case {'y': y}:
b = y
case {**rest}:
c = rest
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["subject", "x", "y", "a", "b", "c", "rest"])
}
assert Pythonx.AST.scan_globals("""
subject = [1, 2, 3]
match subject:
case [1, x]:
a = x
case [1, y, *rest]:
b = y
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["subject", "x", "y", "a", "b", "rest"])
}
assert Pythonx.AST.scan_globals("""
subject = [1, 2, 3]
match subject:
case [x] if x > 0:
a = 1
case tuple():
b = 1
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["subject", "x", "a", "b"])
}
assert Pythonx.AST.scan_globals("""
subject = [1, 2, 3]
match subject:
case [x] as y:
a = y
""") == %{
referenced: MapSet.new([]),
defined: MapSet.new(["subject", "x", "y", "a"])
}
end
test "try" do
assert Pythonx.AST.scan_globals("""
try:
raise RuntimeError("error")
except RuntimeError as e:
x = e
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
assert Pythonx.AST.scan_globals("""
try:
raise RuntimeError("error")
except RuntimeError as e1:
try:
raise RuntimeError("error")
except RuntimeError as e2:
x = (e1, e2)
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
end
test "global in top-level expression" do
assert Pythonx.AST.scan_globals("""
x + 1
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new([])}
end
test "global in function" do
assert Pythonx.AST.scan_globals("""
def fun(y):
return x + y
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["fun"])}
end
test "global in class" do
assert Pythonx.AST.scan_globals("""
class Cl:
def fun(y):
return x + y
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["Cl"])}
end
test "global definition before use" do
assert Pythonx.AST.scan_globals("""
x = 1
x + 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
assert Pythonx.AST.scan_globals("""
x = 1
x += 1
""") == %{referenced: MapSet.new([]), defined: MapSet.new(["x"])}
end
test "global definition after use" do
assert Pythonx.AST.scan_globals("""
x + 1
x = 1
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["x"])}
assert Pythonx.AST.scan_globals("""
x = x + 1
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["x"])}
assert Pythonx.AST.scan_globals("""
x += x + 1
""") == %{referenced: MapSet.new(["x"]), defined: MapSet.new(["x"])}
end
test "ignores builtins in references" do
assert Pythonx.AST.scan_globals("""
print(1)
len([])
""") == %{referenced: MapSet.new([]), defined: MapSet.new([])}
end
end
end