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# Copyright 2019 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import unittest
from .code_node import ListNode
from .code_node import LiteralNode
from .code_node import SymbolNode
from .code_node import SymbolScopeNode
from .code_node import SymbolSensitiveSelectionNode
from .code_node import TextNode
from .code_node import WeakDependencyNode
from .code_node import render_code_node
from .codegen_accumulator import CodeGenAccumulator
from .mako_renderer import MakoRenderer
class CodeNodeTest(unittest.TestCase):
def setUp(self):
super(CodeNodeTest, self).setUp()
self.addTypeEqualityFunc(str, self.assertMultiLineEqual)
def assertRenderResult(self, node, expected):
if node.renderer is None:
node.set_renderer(MakoRenderer())
if node.accumulator is None:
node.set_accumulator(CodeGenAccumulator())
def simplify(text):
return "\n".join(
[" ".join(line.split()) for line in text.split("\n")])
actual = simplify(render_code_node(node))
expected = simplify(expected)
self.assertEqual(actual, expected)
def test_literal_node(self):
"""
Tests that, in LiteralNode, the special characters of template (%, ${},
etc) are not processed.
"""
root = LiteralNode("<% x = 42 %>${x}")
self.assertRenderResult(root, "<% x = 42 %>${x}")
def test_empty_literal_node(self):
root = LiteralNode("")
self.assertRenderResult(root, "")
def test_text_node(self):
"""Tests that the template language works in TextNode."""
root = TextNode("<% x = 42 %>${x}")
self.assertRenderResult(root, "42")
def test_empty_text_node(self):
root = TextNode("")
self.assertRenderResult(root, "")
def test_list_operations_of_sequence_node(self):
"""
Tests that list operations (insert, append, and extend) of ListNode
work just same as Python built-in list.
"""
root = ListNode(separator=",")
root.extend([
LiteralNode("2"),
LiteralNode("4"),
])
root.insert(1, LiteralNode("3"))
root.insert(0, LiteralNode("1"))
root.insert(100, LiteralNode("5"))
root.append(LiteralNode("6"))
self.assertRenderResult(root, "1,2,3,4,5,6")
root.remove(root[0])
root.remove(root[2])
root.remove(root[-1])
self.assertRenderResult(root, "2,3,5")
def test_list_node_head_and_tail(self):
self.assertRenderResult(ListNode(), "")
self.assertRenderResult(ListNode(head="head"), "")
self.assertRenderResult(ListNode(tail="tail"), "")
self.assertRenderResult(
ListNode([TextNode("-content-")], head="head", tail="tail"),
"head-content-tail")
def test_nested_sequence(self):
"""Tests nested ListNodes."""
root = ListNode(separator=",")
nested = ListNode(separator=",")
nested.extend([
LiteralNode("2"),
LiteralNode("3"),
LiteralNode("4"),
])
root.extend([
LiteralNode("1"),
nested,
LiteralNode("5"),
])
self.assertRenderResult(root, "1,2,3,4,5")
def test_symbol_definition_chains(self):
"""
Tests that use of SymbolNode inserts necessary SymbolDefinitionNode
appropriately.
"""
root = SymbolScopeNode(tail="\n")
root.register_code_symbols([
SymbolNode("var1", "int ${var1} = ${var2} + ${var3};"),
SymbolNode("var2", "int ${var2} = ${var5};"),
SymbolNode("var3", "int ${var3} = ${var4};"),
SymbolNode("var4", "int ${var4} = 1;"),
SymbolNode("var5", "int ${var5} = 2;"),
])
root.append(TextNode("(void)${var1};"))
self.assertRenderResult(
root, """\
int var5 = 2;
int var2 = var5;
int var4 = 1;
int var3 = var4;
int var1 = var2 + var3;
(void)var1;
""")
def test_weak_dependency_node(self):
root = SymbolScopeNode(tail="\n")
root.register_code_symbols([
SymbolNode("var1", "int ${var1} = 1;"),
SymbolNode("var2", "int ${var2} = 2;"),
SymbolNode("var3", "int ${var3} = 3;"),
])
root.extend([
WeakDependencyNode(dep_syms=["var1", "var2"]),
TextNode("f();"),
TextNode("(void)${var3};"),
TextNode("(void)${var1};"),
])
self.assertRenderResult(
root, """\
int var1 = 1;
f();
int var3 = 3;
(void)var3;
(void)var1;
""")
def test_symbol_sensitive_selection_node(self):
root = SymbolScopeNode(tail="\n")
root.register_code_symbols([
SymbolNode("var1", "int ${var1} = 1;"),
SymbolNode("var2", "int ${var2} = 2;"),
SymbolNode("var3", "int ${var3} = 3;"),
])
choice1 = SymbolSensitiveSelectionNode.Choice(
symbol_names=["var1", "var2"],
code_node=TextNode("F(${var1}, ${var2});"))
choice2 = SymbolSensitiveSelectionNode.Choice(
symbol_names=["var3"], code_node=TextNode("F(${var3});"))
choice3 = SymbolSensitiveSelectionNode.Choice(
symbol_names=[], code_node=TextNode("F();"))
root.append(SymbolSensitiveSelectionNode([choice1, choice2, choice3]))
self.assertRenderResult(root, """\
F();
""")
root.insert(0, TextNode("(void)${var3};"))
self.assertRenderResult(root, """\
int var3 = 3;
(void)var3;
F(var3);
""")
root.insert(0, TextNode("(void)${var2};"))
self.assertRenderResult(
root, """\
int var2 = 2;
(void)var2;
int var3 = 3;
(void)var3;
F(var3);
""")
root.insert(0, TextNode("(void)${var1};"))
self.assertRenderResult(
root, """\
int var1 = 1;
(void)var1;
int var2 = 2;
(void)var2;
int var3 = 3;
(void)var3;
F(var1, var2);
""")
def test_template_error_handling(self):
renderer = MakoRenderer()
root = SymbolScopeNode()
root.set_renderer(renderer)
root.append(
SymbolScopeNode([
# Have Mako raise a NameError.
TextNode("${unbound_symbol}"),
]))
with self.assertRaises(NameError):
renderer.reset()
root.render(renderer)
callers_on_error = list(renderer.callers_on_error)
self.assertEqual(len(callers_on_error), 3)
self.assertEqual(callers_on_error[0], root[0][0])
self.assertEqual(callers_on_error[1], root[0])
self.assertEqual(callers_on_error[2], root)
self.assertEqual(renderer.last_caller_on_error, root[0][0])
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