mirror of
https://github.com/google/go-jsonnet.git
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123 lines
3.7 KiB
Python
123 lines
3.7 KiB
Python
# Copyright 2015 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import unittest
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import _gojsonnet
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# Returns (full_path, contents) if the file was successfully retrieved,
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# (full_path, None) if file not found, or throws an exception when the path
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# is invalid or an IO error occured.
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# It caches both hits and misses in the `cache` dict. Exceptions
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# do not need to be cached, because they abort the computation anyway.
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def try_path_cached(cache, dir, rel):
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if not rel:
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raise RuntimeError('Got invalid filename (empty string).')
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if rel[0] == '/':
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full_path = rel
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else:
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full_path = dir + rel
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if full_path[-1] == '/':
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raise RuntimeError('Attempted to import a directory')
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if full_path not in cache:
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if not os.path.isfile(full_path):
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cache[full_path] = None
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else:
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with open(full_path) as f:
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cache[full_path] = f.read().encode()
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return full_path, cache[full_path]
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def import_callback(dir, rel):
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cache = {}
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full_path, content = try_path_cached(cache, dir, rel)
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if content:
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return full_path, content
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raise RuntimeError('File not found')
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# Test native extensions
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def concat(a, b):
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return a + b
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def return_types():
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return {
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'a': [1, 2, 3, None, []],
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'b': 1.0,
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'c': True,
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'd': None,
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'e': {
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'x': 1,
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'y': 2,
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'z': ['foo']
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},
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}
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native_callbacks = {
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'concat': (('a', 'b'), concat),
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'return_types': ((), return_types),
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}
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class JsonnetTests(unittest.TestCase):
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def setUp(self):
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base_dir = os.path.join(os.path.dirname(__file__), "testdata")
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self.input_filename = os.path.join(base_dir, "basic_check.jsonnet")
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self.trivial_filename = os.path.join(base_dir, "trivial.jsonnet")
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self.test_filename = os.path.join(base_dir, "test.jsonnet")
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with open(self.input_filename, "r") as infile:
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self.input_snippet = infile.read()
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def test_evaluate_file(self):
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json_str = _gojsonnet.evaluate_file(
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self.input_filename,
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import_callback=import_callback,
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native_callbacks=native_callbacks,
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)
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self.assertEqual(json_str, "true\n")
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def test_evaluate_snippet(self):
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json_str = _gojsonnet.evaluate_snippet(
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self.test_filename,
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self.input_snippet,
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import_callback=import_callback,
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native_callbacks=native_callbacks,
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)
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self.assertEqual(json_str, "true\n")
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def test_import(self):
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json_str = _gojsonnet.evaluate_snippet(
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self.test_filename,
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"import 'trivial.jsonnet'",
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import_callback=import_callback,
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native_callbacks=native_callbacks,
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)
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self.assertEqual(json_str, "42\n")
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def test_double_import(self):
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json_str = _gojsonnet.evaluate_snippet(
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self.test_filename,
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"local x = import 'trivial.jsonnet';\n" +
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"local y = import 'trivial.jsonnet';\n" +
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"x + y",
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import_callback=import_callback,
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native_callbacks=native_callbacks,
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)
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self.assertEqual(json_str, "84\n")
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if __name__ == '__main__':
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unittest.main()
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