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3rdparty/shaderc/glslc/test/environment.py

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+# Copyright 2015 The Shaderc Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Classes for conveniently specifying a test environment.
+
+These classes have write() methods that create objects in a test's environment.
+For instance, File creates a file, and Directory creates a directory with some
+files or subdirectories in it.
+
+Example:
+  test.environment = Directory('.', [
+    File('a.vert', 'void main(){}'),
+    Directory('subdir', [
+      File('b', 'b content'),
+      File('c', 'c content')
+    ])
+  ])
+
+In general, these classes don't clean up the disk content they create.  They
+were written in a test framework that handles clean-up at a higher level.
+
+"""
+
+import os
+
+class Directory:
+    """Specifies a directory or a subdirectory."""
+    def __init__(self, name, content):
+        """content is a list of File or Directory objects."""
+        self.name = name
+        self.content = content
+
+    @staticmethod
+    def create(path):
+        """Creates a directory path if it doesn't already exist."""
+        try:
+            os.makedirs(path)
+        except OSError: # Handles both pre-existence and a racing creation.
+            if not os.path.isdir(path):
+                raise
+
+    def write(self, parent):
+        """Creates a self.name directory within parent (which is a string path) and
+        recursively writes the content in it.
+
+        """
+        full_path = os.path.join(parent, self.name)
+        Directory.create(full_path)
+        for c in self.content:
+            c.write(full_path)
+
+class File:
+    """Specifies a file by name and content."""
+    def __init__(self, name, content):
+        self.name = name
+        self.content = content
+
+    def write(self, directory):
+        """Writes content to directory/name."""
+        with open(os.path.join(directory, self.name), 'w') as f:
+            f.write(self.content)