Roll IDL to multivm@1329

core/scripts/make_token_matcher_unittest.py

+#!/usr/bin/env python
+# Copyright (C) 2013 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import tempfile
+import unittest
+
+from make_token_matcher import BadInput, CaseLineProcessor, MainLineProcessor, Optimizer, process_file, SwitchCase, SwitchLineProcessor
+
+
+class OptimizerTest(unittest.TestCase):
+    def test_nonalphabetic(self):
+        optimizer = Optimizer(None, None, None)
+        self.assertRaises(
+            BadInput,
+            optimizer.inspect_array,
+            [SwitchCase('-', None), SwitchCase('x', None)],
+            [0])
+
+
+class MainLineProcessorTest(unittest.TestCase):
+    def test_switch(self):
+        processor = MainLineProcessor(None)
+        switchLineProcessor = processor.process_line('SWITCH(array, length) {')
+        self.assertIsInstance(switchLineProcessor, SwitchLineProcessor)
+        self.assertEquals('array', switchLineProcessor.array_variable)
+        self.assertEquals('length', switchLineProcessor.length_variable)
+
+
+class SwitchLineProcessorTest(unittest.TestCase):
+    def test_case(self):
+        processor = SwitchLineProcessor(None, None, None, None)
+        caseLineProcessor = processor.process_line('CASE("identifier") {')
+        self.assertIsInstance(caseLineProcessor, CaseLineProcessor)
+        self.assertEquals('identifier', caseLineProcessor.identifier)
+
+    def test_unexpected(self):
+        processor = SwitchLineProcessor(None, None, None, None)
+        self.assertRaises(
+            BadInput,
+            processor.process_line,
+            'unexpected')
+
+    def test_repeated(self):
+        processor = SwitchLineProcessor(None, None, None, None)
+        processor.process_line('CASE("x") {').process_line('}')
+        caseLineProcessor = processor.process_line('CASE("x") {')
+        self.assertRaises(
+            BadInput,
+            caseLineProcessor.process_line,
+            '}')
+
+
+class CaseLineProcessorTest(unittest.TestCase):
+    def test_break(self):
+        processor = CaseLineProcessor(None, None, None)
+        self.assertRaises(
+            BadInput,
+            processor.process_line,
+            'break;')
+
+
+class ProcessFileTest(unittest.TestCase):
+    SOURCE_SMALL = """
+        SWITCH(p, q) {
+            CASE("a(") {
+                X;
+            }
+            CASE("b(") {
+                Y;
+            }
+        }
+        """
+
+    EXPECTED_SMALL = """
+        if (LIKELY(q == 2)) {
+            if (LIKELY(p[1] == '(')) {
+                if ((p[0] | 0x20) == 'a') {
+                    X;
+                } else if (LIKELY((p[0] | 0x20) == 'b')) {
+                    Y;
+                }
+            }
+        }
+        """
+
+    SOURCE_MEDIUM = """
+        SWITCH (p, q) {
+            CASE ("ab") {
+                X;
+            }
+            CASE ("cd") {
+                Y;
+            }
+            CASE ("ed") {
+                Z;
+            }
+        }
+        """
+
+    EXPECTED_MEDIUM = """
+        if (LIKELY(q == 2)) {
+            if ((p[1] | 0x20) == 'b') {
+                if (LIKELY((p[0] | 0x20) == 'a')) {
+                    X;
+                }
+            } else if (LIKELY((p[1] | 0x20) == 'd')) {
+                if ((p[0] | 0x20) == 'c') {
+                    Y;
+                } else if (LIKELY((p[0] | 0x20) == 'e')) {
+                    Z;
+                }
+            }
+        }
+        """
+
+    SOURCE_LARGE = """
+        prefix;
+        SWITCH(p, q) {
+            CASE("hij") {
+                R;
+            }
+            CASE("efg") {
+                S;
+            }
+            CASE("c-") {
+                T;
+            }
+            CASE("klm") {
+                U;
+            }
+
+            CASE("d-") {
+                V;
+            }
+            CASE("a") {
+                W;
+                X;
+            }
+            CASE("b-") {
+                Y;
+                Z;
+            }
+        }
+        suffix;
+        """
+
+    EXPECTED_LARGE = """
+        prefix;
+        switch (q) {
+        case 1: {
+            if (LIKELY((p[0] | 0x20) == 'a')) {
+                W;
+                X;
+            }
+        } break;
+        case 2: {
+            if (LIKELY(p[1] == '-')) {
+                switch ((p[0] | 0x20)) {
+                case 'b': {
+                    Y;
+                    Z;
+                } break;
+                case 'c': {
+                    T;
+                } break;
+                case 'd': {
+                    V;
+                } break;
+                }
+            }
+        } break;
+        case 3: {
+            switch ((p[0] | 0x20)) {
+            case 'e': {
+                if (LIKELY((p[1] | 0x20) == 'f' && (p[2] | 0x20) == 'g')) {
+                    S;
+                }
+            } break;
+            case 'h': {
+                if (LIKELY((p[1] | 0x20) == 'i' && (p[2] | 0x20) == 'j')) {
+                    R;
+                }
+            } break;
+            case 'k': {
+                if (LIKELY((p[1] | 0x20) == 'l' && (p[2] | 0x20) == 'm')) {
+                    U;
+                }
+            } break;
+            }
+        } break;
+        }
+        suffix;
+        """
+
+    def validate(self, source, expected):
+        with tempfile.NamedTemporaryFile() as input_file:
+            with tempfile.NamedTemporaryFile() as generated_file:
+                input_file.write(source)
+                input_file.flush()
+                process_file(input_file.name, generated_file.name)
+                # Our code generation does not yet implement pretty indentation.
+                actual = generated_file.read().replace('    ', '')
+                expected = expected.replace('    ', '')
+                self.assertEquals(actual, expected)
+
+    def test_small(self):
+        self.validate(ProcessFileTest.SOURCE_SMALL, ProcessFileTest.EXPECTED_SMALL)
+
+    def test_medium(self):
+        self.validate(ProcessFileTest.SOURCE_MEDIUM, ProcessFileTest.EXPECTED_MEDIUM)
+
+    def test_large(self):
+        self.validate(ProcessFileTest.SOURCE_LARGE, ProcessFileTest.EXPECTED_LARGE)
+
+
+if __name__ == "__main__":
+    unittest.main()