TEST: add test of OTB BandMath application in processing

(cherry picked from commit 1e7018f)

python/plugins/processing/tests/CMakeLists.txt

@@ -12,4 +12,6 @@ IF(ENABLE_TESTS)
   ADD_PYTHON_TEST(ProcessingGdalAlgorithmsTest GdalAlgorithmsTest.py)
   ADD_PYTHON_TEST(ProcessingGrass7AlgorithmsImageryTest Grass7AlgorithmsImageryTest.py)
   ADD_PYTHON_TEST(ProcessingGrass7AlgorithmsRasterTest Grass7AlgorithmsRasterTest.py)
+  #TODO uncomment when OTB is installed on Travis CI instance
+  #ADD_PYTHON_TEST(ProcessingOTBAlgorithmsTest OTBAlgorithmsTest.py)
 ENDIF(ENABLE_TESTS)

python/plugins/processing/tests/OTBAlgorithmsTest.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    OTBAlgorithmTests.py
+    ---------------------
+    Date                 : August 2016
+    Copyright            : (C) 2016 by Manuel Grizonnet
+    Email                : manuel.grizonnet@cnes.fr
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Manuel Grizonnet'
+__date__ = 'August 2016'
+__copyright__ = '(C) 2016, Manuel Grizonnet'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = ':%H$'
+
+import AlgorithmsTestBase
+
+import nose2
+import shutil
+
+from qgis.testing import (
+    start_app,
+    unittest
+)
+
+
+class TestOTBAlgorithms(unittest.TestCase, AlgorithmsTestBase.AlgorithmsTest):
+
+    @classmethod
+    def setUpClass(cls):
+        start_app()
+        from processing.core.Processing import Processing
+        Processing.initialize()
+        cls.cleanup_paths = []
+
+    @classmethod
+    def tearDownClass(cls):
+        for path in cls.cleanup_paths:
+            shutil.rmtree(path)
+
+    def test_definition_file(self):
+        return 'otb_algorithm_tests.yaml'
+
+
+if __name__ == '__main__':
+    nose2.main()

python/plugins/processing/tests/data/raster.tif.aux.xml

@@ -0,0 +1,20 @@
+<PAMDataset>
+  <PAMRasterBand band="1">
+    <Histograms>
+      <HistItem>
+        <HistMin>825.8245192307693</HistMin>
+        <HistMax>899.1754807692307</HistMax>
+        <BucketCount>208</BucketCount>
+        <IncludeOutOfRange>0</IncludeOutOfRange>
+        <Approximate>0</Approximate>
+        <HistCounts>4|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|6|0|0|0|0|0|4|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|9|0|0|0|0|0|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|10|0|0|0|0|4|0|0|0|0|0|0|0|0|6|0|0|0|0|9|0|0|0|0|0|6|0|0|0|0|0|0|0|0|0|0|4|0|0|9|0|0|0|0|0|0|0|0|0|0|0|0|0|6|0|0|0|0|0|6|0|0|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|13|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|6</HistCounts>
+      </HistItem>
+    </Histograms>
+    <Metadata>
+      <MDI key="STATISTICS_MAXIMUM">899</MDI>
+      <MDI key="STATISTICS_MEAN">865.86666666667</MDI>
+      <MDI key="STATISTICS_MINIMUM">826</MDI>
+      <MDI key="STATISTICS_STDDEV">17.808206597584</MDI>
+    </Metadata>
+  </PAMRasterBand>
+</PAMDataset>

python/plugins/processing/tests/testdata/expected/otb/raster_bandmath.tif.aux.xml

@@ -0,0 +1,10 @@
+<PAMDataset>
+  <PAMRasterBand band="1">
+    <Metadata>
+      <MDI key="STATISTICS_MAXIMUM">255</MDI>
+      <MDI key="STATISTICS_MEAN">4.5535714285714</MDI>
+      <MDI key="STATISTICS_MINIMUM">0</MDI>
+      <MDI key="STATISTICS_STDDEV">33.770189539453</MDI>
+    </Metadata>
+  </PAMRasterBand>
+</PAMDataset>

python/plugins/processing/tests/testdata/otb_algorithm_tests.yaml

@@ -0,0 +1,18 @@
+# See ../README.md for a description of the file format
+
+tests:
+  - algorithm: otb:bandmath
+    name: Test (otb:bandmath)
+    params:
+      !!python/unicode '-exp': im1b1==826?255:0
+      !!python/unicode '-il':
+        params:
+        - name: raster.tif
+          type: raster
+        type: multi
+      !!python/unicode '-ram': 128
+    results:
+      !!python/unicode '-out':
+        hash: a8acb8da3cf40a156fe26f815588a7cbf8f3c8f6b3c226968b1eab1e
+        type: rasterhash
+