r.texture: added tests, thanks to Sunveer Singh during Google Code-in 2017

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72070 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.texture/testsuite/test_texture.py

@@ -0,0 +1,75 @@
+"""
+Name:       r.texture test
+Purpose:    Tests r.texture and its flags/options.
+	
+Author:     Sunveer Singh, Google Code-in 2017
+Copyright:  (C) 2017 by Sunveer Singh and the GRASS Development Team
+Licence:    This program is free software under the GNU General Public
+	            License (>=v2). Read the file COPYING that comes with GRASS
+	            for details.
+"""
+from grass.gunittest.case import TestCase
+class TestRasterreport(TestCase):
+    input = "lsat7_2002_80"
+   
+    @classmethod
+    def setUpClass(cls):
+        cls.use_temp_region()
+        cls.runModule("g.region", raster=cls.input)
+	
+    @classmethod
+    def tearDownClass(cls): 
+        cls.del_temp_region()
+        cls.runModule('g.remove', flags='f', type='raster', name="asm_ASM")
+        cls.runModule('g.remove', flags='f', type='raster', name='corr_Corr')
+        cls.runModule('g.remove', flags='f', type='raster', name='sa_SA')
+        cls.runModule('g.remove', flags='f', type='raster', name='var_Var')
+        cls.runModule('g.remove', flags='f', type='raster', name='idm_IDM')
+        
+    def test_asm(self):
+        """Testing method asm"""
+        asm_ASM='asm_ASM'
+        string="""min=1
+        max=1
+        cells=1000246"""
+        self.assertModule('r.texture', input=self.input, output='asm', method='asm')
+        self.assertRasterFitsUnivar(asm_ASM,
+	                            reference=string, precision=2)
+
+    def test_corr(self):
+        """Testing method corr"""
+        corr_output='corr_Corr'
+        string="""min=1
+        max=1
+        cells=1000246"""
+        self.assertModule('r.texture', input=self.input, output='corr', method='corr')
+        self.assertRasterFitsUnivar(corr_output,
+	                            reference=string, precision=2)
+
+    def test_sa(self):
+        """Testing method sa"""
+        sa_SA='sa_SA'
+        string="""min=95.95
+        max=2942.79
+        cells=1000246"""
+        self.assertModule('r.texture', input=self.input, output='sa', method='sa')
+        self.assertRasterFitsUnivar(sa_SA,
+	                            reference=string, precision=2)
+
+    def test_var(self):
+        """Testing method var"""
+        var_output='var_Var'
+        self.assertModule('r.texture', input=self.input, output='var', method='var')
+        self.assertRasterMinMax(map=var_output, refmin=0, refmax=9843.07,
+	                        msg="var_Var in degrees must be between 0.74 and 9843.07")
+
+    def test_idm(self):
+        """Testing method idm"""
+        idm_IDM='idm_IDM'
+        self.assertModule('r.texture', input=self.input, output='idm', method='idm')
+        self.assertRasterMinMax(map=idm_IDM, refmin=0, refmax=9843.07,
+	                        msg="idm_IDM_IDM in degrees must be between 0.74 and 9843.07")
+      
+if __name__ == '__main__':
+    from grass.gunittest.main import test
+    test()