[procesing] add tests for raster terrain analysis algorithms

Author: alexbruy

python/plugins/processing/tests/testdata/dem.tif

@@ -1021,3 +1021,65 @@ tests:
       OUTPUT:
         name: expected/points_in_polys.gml
         type: vector
+
+  - algorithm: qgis:aspect
+    name: Aspect from QGIS analysis library
+    params:
+      INPUT_LAYER:
+        name: dem.tif
+        type: raster
+      Z_FACTOR: 1.0
+    results:
+      OUTPUT_LAYER:
+        hash: 762865ee485a6736d188402aa10e6fd38a812a9e45a7dd2d4885a63a
+        type: rasterhash
+
+  - algorithm: qgis:slope
+    name: Slope from QGIS analysis library
+    params:
+      INPUT_LAYER:
+        name: dem.tif
+        type: raster
+      Z_FACTOR: 1.0
+    results:
+      OUTPUT_LAYER:
+        hash: 151ea76a21b286c16567eb6b4b692925a84145b65561a0017effb1a1
+        type: rasterhash
+
+  - algorithm: qgis:ruggednessindex
+    name: Ruggedness index from QGIS analysis library
+    params:
+      INPUT_LAYER:
+        name: dem.tif
+        type: raster
+      Z_FACTOR: 1.0
+    results:
+      OUTPUT_LAYER:
+        hash: ff630246e8dc19c7217d81261c6b64f965c17fa04d3e41d7979c1f1e
+        type: rasterhash
+
+  - algorithm: qgis:hillshade
+    name: Hillshade from QGIS analysis library
+    params:
+      AZIMUTH: 300.0
+      INPUT_LAYER:
+        name: dem.tif
+        type: raster
+      V_ANGLE: 40.0
+      Z_FACTOR: 1.0
+    results:
+      OUTPUT_LAYER:
+        hash: 58365b3715b925d6286e7f082ebd9c2a20f09fa1c922176d3f238002
+        type: rasterhash
+
+  - algorithm: qgis:reliefautomaticcolors
+    name: Relief (automatic colors calculation)
+    params:
+      INPUT_LAYER:
+        name: dem.tif
+        type: raster
+      Z_FACTOR: 1.0
+    results:
+      OUTPUT_LAYER:
+        hash: 7fe0e0174185fd743e23760f33615adf10f771b4275f320db6f7f4f8
+        type: rasterhash