Syntax highlighting for processing tests readme

python/plugins/processing/tests/README.md

@@ -7,15 +7,17 @@ This file is structured with [yaml syntax](http://www.yaml.org/start.html).
 
 A basic test appears under the toplevel key `tests` and looks like this:
 
-    - name: centroid
+```yaml
-      algorithm: qgis:polygoncentroids
+- name: centroid
-      params:
+  algorithm: qgis:polygoncentroids
-        - type: vector
+  params:
-          name: polys.gml
+    - type: vector
-      results:
+      name: polys.gml
-        OUTPUT_LAYER:
+  results:
-          type: vector
+    OUTPUT_LAYER:
-          name: expected/polys_centroid.gml
+      type: vector
+      name: expected/polys_centroid.gml
+```
 
 How To
 ------
@@ -39,16 +41,18 @@ ones to params and the last one(s) to results.
 
 The above translates to
 
-    - name: densify
+```yaml
-      algorithm: qgis:densifygeometriesgivenaninterval
+- name: densify
-      params:
+  algorithm: qgis:densifygeometriesgivenaninterval
-        - type: vector
+  params:
-          name: polys.gml
+    - type: vector
-        - 2 # Interval
+      name: polys.gml
-      results:
+    - 2 # Interval
-        OUTPUT:
+  results:
-          type: vector
+    OUTPUT:
-          name: expected/polys_densify.gml
+      type: vector
+      name: expected/polys_densify.gml
+```
 
 Params and results
 ------------------
@@ -57,17 +61,21 @@ Params and results
 
 Params and results are specified as lists or dictionaries:
 
-    params:
+```yaml
-      INTERVAL: 5
+params:
-      INTERPOLATE: True
+  INTERVAL: 5
-      NAME: A processing test
+  INTERPOLATE: True
-      
+  NAME: A processing test
+```
+
 or
 
-    params:
+```yaml
-      - 2
+params:
-      - string
+  - 2
-      - another param
+  - string
+  - another param
+```
 
 ### Layer type parameters
 
@@ -80,13 +88,15 @@ You will often need to specify layers as parameters. To specify a layer you will
 
 This is what it looks like in action:
 
-    params:
+```yaml
-      PAR: 2
+params:
-      STR: string
+  PAR: 2
-      LAYER:
+  STR: string
-        type: vector
+  LAYER:
-        name: polys.gml
+    type: vector
-      OTHER: another param
+    name: polys.gml
+  OTHER: another param
+```
 
 ### Results
 
@@ -96,9 +106,11 @@ Results are specified very similar.
 
 It couldn't be more trivial
 
+```yaml
     OUTPUT:
       name: expected/qgis_intersection.gml
       type: vector
+```
 
 #### Vector with tolerance
 
@@ -114,41 +126,49 @@ field name `__all__` which will apply a certain tolerance to all fields.
 There is another property `geometry`  which also accepts a `precision` which is
 applied to each vertex.
 
-    OUTPUT:
+```yaml
-      type: vector
+OUTPUT:
-      name: expected/abcd.gml
+  type: vector
-      compare:
+  name: expected/abcd.gml
-        fields:
+  compare:
-          __all__:
+    fields:
-            precision: 5 # compare to a precision of .00001 on all fields
+      __all__:
-          A: skip # skip field A
+        precision: 5 # compare to a precision of .00001 on all fields
-        geometry:
+      A: skip # skip field A
-          precision: 5 # compare coordinates with a precision of 5 digits
+    geometry:
+      precision: 5 # compare coordinates with a precision of 5 digits
+```
 
 #### Raster files
 
 Raster files are compared with a hash checksum. This is calculated when you create
 a test from the processing history.
 
-    OUTPUT:
+```yaml
-      type: rasterhash
+OUTPUT:
-      hash: f1fedeb6782f9389cf43590d4c85ada9155ab61fef6dc285aaeb54d6
+  type: rasterhash
+  hash: f1fedeb6782f9389cf43590d4c85ada9155ab61fef6dc285aaeb54d6
+```
       
 #### Files
 
 You can compare the content of an ouptut file by an expected result reference file
 
-    OUTPUT_HTML_FILE:
+```yaml
-      name: expected/basic_statistics_string.html
+OUTPUT_HTML_FILE:
-      type: file
+  name: expected/basic_statistics_string.html
+  type: file
+```
 
 Or you can use one or more regular expressions that will be [matched](https://docs.python.org/2/library/re.html#re.search) against the file
 content
 
-    OUTPUT:
+```yaml
-      name: layer_info.html
+OUTPUT:
-      type: regex
+  name: layer_info.html
-      rules:
+  type: regex
-        - 'Extent: \(-1.000000, -3.000000\) - \(11.000000, 5.000000\)'
+  rules:
-        - 'Geometry: Line String'
+    - 'Extent: \(-1.000000, -3.000000\) - \(11.000000, 5.000000\)'
-        - 'Feature Count: 6'
+    - 'Geometry: Line String'
+    - 'Feature Count: 6'
+```