add XML integration test

Author: SimonBaeumer

README.md

@@ -98,7 +98,7 @@ tests:
             lines: # Assert specific lines
                 1: "/bin/sh: 1: invalid: not found"
             json:
-                .object.attr: hello # Make assertions on json objects
+                object.attr: hello # Make assertions on json objects
             xml:
                 "//book//auhtor": Steven King # Make assertions on xml documents
         exit-code: 127

commander_unix.yaml

@@ -12,7 +12,7 @@ tests:
     stdout:
       contains:
         - ✓ it should exit with error code
-      line-count: 26
+      line-count: 15
     exit-code: 0
 
   it should assert that commander will fail:

integration/unix/_fixtures/book.xml

@@ -0,0 +1,10 @@
+<books>
+    <book>
+        <author>J. R. R. Tolkien</author>
+        <title>Lord of the Rngs</title>
+    </book>
+    <book>
+        <author>Joanne K. Rowling</author>
+        <title>Harry Potter</title>
+    </book>
+</books>

integration/unix/commander_test.yaml

@@ -49,4 +49,12 @@ tests:
     command: cat ./integration/unix/_fixtures/book.json
     stdout:
       json:
-        books.0.author: J. R. R. Tolkien
+        books.0.author: J. R. R. Tolkien
+        books.1.author: Joanne K. Rowling
+
+  it should assert xml:
+    command: cat ./integration/unix/_fixtures/book.xml
+    stdout:
+      xml:
+        /books/0/author: J. R. R. Tokien
+        /books/1/author: Joanne K. Rowling

pkg/suite/yaml_suite.go

@@ -179,6 +179,7 @@ func (y *YAMLConfig) convertToExpectedOut(value interface{}) runtime.ExpectedOut
 				"line-count",
 				"lines",
 				"json",
+				"xml",
 				"not-contains":
 				break
 			default: