Test keys set to empty strings

editorconfig/editorconfig#496

parser/CMakeLists.txt

@@ -70,6 +70,10 @@ new_ec_test(spaces_after_section_name whitespace.in test9.c "^key=value[ \t\n\r]
 new_ec_test_multiline(spaces_before_middle_property_ML whitespace.in test10.c
  "key1=value1[ \t]*[\n\r]+key2=value2[ \t]*[\n\r]+key3=value3[ \t\n\r]*")
 
+# value with whitespace inside and the leading and trailing ws ignored
+new_ec_test(value_with_whitespace_inside whitespace.in test11.c
+ "^key=value with whitespace inside[\n\r]+$")
+
 # Tests for comment parsing
 
 # test comments ignored before properties
@@ -129,3 +133,6 @@ new_ec_test(empty_editorconfig_file empty.in test4 "^[ \t\n\r]*$")
 new_ec_test(newlines_only_editorconfig_file newlines_only.in test4 "^[ \t\n\r]*$")
 new_ec_test(comments_only_editorconfig_file comments_only.in test4 "^[ \t\n\r]*$")
 new_ec_test(comments_and_newlines_editorconfig_file comments_and_newlines.in test4 "^[ \t\n\r]*$")
+
+# A key set to empty string
+new_ec_test(key_set_to_empty_string empty_values.in test1 "^key1=[\n\r]*key2=[\n\r]*key3=[\n\r]+$")

parser/empty_values.in

@@ -0,0 +1,9 @@
+root = true
+
+[test1]
+; A key set to empty string
+key1=
+; Whitespace after equals sign is ignored
+key2= 
+; A file final key set to empty string
+key3=

parser/whitespace.in

@@ -46,3 +46,7 @@ key=value
 key1=value1
  key2=value2
 key3=value3
+
+; value with whitespace inside and the leading and trailing ws ignored
+[test11.c]
+key= value with whitespace inside