Add test for include conversion.

dub.json

@@ -27,6 +27,7 @@
             "name": "test",
             "mainSourceFile": "test.d",
             "targetName": "test",
+            "lflags-posix": ["-lz"],
             "excludedSourceFiles": ["dstep/*", "clang/*"]
         }
     ],

features/include_conversion.feature

@@ -0,0 +1,5 @@
+Feature: Include Conversion
+
+  Scenario: Convert includes
+    Then I test the file "includes" with filter "dummy_includes/transform.*" and prefix "transformed."
+

features/step_definitions/common.rb

@@ -50,6 +50,13 @@
   step %{the files "#{file}.d" and "test_files/#{path}/#{file}.d" should be equal}
 end
 
+Then /^I test the file "([^"]*)" with filter "([^"]*)" and prefix "([^"]*)"$/ do |file, filter, prefix|
+    step %{a test file named "#{file}"}
+    step %{an expected file named "#{file}"}
+    step %{I successfully convert the test file "#{file}" in "" with the flags "--import-filter #{filter} --import-prefix #{prefix}"}
+    step %{the files "#{file}.d" and "test_files/#{file}.d" should be equal}
+end
+
 if OSX
   Then /^I test the Objective\-C file "([^"]*)" in "([^"]*)"$/ do |file, path|
     step %{a test file named "#{file}" in "#{path}"}

test_files/dummy_includes/README.md

@@ -0,0 +1,8 @@
+Directory dummy_includes
+========================
+Clang gets angry about non-existent includes,
+so to test include transformation, we have dummy
+files to be included here.
+
+(Other test files cannot be used because they need
+to be free to contain name conflicts.)

test_files/dummy_includes/ignored.h

@@ -0,0 +1 @@
+struct Ignored{};

test_files/dummy_includes/transform.h

@@ -0,0 +1 @@
+struct Transform{};

test_files/dummy_includes/transform_also.h

@@ -0,0 +1 @@
+struct TransformAlso{};

test_files/includes.d

@@ -0,0 +1,5 @@
+import transformed.transform;
+import transformed.transform_also;
+
+extern (C):
+

test_files/includes.h

@@ -0,0 +1,10 @@
+#include "dummy_includes/transform.h"
+#include "dummy_includes/ignored.h"
+#include "dummy_includes/transform_also.h"
+
+// Dstep only pays attention to includes whose types are used so we
+// use a type from each here.
+struct Transform transform;
+struct Ignored ignored;
+struct TransformAlso transform_also;
+