Adds utilities that allow text comparison of bindings.

This is unused in this branch.  Just preparation for upcoming branches
that will feature tests.

1 files changed, 58 insertions, 0 deletions

diff --git a/tests/util.rs b/tests/util.rs
new file mode 100644
index 00000000..360fbb8d
--- /dev/null
+++ b/tests/util.rs
@@ -0,0 +1,58 @@
+extern crate bindgen;
+extern crate regex;
+extern crate syntax;
+
+use bindgen::{Logger, BindgenOptions};
+use regex::Regex;
+use std::default::Default;
+use syntax::ast;
+use syntax::codemap::DUMMY_SP;
+use syntax::print::pp;
+use syntax::print::pprust;
+use syntax::ptr::P;
+
+struct TestLogger;
+
+impl Logger for TestLogger {
+    fn error(&self, msg: &str) {
+        println!("err:  {}", msg);
+    }
+
+    fn warn(&self, msg: &str) {
+        println!("warn: {}", msg);
+    }
+}
+
+pub fn generate_bindings(filename: &str) -> Result<Vec<P<ast::Item>>, ()> {
+    let mut options:BindgenOptions = Default::default();
+    options.clang_args.push(filename.to_string());
+
+    let logger = TestLogger;
+    bindgen::generate_bindings(options, Some(&logger as &Logger), DUMMY_SP)
+}
+
+pub fn generate_unpretty_output(filename: &str) -> String {
+    let output = pprust::to_string(|s| {
+        // HACK: Replace the default printer with a very wide printer.  This
+        //       makes it easier to reason about how the unpretty'd output
+        //       will look, at the cost of tying us to the implementation
+        //       details of pprust::to_string.
+        s.s = pp::mk_printer(box Vec::new(), 4096);
+
+        let items = generate_bindings(filename).unwrap();
+
+        let module = ast::Mod {
+            inner: DUMMY_SP,
+            view_items: Vec::new(),
+            items: items,
+        };
+        s.print_mod(&module, &[])
+    });
+
+    unpretty(output.as_slice())
+}
+
+pub fn unpretty(s: &str) -> String {
+    let re = Regex::new(r"\s+").unwrap();
+    re.replace_all(s, " ")
+}