diff --git a/pestfoamtest/src/foam.pest b/pestfoamtest/src/foam.pest
index 2ecdbd1..fbeb306 100644
--- a/pestfoamtest/src/foam.pest
+++ b/pestfoamtest/src/foam.pest
@@ -1,4 +1,15 @@
+whitespace = _{ " " | "\t" | "\r" | "\n" }
 multi_comment = { "/*" ~ (!"*/" ~ ANY)* ~ "*/" }
 single_comment = { "//" ~ (!NEWLINE ~ ANY)* }
+identifier = { ASCII_ALPHA+ ~ (ASCII_ALPHA | ASCII_DIGIT | "_")* }
+rvalue = { (!";" ~ ANY)+ }
+attribution = { identifier ~ whitespace+ ~ rvalue ~ ";" }
+dictionary = { identifier ~ whitespace+ ~ "{" ~ (dictionary | attribution | whitespace)+ ~ "}" }
 
-field = { (ASCII_DIGIT | "." | "-")+ }
+file = { SOI ~ (
+	whitespace 
+	| multi_comment 
+	| single_comment 
+	| dictionary
+	| attribution)* 
+	~ EOI }
diff --git a/pestfoamtest/src/lib.rs b/pestfoamtest/src/lib.rs
new file mode 100644
index 0000000..a88819e
--- /dev/null
+++ b/pestfoamtest/src/lib.rs
@@ -0,0 +1,90 @@
+//! Parse a Foam file into a major structure.
+
+use pest_derive::Parser;
+
+#[derive(Parser)]
+#[grammar = "foam.pest"]
+pub struct Foam;
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use pest::Parser;
+
+    #[test]
+    fn multi_comment() {
+        let parse = Foam::parse(Rule::multi_comment, "/* this is comment */");
+        assert!(parse.is_ok());
+    }
+
+    #[test]
+    fn broken_multi() {
+        let parse = Foam::parse(Rule::multi_comment, "/* bad comment");
+        assert!(parse.is_err());
+    }
+
+    #[test]
+    fn single_comment() {
+        let parse = Foam::parse(Rule::single_comment, "// this is comment");
+        assert!(parse.is_ok());
+    }
+
+    #[test]
+    fn chained_comments() {
+        let text = "/* this is one comment */
+// And this is another";
+        let parse = Foam::parse(Rule::file, text);
+        assert!(parse.is_ok(), "{:?}", parse);
+    }
+
+    #[test]
+    fn identifier() {
+        let parse = Foam::parse(Rule::identifier, "FoamFile");
+        assert!(parse.is_ok());
+        let parse = Foam::parse(Rule::identifier, "foam_file");
+        assert!(parse.is_ok());
+    }
+
+    #[test]
+    fn broken_identifer() {
+        let parse = Foam::parse(Rule::identifier, "123");
+        assert!(parse.is_err());
+
+        let parse = Foam::parse(Rule::identifier, "asd ");
+        assert!(parse.is_ok(), "{:?}", parse);
+        // XXX check if the identifier lost its space.
+    }
+
+    #[test]
+    fn attribution() {
+        let parse = Foam::parse(Rule::attribution, "version 2.0;");
+        assert!(parse.is_ok(), "{:?}", parse);
+    }
+
+    #[test]
+    fn broken_attribution() {
+        let parse = Foam::parse(Rule::attribution, "version 2.0");
+        assert!(parse.is_err(), "{:?}", parse);
+    }
+
+    #[test]
+    fn dictionary() {
+        let text = "FoamFile
+{
+    version 2.0;
+    format ascii;
+    class dictionary;
+    location system;
+    object caseSetupDict;
+}";
+        let parse = Foam::parse(Rule::dictionary, text);
+        assert!(parse.is_ok(), "{:#?}", parse);
+    }
+
+    #[test]
+    fn dict_in_dict() {
+        let text = "dict1 { dict2 { class bad; } }";
+        let parse = Foam::parse(Rule::dictionary, text);
+        assert!(parse.is_err(), "{:#?}", parse);
+    }
+}
diff --git a/pestfoamtest/src/main.rs b/pestfoamtest/src/main.rs
deleted file mode 100644
index c8b571b..0000000
--- a/pestfoamtest/src/main.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-use pest::Parser;
-use pest_derive::Parser;
-
-#[derive(Parser)]
-#[grammar = "foam.pest"]
-pub struct Foam;
-
-fn main() {
-    let parse = Foam::parse(Rule::multi_comment, "/* this is comment */");
-    println!("{:?}", parse);
-    let parse = Foam::parse(Rule::single_comment, "// this is comment");
-    println!("{:?}", parse);
-    let parse = Foam::parse(Rule::field, "-273.15");
-    println!("{:?}", parse);
-}