Add dotenv for testing

.example.env

@@ -0,0 +1 @@
+DATABASE_URL=postgresql://localhost/yaqb_test

.gitignore

@@ -1,2 +1,3 @@
 target
 Cargo.lock
+.env

Cargo.toml

@@ -11,6 +11,7 @@ byteorder = "0.3.*"
 [dev-dependencies]
 compiletest_rs = "*"
 quickcheck = "*"
+dotenv = "0.4.0"
 
 [[test]]
 name = "compile_tests"

src/expression/extensions/interval_dsl.rs

@@ -111,6 +111,7 @@ impl DayAndMonthIntervalDsl for f64 {
 
 #[cfg(test)]
 mod tests {
+    extern crate dotenv;
     extern crate quickcheck;
     use self::quickcheck::quickcheck;
     use super::*;
@@ -121,6 +122,7 @@ mod tests {
     macro_rules! test_fn {
         ($tpe:ty, $test_name:ident, $units:ident) => {
             fn $test_name(val: $tpe) -> bool {
+                dotenv::dotenv().ok();
                 let connection_url = ::std::env::var("DATABASE_URL").ok()
                     .expect("DATABASE_URL must be set in order to run tests");
                 let connection = Connection::establish(&connection_url).unwrap();

tests/schema.rs

@@ -1,4 +1,5 @@
 use yaqb::*;
+extern crate dotenv;
 
 #[derive(PartialEq, Eq, Debug, Clone)]
 pub struct User {
@@ -170,6 +171,7 @@ pub fn connection() -> Connection {
 }
 
 pub fn connection_without_transaction() -> Connection {
+    dotenv::dotenv().ok();
     let connection_url = ::std::env::var("DATABASE_URL").ok()
         .expect("DATABASE_URL must be set in order to run tests");
     Connection::establish(&connection_url).unwrap()