Fix travis tests

.travis.yml

@@ -6,8 +6,16 @@ rust:
 matrix:
   allow_failures:
     - rust: nightly
+env:
+  matrix:
+    - OPTIONAL=true
+    - OPTIONAL=false
 script:
-  - cargo build --verbose
+  - if [[ "$OPTIONAL" ]]; then
+    cargo build --features 'datasets' --verbose;
+  else
+    cargo build --verbose;
+  fi
   - cargo test --verbose
   - cargo build --features stats
   - cargo test --features stats

Cargo.toml

@@ -11,10 +11,10 @@ readme = "README.md"
 license = "MIT"
 
 [features]
-default = ["datasets"]
+default = []
 stats = []
 datasets = []
-test = ["datasets"]
+test = []
 
 [dependencies]
 num = { version = "0.1.35", default-features = false }

tests/datasets.rs

@@ -1,13 +1,18 @@
 extern crate rusty_machine as rm;
 
-use rm::datasets;
-use rm::linalg::BaseMatrix;
 
-#[test]
-fn test_iris() {
-    let dt = datasets::load_iris();
-    assert_eq!(dt.data().rows(), 150);
-    assert_eq!(dt.data().cols(), 4);
+#[cfg(datasets)]
+mod test {
 
-    assert_eq!(dt.target().size(), 150);
+    use rm::datasets;
+    use rm::linalg::BaseMatrix;
+
+    #[test]
+    fn test_iris() {
+        let dt = datasets::load_iris();
+        assert_eq!(dt.data().rows(), 150);
+        assert_eq!(dt.data().cols(), 4);
+
+        assert_eq!(dt.target().size(), 150);
+    }
 }

tests/lib.rs

@@ -12,5 +12,5 @@ pub mod learning {
     }
 }
 
-#[cfg(feature = "datasets")]
+#[cfg(datasets)]
 pub mod datasets;