Allow running tests with --no-default-features (#77)

.github/workflows/ci.yml

@@ -32,6 +32,24 @@ jobs:
       - name: Run tests
         run: cargo test --verbose
 
+  test_no_default_features:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.rust }}
+      - name: Build
+        run: cargo build --no-default-features --verbose
+      - name: Run tests
+        run: cargo test --no-default-features --verbose
+
   # We have to test the MSRV without the zip crate, since the zip crate has a higher MSRV and
   # doesn't consider a MSRV update to be a breaking change.
   test_msrv:

tests/integration/examples.rs

@@ -7,6 +7,7 @@ use ndarray_npy::{
     write_zeroed_npy, ReadNpyError, ReadNpyExt, ViewMutNpyExt, ViewNpyError, ViewNpyExt,
     WriteNpyExt,
 };
+#[cfg(feature = "num-complex-0_4")]
 use num_complex_0_4::Complex;
 use std::fs::{self, File};
 use std::io::{Read, Seek, SeekFrom, Write};
@@ -29,6 +30,7 @@ fn write_f64_standard() {
     assert_eq!(&correct, &writer);
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn write_c64_standard() {
     #[cfg(target_endian = "little")]
@@ -65,6 +67,7 @@ fn write_f64_fortran() {
     assert_eq!(&correct[..], &writer[..]);
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn write_c64_fortran() {
     #[cfg(target_endian = "little")]
@@ -103,6 +106,7 @@ fn write_f64_discontiguous() {
     assert_eq!(&correct, &writer);
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn write_c64_discontiguous() {
     #[cfg(target_endian = "little")]
@@ -141,6 +145,7 @@ fn read_f64_standard() {
     }
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn read_c64_standard() {
     let mut correct = Array3::<Complex<f64>>::zeros((2, 3, 4));
@@ -175,6 +180,7 @@ fn read_f64_fortran() {
     }
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn read_c64_fortran() {
     let mut correct = Array3::<Complex<f64>>::zeros((2, 3, 4).f());
@@ -230,6 +236,7 @@ fn view_f64_standard() {
     assert!(view.is_standard_layout());
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn view_c64_standard() {
     #[cfg(target_endian = "little")]
@@ -266,6 +273,7 @@ fn view_f64_fortran() {
     assert!(view.t().is_standard_layout());
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn view_c64_fortran() {
     #[cfg(target_endian = "little")]

tests/integration/round_trip.rs

@@ -7,6 +7,7 @@ use ndarray_npy::{
     ReadNpyExt, ReadableElement, ViewElement, ViewMutElement, ViewMutNpyExt, ViewNpyExt,
     WritableElement, WriteNpyExt,
 };
+#[cfg(feature = "num-complex-0_4")]
 use num_complex_0_4::Complex;
 use std::fmt::Debug;
 use std::mem;
@@ -149,6 +150,7 @@ fn round_trip_f64() {
     );
 }
 
+#[cfg(feature = "num-complex-0_4")]
 #[test]
 fn round_trip_c32() {
     test_round_trip_multiple_layouts(