core: irrt improve test_ndarray_subscript

- rewrote some comments
- add test_ndsubscript_index_subscript_out_of_bounds

nac3core/irrt/test/test_ndarray_subscript.hpp

@@ -27,6 +27,7 @@ namespace test { namespace ndarray_subscript {
         */
         BEGIN_TEST();
 
+        // Prepare src_ndarray
         double src_data[12] = { 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0 };
         int32_t src_itemsize = sizeof(double);
         const int32_t src_ndims = 2;
@@ -41,8 +42,7 @@ namespace test { namespace ndarray_subscript {
         };
         ndarray::basic::set_strides_by_shape(&src_ndarray);
 
-        // Destination ndarray
+        // Prepare dst_ndarray
-        // As documented, ndims and shape & strides must be allocated and determined by the caller.
         const int32_t dst_ndims = 2;
         int32_t dst_shape[dst_ndims] = {999, 999}; // Empty values
         int32_t dst_strides[dst_ndims] = {999, 999}; // Empty values
@@ -53,7 +53,7 @@ namespace test { namespace ndarray_subscript {
             .strides = dst_strides
         };
 
-        // Create the slice in `ndarray[-2::, 1::2]`
+        // Create the subscripts in `ndarray[-2::, 1::2]`
         UserSlice subscript_1;
         subscript_1.set_start(-2);
 
@@ -118,6 +118,7 @@ namespace test { namespace ndarray_subscript {
         */
         BEGIN_TEST();
 
+        // Prepare src_ndarray
         double src_data[12] = { 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0 };
         int32_t src_itemsize = sizeof(double);
         const int32_t src_ndims = 2;
@@ -132,8 +133,7 @@ namespace test { namespace ndarray_subscript {
         };
         ndarray::basic::set_strides_by_shape(&src_ndarray);
 
-        // Destination ndarray
+        // Prepare dst_ndarray
-        // As documented, ndims and shape & strides must be allocated and determined by the caller.
         const int32_t dst_ndims = 1;
         int32_t dst_shape[dst_ndims] = {999}; // Empty values
         int32_t dst_strides[dst_ndims] = {999}; // Empty values
@@ -144,7 +144,7 @@ namespace test { namespace ndarray_subscript {
             .strides = dst_strides
         };
 
-        // Create the slice in `ndarray[2, ::-2]`
+        // Create the subscripts in `ndarray[2, ::-2]`
         int32_t subscript_1 = 2;
 
         UserSlice subscript_2;
@@ -175,8 +175,59 @@ namespace test { namespace ndarray_subscript {
         );
     }
 
+    void test_ndsubscript_index_subscript_out_of_bounds() {
+        /*
+            # Consider `my_array`
+
+            print(my_array.shape)
+            # (4, 5, 6)
+
+            my_array[2, 100] # error, index subscript at axis 1 is out of bounds
+        */
+        BEGIN_TEST();
+
+        // Prepare src_ndarray
+        const int32_t src_ndims = 2;
+        int32_t src_shape[src_ndims] = { 3, 4 };
+        int32_t src_strides[src_ndims] = {};
+        NDArray<int32_t> src_ndarray = {
+            .data = (uint8_t*) nullptr, // placeholder, we wouldn't access it
+            .itemsize = sizeof(double), // placeholder
+            .ndims = src_ndims,
+            .shape = src_shape,
+            .strides = src_strides
+        };
+        ndarray::basic::set_strides_by_shape(&src_ndarray);
+
+        // Create the subscripts in `my_array[2, 100]`
+        int32_t subscript_1 = 2;
+        int32_t subscript_2 = 100;
+
+        const int32_t num_ndsubscripts = 2;
+        NDSubscript ndsubscripts[num_ndsubscripts] = {
+            { .type = INPUT_SUBSCRIPT_TYPE_INDEX, .data = (uint8_t*) &subscript_1 },
+            { .type = INPUT_SUBSCRIPT_TYPE_INDEX, .data = (uint8_t*) &subscript_2 }
+        };
+
+        // Prepare dst_ndarray
+        const int32_t dst_ndims = 0;
+        int32_t dst_shape[dst_ndims] = {};
+        int32_t dst_strides[dst_ndims] = {};
+        NDArray<int32_t> dst_ndarray = {
+            .data = nullptr, // placehloder
+            .ndims = dst_ndims,
+            .shape = dst_shape,
+            .strides = dst_strides
+        };
+
+        ErrorContext errctx = create_testing_errctx();
+        ndarray::subscript::subscript(&errctx, num_ndsubscripts, ndsubscripts, &src_ndarray, &dst_ndarray);
+        assert_errctx_has_error(&errctx, errctx.error_ids->index_error);
+    }
+
     void run() {
         test_ndsubscript_normal_1();
         test_ndsubscript_normal_2();
+        test_ndsubscript_index_subscript_out_of_bounds();
     }
 } }