Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..96ef6c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+Cargo.lock

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644 (file)
index 0000000..28a26f5
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+members = [
+    "lib",
+    "derive-macro",
+    "tests",
+]

diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644 (file)
index 0000000..16fe87b
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
+   Object form, made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work
+   (an example is provided in the Appendix below).
+
+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
+   separable from, or merely link (or bind by name) to the interfaces of,
+   the Work and Derivative Works thereof.
+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
+   to that Work or Derivative Works thereof, that is intentionally
+   submitted to Licensor for inclusion in the Work by the copyright owner
+   or by an individual or Legal Entity authorized to submit on behalf of
+   the copyright owner. For the purposes of this definition, "submitted"
+   means any form of electronic, verbal, or written communication sent
+   to the Licensor or its representatives, including but not limited to
+   communication on electronic mailing lists, source code control systems,
+   and issue tracking systems that are managed by, or on behalf of, the
+   Licensor for the purpose of discussing and improving the Work, but
+   excluding communication that is conspicuously marked or otherwise
+   designated in writing by the copyright owner as "Not a Contribution."
+
+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
+   subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   copyright license to reproduce, prepare Derivative Works of,
+   publicly display, publicly perform, sublicense, and distribute the
+   Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   (except as stated in this section) patent license to make, have made,
+   use, offer to sell, sell, import, and otherwise transfer the Work,
+   where such license applies only to those patent claims licensable
+   by such Contributor that are necessarily infringed by their
+   Contribution(s) alone or by combination of their Contribution(s)
+   with the Work to which such Contribution(s) was submitted. If You
+   institute patent litigation against any entity (including a
+   cross-claim or counterclaim in a lawsuit) alleging that the Work
+   or a Contribution incorporated within the Work constitutes direct
+   or contributory patent infringement, then any patent licenses
+   granted to You under this License for that Work shall terminate
+   as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+   Work or Derivative Works thereof in any medium, with or without
+   modifications, and in Source or Object form, provided that You
+   meet the following conditions:
+
+   (a) You must give any other recipients of the Work or
+       Derivative Works a copy of this License; and
+
+   (b) You must cause any modified files to carry prominent notices
+       stating that You changed the files; and
+
+   (c) You must retain, in the Source form of any Derivative Works
+       that You distribute, all copyright, patent, trademark, and
+       attribution notices from the Source form of the Work,
+       excluding those notices that do not pertain to any part of
+       the Derivative Works; and
+
+   (d) If the Work includes a "NOTICE" text file as part of its
+       distribution, then any Derivative Works that You distribute must
+       include a readable copy of the attribution notices contained
+       within such NOTICE file, excluding those notices that do not
+       pertain to any part of the Derivative Works, in at least one
+       of the following places: within a NOTICE text file distributed
+       as part of the Derivative Works; within the Source form or
+       documentation, if provided along with the Derivative Works; or,
+       within a display generated by the Derivative Works, if and
+       wherever such third-party notices normally appear. The contents
+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
+       that such additional attribution notices cannot be construed
+       as modifying the License.
+
+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
+   replaced with your own identifying information. (Don't include
+   the brackets!)  The text should be enclosed in the appropriate
+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
+   same "printed page" as the copyright notice for easier
+   identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644 (file)
index 0000000..83e9656
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,19 @@
+Copyright (c) 2016 Alexander van Ratingen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

diff --git a/README.md b/README.md
new file mode 100644 (file)
index 0000000..c2458ae
--- /dev/null
+++ b/README.md
@@ -0,0 +1,29 @@
+# Generate-Random
+
+Generate random data.
+
+## Example
+
+```rust
+use generate_random::GenerateRandom;
+
+#[derive(GenerateRandom)]
+enum MyEnum {
+    A,
+    C(bool),
+    B {
+        x: u8,
+    },
+    // Providing a weight allows changing the probabilities.
+    // This variant is now twice as likely to be generated as the others.
+    #[weight(2)]
+    D,
+}
+
+let mut rng = rand::thread_rng();
+let my_value = MyEnum::generate_random(&mut rng);
+```
+
+## Documentation
+
+[Documentation](https://lib.rs/crates/generate-random)

diff --git a/derive-macro/Cargo.toml b/derive-macro/Cargo.toml
new file mode 100644 (file)
index 0000000..24bfa19
--- /dev/null
+++ b/derive-macro/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "generate-random-macro"
+version = "0.1.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+authors = ["Alexander van Ratingen"]
+homepage = "https://github.com/alvra/generate-random"
+repository = "https://github.com/alvra/generate-random"
+documentation = "https://docs.rs/generate-random"
+description = "Generate random data"
+readme = "README.md"
+keywords = ["random"]
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0"
+syn = { version = "1.0", features = ["full", "extra-traits"] }
+quote = "1.0"
+proc_macro2_helper = "0.2"

diff --git a/derive-macro/src/handle_enum.rs b/derive-macro/src/handle_enum.rs
new file mode 100644 (file)
index 0000000..b2b14c0
--- /dev/null
+++ b/derive-macro/src/handle_enum.rs
@@ -0,0 +1,55 @@
+use proc_macro2::{Ident, Literal, TokenStream};
+use quote::quote;
+use syn::{DataEnum, Variant};
+use super::generate_fields;
+
+fn variant_weight(variant: &Variant) -> Literal {
+    for attr in variant.attrs.iter() {
+        if attr.path.is_ident("weight") {
+            return attr.parse_args::<Literal>().expect("expected literal for `#[weight(...)]`")
+        }
+    }
+    Literal::u64_suffixed(1)
+}
+
+pub fn generate(name: &Ident, ty: DataEnum) -> TokenStream {
+    let mut variant_weights = ty.variants.into_iter()
+        .map(|variant| (variant_weight(&variant), variant));
+
+    let mut arms = TokenStream::new();
+    let mut total_weight = quote! { 0 };
+    if let Some((weight, variant)) = variant_weights.next() {
+        let variant_name = variant.ident;
+        let fields = generate_fields(variant.fields);
+        arms.extend(quote! {
+            let end = #weight;
+            if 0 <= value && value < end {
+                return Self::#variant_name #fields
+            }
+        });
+        total_weight = quote! { #weight };
+        for (weight, variant) in variant_weights {
+            let variant_name = variant.ident;
+            let fields = generate_fields(variant.fields);
+            arms.extend(quote! {
+                let start = end;
+                let end = start + #weight;
+                if start <= value && value < end {
+                    return Self::#variant_name #fields
+                }
+            });
+            total_weight = quote! { #total_weight + #weight };
+        }
+    }
+
+    quote! {
+        impl generate_random::GenerateRandom for #name {
+            fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self {
+                let total_weight = #total_weight;
+                let value = rng.gen_range(0..total_weight);
+                #arms
+                unreachable!()
+            }
+        }
+    }
+}

diff --git a/derive-macro/src/handle_struct.rs b/derive-macro/src/handle_struct.rs
new file mode 100644 (file)
index 0000000..988bd06
--- /dev/null
+++ b/derive-macro/src/handle_struct.rs
@@ -0,0 +1,15 @@
+use proc_macro2::{Ident, TokenStream};
+use quote::quote;
+use syn::DataStruct;
+use super::generate_fields;
+
+pub fn generate(name: &Ident, ty: DataStruct) -> TokenStream {
+    let fields = generate_fields(ty.fields);
+    quote! {
+        impl generate_random::GenerateRandom for #name {
+            fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self {
+                Self #fields
+            }
+        }
+    }
+}

diff --git a/derive-macro/src/lib.rs b/derive-macro/src/lib.rs
new file mode 100644 (file)
index 0000000..9aa93f5
--- /dev/null
+++ b/derive-macro/src/lib.rs
@@ -0,0 +1,46 @@
+//! This crate provide the [`GenerateRandom`] derive macro
+//! that implements the trait of the same name from the `generate-random` crate.
+//! Refer to the documentation of that crate for more information.
+
+use syn::{DeriveInput, Data, Fields};
+
+mod handle_struct;
+mod handle_enum;
+
+#[proc_macro_derive(GenerateRandom, attributes(weight))]
+pub fn derive_generate_random(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let input: DeriveInput = syn::parse(input).unwrap();
+    match input.data {
+        Data::Struct(ty) => handle_struct::generate(&input.ident, ty),
+        Data::Enum(ty) => handle_enum::generate(&input.ident, ty),
+        Data::Union(_) => panic!("Unions are not supported"),
+    }.into()
+}
+
+fn generate_fields(fields: Fields) -> proc_macro2::TokenStream {
+    use quote::quote;
+    match fields {
+        Fields::Named(fields) => {
+            let fields = fields.named.into_iter()
+                .map(|field| {
+                    let field = field.ident.unwrap();
+                    quote! {
+                        #field: generate_random::GenerateRandom::generate_random(rng),
+                    }
+                })
+                .collect::<proc_macro2::TokenStream>();
+            quote! { { #fields } }
+        }
+        Fields::Unnamed(fields) => {
+            let fields = fields.unnamed.into_iter()
+                .map(|_field| {
+                    quote! {
+                        generate_random::GenerateRandom::generate_random(rng),
+                    }
+                })
+                .collect::<proc_macro2::TokenStream>();
+            quote! { ( #fields ) }
+        }
+        Fields::Unit => quote! {},
+    }
+}

diff --git a/lib/Cargo.toml b/lib/Cargo.toml
new file mode 100644 (file)
index 0000000..8050d42
--- /dev/null
+++ b/lib/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "generate-random"
+version = "0.1.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+authors = ["Alexander van Ratingen"]
+homepage = "https://github.com/alvra/generate-random"
+repository = "https://github.com/alvra/generate-random"
+documentation = "https://docs.rs/generate-random"
+description = "Generate random data"
+readme = "README.md"
+keywords = ["random"]
+
+[dependencies]
+rand = "0.8.5"
+generate-random-macro = { path = "../derive-macro" }
+
+[dev-dependencies]
+rand_chacha = "0.3.1"

diff --git a/lib/src/lib.rs b/lib/src/lib.rs
new file mode 100644 (file)
index 0000000..40f02e9
--- /dev/null
+++ b/lib/src/lib.rs
@@ -0,0 +1,130 @@
+//! Generate random data.
+//!
+//! # Examples
+//!
+//! ```
+//! use generate_random::GenerateRandom;
+//!
+//! #[derive(GenerateRandom)]
+//! enum MyEnum {
+//!     A,
+//!     C(bool),
+//!     B {
+//!         x: u8,
+//!     },
+//!     // Providing a weight allows changing the probabilities.
+//!     // This variant is now twice as likely to be generated as the others.
+//!     #[weight(2)]
+//!     D,
+//! }
+//!
+//! let mut rng = rand::thread_rng();
+//! let my_value = MyEnum::generate_random(&mut rng);
+//! ```
+
+/// This derive macro provides an implementation
+/// of the [`trait@GenerateRandom`] trait.
+///
+/// Enum variants can be given a `weight` attribute
+/// to change how often it is generated.
+/// By default, the weight is `1`.
+/// The probability of a variants is its weight
+/// divided by the sum over all variants.
+pub use generate_random_macro::GenerateRandom;
+
+/// Enable randomly generating values of a type.
+///
+/// This trait can be implemented using the derive
+/// macro of the same name: [`macro@GenerateRandom`].
+pub trait GenerateRandom {
+    /// Create a new random value of this type.
+    fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self;
+}
+
+macro_rules! impl_generate_random {
+    ( $( $t:ty, )+ ) => {
+        $(
+            impl GenerateRandom for $t {
+                fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self {
+                    rng.gen()
+                }
+            }
+        )+
+    }
+}
+
+impl_generate_random! {
+    bool,
+    char,
+    u8,
+    i8,
+    u16,
+    i16,
+    u32,
+    i32,
+    u64,
+    i64,
+    u128,
+    i128,
+    usize,
+    isize,
+    f32,
+    f64,
+}
+
+impl<T: GenerateRandom> GenerateRandom for Option<T> {
+    fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self {
+        if bool::generate_random(rng) {
+            Some(T::generate_random(rng))
+        } else {
+            None
+        }
+    }
+}
+
+macro_rules! impl_generate_random_tuple {
+    ( $t0:ident $( $t:ident )* ) => {
+        impl< $t0, $( $t, )* > GenerateRandom for ( $t0, $( $t, )* )
+        where
+            $t0: GenerateRandom,
+            $(
+                $t: GenerateRandom,
+            )*
+        {
+            fn generate_random<R: rand::Rng + ?Sized>(rng: &mut R) -> Self {
+                (
+                    $t0::generate_random(rng),
+                    $(
+                        $t::generate_random(rng),
+                    )*
+                )
+            }
+        }
+        impl_generate_random_tuple!( $( $t )* );
+    };
+    () => {
+        impl GenerateRandom for () {
+            fn generate_random<R: rand::Rng + ?Sized>(_rng: &mut R) -> Self {
+                ()
+            }
+        }
+    }
+}
+
+impl_generate_random_tuple!(A B C D E F G H I J K L);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn rng() -> impl rand::Rng {
+        use rand::SeedableRng;
+        rand_chacha::ChaCha8Rng::from(rand_chacha::ChaCha8Core::from_seed([37; 32]))
+    }
+
+    #[test]
+    fn test_u8() {
+        let mut rng = rng();
+        assert_eq!(u8::generate_random(&mut rng), 55);
+    }
+}

diff --git a/tests/Cargo.toml b/tests/Cargo.toml
new file mode 100644 (file)
index 0000000..efdbef6
--- /dev/null
+++ b/tests/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "generate-random-tests"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+generate-random = { path = "../lib" }
+generate-random-macro = { path = "../derive-macro" }
+rand = "0.8.5"
+rand_chacha = "0.3.1"

diff --git a/tests/src/lib.rs b/tests/src/lib.rs
new file mode 100644 (file)
index 0000000..c60fbc5
--- /dev/null
+++ b/tests/src/lib.rs
@@ -0,0 +1,130 @@
+#[cfg(test)]
+mod tests {
+    use generate_random::GenerateRandom;
+
+    fn rng() -> impl rand::Rng {
+        use rand::SeedableRng;
+        rand_chacha::ChaCha8Rng::from(rand_chacha::ChaCha8Core::from_seed([37; 32]))
+    }
+
+    fn repeat<T>(count: usize, f: impl FnMut() -> T) -> Vec<T> {
+        std::iter::repeat_with(f).take(count).collect()
+    }
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    enum TestEnumUnit {
+        Left,
+        #[weight(2)]
+        Right,
+    }
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    enum TestEnumUnnamed {
+        Left(u8),
+        #[weight(2)]
+        Right(bool),
+    }
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    enum TestEnumNamed {
+        Left { x: u8 },
+        #[weight(2)]
+        Right { y: bool },
+    }
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    struct TestStructUnit;
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    struct TestStructUnnamed(u8, i32);
+
+    #[derive(GenerateRandom, PartialEq, Eq, Debug)]
+    struct TestStructNamed {
+        x: u8,
+        y: i32,
+    }
+
+    #[test]
+    fn test_enum_unit() {
+        let mut rng = rng();
+        assert_eq!(
+            repeat(
+                6,
+                || TestEnumUnit::generate_random(&mut rng),
+            ),
+            vec![
+                TestEnumUnit::Right,
+                TestEnumUnit::Right,
+                TestEnumUnit::Left,
+                TestEnumUnit::Right,
+                TestEnumUnit::Right,
+                TestEnumUnit::Right,
+            ]);
+    }
+
+    #[test]
+    fn test_enum_unnamed() {
+        let mut rng = rng();
+        assert_eq!(
+            repeat(
+                6,
+                || TestEnumUnnamed::generate_random(&mut rng),
+            ),
+            vec![
+                TestEnumUnnamed::Right(false),
+                TestEnumUnnamed::Left(142),
+                TestEnumUnnamed::Right(false),
+                TestEnumUnnamed::Right(true),
+                TestEnumUnnamed::Right(false),
+                TestEnumUnnamed::Left(19),
+            ]);
+    }
+
+    #[test]
+    fn test_enum_named() {
+        let mut rng = rng();
+        assert_eq!(
+            repeat(
+                6,
+                || TestEnumNamed::generate_random(&mut rng),
+            ),
+            vec![
+                TestEnumNamed::Right { y: false },
+                TestEnumNamed::Left { x: 142 },
+                TestEnumNamed::Right { y: false },
+                TestEnumNamed::Right { y: true },
+                TestEnumNamed::Right { y: false },
+                TestEnumNamed::Left { x: 19 },
+            ]);
+    }
+
+    #[test]
+    fn test_struct_unit() {
+        let mut rng = rng();
+        assert_eq!(
+            TestStructUnit::generate_random(&mut rng),
+            TestStructUnit
+        );
+    }
+
+    #[test]
+    fn test_struct_unnamed() {
+        let mut rng = rng();
+        assert_eq!(
+            TestStructUnnamed::generate_random(&mut rng),
+            TestStructUnnamed(55, -896102575)
+        );
+    }
+
+    #[test]
+    fn test_struct_named() {
+        let mut rng = rng();
+        assert_eq!(
+            TestStructNamed::generate_random(&mut rng),
+            TestStructNamed {
+                x: 55,
+                y: -896102575,
+            }
+        );
+    }
+}