From f904a91318f6b859b1ef60a6bcef6c3a6c2888b1 Mon Sep 17 00:00:00 2001
From: Cerulan Lumina <CerulanLumina@users.noreply.github.com>
Date: Mon, 22 Jul 2024 16:24:02 -0400
Subject: [PATCH] Add determinism ensurance tests

---
 .github/workflows/ci.yml       | 21 +++++++++++++++++++++
 tests/.gitignore               |  2 ++
 tests/data/determinism-base.rs | 16 ++++++++++++++++
 tests/justfile                 | 19 +++++++++++++++++++
 4 files changed, 58 insertions(+)
 create mode 100644 tests/.gitignore
 create mode 100644 tests/data/determinism-base.rs
 create mode 100644 tests/justfile

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d33dae9e..3e9bceb8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,6 +40,27 @@ jobs:
           toolchain: ${{ matrix.rust }}
       - run: rustup run ${{ matrix.rust }} cargo test --all-features
 
+  
+  check-deterministic:
+    name: Ensure Deterministic Output
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust:
+          - stable
+    steps:
+      - uses: actions/checkout@v2
+      - uses: extractions/setup-just@v1
+        with:
+          just-version: 1
+      - uses: kenji-miyake/setup-sd@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+      - run: rustup toolchain install ${{ matrix.rust }}
+      - run: just --justfile tests/justfile determinism
+    
 
   fmt:
     name: Rustfmt
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 00000000..53087960
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,2 @@
+input
+out
diff --git a/tests/data/determinism-base.rs b/tests/data/determinism-base.rs
new file mode 100644
index 00000000..f4706493
--- /dev/null
+++ b/tests/data/determinism-base.rs
@@ -0,0 +1,16 @@
+#[typeshare]
+pub struct CustomType {}
+
+#[typeshare]
+pub struct Types {
+    pub s: String,
+    pub static_s: &'static str,
+    pub int8: i8,
+    pub float: f32,
+    pub double: f64,
+    pub array: Vec<String>,
+    pub fixed_length_array: [String; 4],
+    pub dictionary: HashMap<String, i32>,
+    pub optional_dictionary: Option<HashMap<String, i32>>,
+    pub custom_type: CustomType,
+}
diff --git a/tests/justfile b/tests/justfile
new file mode 100644
index 00000000..65335df9
--- /dev/null
+++ b/tests/justfile
@@ -0,0 +1,19 @@
+determinism_qty := '100'
+
+all: determinism
+
+generate-determinism-files:
+    #!/bin/sh
+    mkdir -p input
+    for i in $(seq 1 {{determinism_qty}}); do
+        cat data/determinism-base.rs | sd '(struct )(\w+)' "\${1}\${2}$i" > "input/input$i.rs"
+    done
+determinism: clean generate-determinism-files
+    mkdir -p out
+    cargo run -p typeshare-cli -- -l typescript -o "out/output1.ts" input
+    cargo run -p typeshare-cli -- -l typescript -o "out/output2.ts" input
+    diff -q out/*.ts
+
+clean:
+    rm -rf out
+    rm -rf input