Add CI for main branch

.github/workflows/main.yml

@@ -0,0 +1,17 @@
+name: Main CI
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+jobs:
+  unit-testing:
+    name: Unit testing
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2
+      - run: rustup target add wasm32-unknown-unknown
+      - name: Build and test contract
+        run:  ./build.sh | cargo test

sandbox-rs/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "sandbox"
+version = "1.0.0"
+publish = false
+edition = "2021"
+
+[dev-dependencies]
+tokio = { version = "1.18.1", features = ["full"] }
+near-workspaces = "0.9.0"
+serde_json = { version = "1.0", features = ["arbitrary_precision"] }
+
+[[example]]
+name = "sandbox"
+path = "src/tests.rs"

sandbox-rs/src/tests.rs

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+use near_workspaces::{types::NearToken, Account, Contract};
+use serde_json::json;
+use std::{env, fs};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let wasm_arg: &str = &(env::args().nth(1).unwrap());
+    let wasm_filepath = fs::canonicalize(env::current_dir()?.join(wasm_arg))?;
+
+    let worker = near_workspaces::sandbox().await?;
+    let wasm = std::fs::read(wasm_filepath)?;
+    let contract = worker.dev_deploy(&wasm).await?;
+
+    // create accounts
+    let account = worker.dev_create_account().await?;
+    let alice = account
+        .create_subaccount("alice")
+        .initial_balance(NearToken::from_near(30))
+        .transact()
+        .await?
+        .into_result()?;
+
+    // begin tests
+    // test_default_message(&alice, &contract).await?;
+    // test_changes_message(&alice, &contract).await?;
+    Ok(())
+}
+
+
+/*
+async fn test_default_message(
+    user: &Account,
+    contract: &Contract,
+) -> Result<(), Box<dyn std::error::Error>> {
+    let greeting: String = user
+        .call(contract.id(), "get_greeting")
+        .args_json(json!({}))
+        .transact()
+        .await?
+        .json()?;
+
+    assert_eq!(greeting, "Hello".to_string());
+    println!("      Passed ✅ gets default greeting");
+    Ok(())
+}
+
+async fn test_changes_message(
+    user: &Account,
+    contract: &Contract,
+) -> Result<(), Box<dyn std::error::Error>> {
+    user.call(contract.id(), "set_greeting")
+        .args_json(json!({"greeting": "Howdy"}))
+        .transact()
+        .await?
+        .into_result()?;
+
+    let greeting: String = user
+        .call(contract.id(), "get_greeting")
+        .args_json(json!({}))
+        .transact()
+        .await?
+        .json()?;
+
+    assert_eq!(greeting, "Howdy".to_string());
+    println!("      Passed ✅ changes greeting");
+    Ok(())
+}
+*/