test: add simple tests on java side

.github/workflows/test.yml

@@ -28,3 +28,5 @@ jobs:
           toolchain: ${{ matrix.toolchain }}
       - run: cargo build --verbose
       - run: cargo test --verbose
+      - uses: gradle/actions/setup-gradle@v4
+      - run: gradle test

.gitignore

@@ -1 +1,10 @@
+# rust
 /target
+
+# gradle
+/build
+/bin
+/.settings
+/.gradle
+.project
+.classpath

Cargo.lock

@@ -57,7 +57,7 @@ name = "jni-toolbox"
 version = "0.1.3"
 dependencies = [
  "jni",
- "jni-toolbox-macro 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jni-toolbox-macro",
  "uuid",
 ]
 
@@ -71,14 +71,11 @@ dependencies = [
 ]
 
 [[package]]
-name = "jni-toolbox-macro"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9970cad895bb316f70956593710d675d27a480ddbb8099f7e313042463a16d9b"
+name = "jni-toolbox-test"
+version = "0.1.0"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn",
+ "jni",
+ "jni-toolbox",
 ]
 
 [[package]]

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["macro"]
+members = ["macro", "src/test"]
 
 [package]
 name = "jni-toolbox"

build.gradle

@@ -0,0 +1,17 @@
+plugins {
+	id 'java-library'
+}
+
+dependencies {
+	testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
+	testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
+}
+
+repositories {
+	mavenCentral()
+}
+
+test {
+	useJUnitPlatform()
+	systemProperty 'java.library.path','target/debug'
+}

src/test/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "jni-toolbox-test"
+description = "test binary for jni-toolbox"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+path = "test.rs"
+
+[dependencies]
+jni-toolbox = { path = "../.." }
+jni = "0.21"

src/test/java/toolbox/Main.java

@@ -0,0 +1,25 @@
+package toolbox;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+
+public class Main {
+	static {
+		System.loadLibrary("jni_toolbox_test");
+	}
+
+	static native int sum(int a, int b);
+	static native String concat(String a, String b);
+
+	@Test
+	public void argumentsByValue() {
+		assertEquals(Main.sum(42, 13), 42 + 13);
+	}
+
+	@Test
+	public void argumentsByReference() {
+		assertEquals(Main.concat("hello", "world"), "hello -- world");
+	}
+	
+}

src/test/test.rs

@@ -0,0 +1,11 @@
+use jni_toolbox::jni;
+
+#[jni(package = "toolbox", class = "Main")]
+fn sum(a: i32, b: i32) -> i32 {
+	a + b
+}
+
+#[jni(package = "toolbox", class = "Main")]
+fn concat(a: String, b: String) -> String {
+	format!("{a} -- {b}")
+}