jpype...

java-project/.gitignore

@@ -0,0 +1 @@
+target

java-project/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.mycompany.app</groupId>
+    <artifactId>my-app</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>30.1-jre</version>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.4</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <minimizeJar>true</minimizeJar>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

requirements.txt

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+jpype1
+cffi

tests/jpype_script_base.py

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+import jpype
+
+def test_noop():
+
+    jpype.startJVM(jpype.getDefaultJVMPath())
+
+    Random = jpype.JClass('java.util.Random')
+    String = jpype.JClass('java.lang.String')
+    System = jpype.JClass('java.lang.System')
+    # Create an instance of java.util.Random
+    random = Random()
+    for _ in range(20):
+        System.out.println(String.format("Random number: %d", random.nextInt()))
+
+    # Shutdown the JVM
+    jpype.shutdownJVM()

tests/test_java.py

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+import os
+import pytest
+import jpype
+from jpype import startJVM, shutdownJVM
+
+
+@pytest.fixture(scope="session", autouse=False)
+def setupJVM():
+    """
+    Setup a JVM configured to use the Europe/Rome timezone.
+    """
+    os.environ["TZ"] = "Europe/Rome"
+    startJVM(
+        convertStrings=False,
+        classpath=["java-project/target/guava-28.2-android.jar"],
+        )
+    yield
+    shutdownJVM()
+
+
+def test_guava_ascii(setupJVM):
+    Ascii = jpype.JClass("com.google.common.base.Ascii")
+    assert Ascii.toLowerCase("EuroPython") == "europython"
+
+
+@pytest.mark.parametrize("inet_addr,is_valid", [
+    ("1.2.3.4", True),
+    ("3ffe::1", True),
+    ("3ffe::1z", False),
+    ("333.1.1.1", False),
+])
+def test_InetAddress(setupJVM, inet_addr, is_valid):
+    InetAddress = jpype.JClass("com.google.common.net.InetAddresses")
+    assert InetAddress.isInetAddress(inet_addr) == is_valid
+
+
+def test_automatic_imports(setupJVM):
+    java = jpype.JPackage("java")
+    from java.lang import String
+
+    assert String.format("Hello, %s", "World") == "Hello, World"
+
+
+def test_bigdecimal(setupJVM):
+    BigDecimal = jpype.JClass("java.math.BigDecimal")
+    a, b = 0.1, 0.2
+    b_a = BigDecimal(a)
+    b_b = BigDecimal(b)
+    assert b_a.add(b_b) == BigDecimal(a+b)
+    raise ValueError("This test is expected to fail")

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py3, safety
+envlist = py3
 
 # By default, we do not publish a module.
 skipsdist=True