Add initial JavaFrontend

1 files changed, 56 insertions, 0 deletions

diff --git a/src/test/java/org/zwobble/couscous/tests/JavaToPythonTests.java b/src/test/java/org/zwobble/couscous/tests/JavaToPythonTests.java
new file mode 100644
index 0000000..cbd8ca5
--- /dev/null
+++ b/src/test/java/org/zwobble/couscous/tests/JavaToPythonTests.java
@@ -0,0 +1,56 @@
+package org.zwobble.couscous.tests;
+
+import java.nio.file.Files;
+
+import org.junit.Test;
+import org.zwobble.couscous.ast.TypeName;
+import org.zwobble.couscous.frontends.java.JavaFrontend;
+import org.zwobble.couscous.tests.backends.python.PythonMethodRunner;
+import org.zwobble.couscous.values.PrimitiveValue;
+
+import static java.util.Arrays.asList;
+import static org.junit.Assert.assertEquals;
+import static org.zwobble.couscous.tests.util.ExtraFiles.deleteRecursively;
+import static org.zwobble.couscous.values.PrimitiveValues.value;
+
+import lombok.SneakyThrows;
+import lombok.val;
+
+public class JavaToPythonTests {
+    @Test
+    public void canEvaluateLiterals() {
+        assertEquals(value("hello"), evalExpression("\"hello\""));
+        assertEquals(value(true), evalExpression("true"));
+        assertEquals(value(false), evalExpression("false"));
+        assertEquals(value(42), evalExpression("42"));
+    }
+
+    @SneakyThrows
+    private PrimitiveValue evalExpression(String expressionSource) {
+        val javaClass =
+            "package com.example;" +
+            "public class Example {" +
+            "    public static Object main() {" +
+            "        return " + expressionSource + ";" +
+            "    }" +
+            "}";
+
+        val directoryPath = Files.createTempDirectory(null);
+        try {
+            Files.createDirectories(directoryPath.resolve("com/example"));
+            Files.write(
+                directoryPath.resolve("com/example/Example.java"),
+                asList(javaClass));
+            
+            val classNodes = JavaFrontend.readSourceDirectory(directoryPath);
+            
+            return new PythonMethodRunner().runMethod(
+                classNodes,
+                TypeName.of("com.example.Example"),
+                "main",
+                asList());
+        } finally {
+            deleteRecursively(directoryPath.toFile());
+        }
+    }
+}