AssertStatement added

src/org/jetbrains/jet/j2k/Converter.java

@@ -147,7 +147,7 @@ public class Converter {
   @NotNull
   public static Expression expressionToExpression(@Nullable PsiExpression e) {
     if (e == null)
-      return new EmptyExpression();
+      return Expression.EMPTY_EXPRESSION;
     final ExpressionVisitor expressionVisitor = new ExpressionVisitor();
     e.accept(expressionVisitor);
     System.out.println(e.getClass());

src/org/jetbrains/jet/j2k/ast/AssertStatement.java

@@ -0,0 +1,23 @@
+package org.jetbrains.jet.j2k.ast;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author ignatov
+ */
+public class AssertStatement extends Statement {
+  private final Expression myCondition;
+  private final Expression myDetail;
+
+  public AssertStatement(Expression condition, Expression detail) {
+    myCondition = condition;
+    myDetail = detail;
+  }
+
+  @NotNull
+  @Override
+  public String toKotlin() {
+    String detail = myDetail != Expression.EMPTY_EXPRESSION ? "(" + myDetail.toKotlin() + ")" : EMPTY;
+    return "assert" + detail + SPACE + "{" + myCondition.toKotlin() + "}";
+  }
+}

src/org/jetbrains/jet/j2k/ast/EmptyExpression.java

@@ -1,14 +0,0 @@
-package org.jetbrains.jet.j2k.ast;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * @author ignatov
- */
-public class EmptyExpression extends Expression {
-  @NotNull
-  @Override
-  public String toKotlin() {
-    return EMPTY;
-  }
-}

src/org/jetbrains/jet/j2k/ast/Expression.java

@@ -1,7 +1,21 @@
 package org.jetbrains.jet.j2k.ast;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * @author ignatov
  */
 public abstract class Expression extends Statement {
+  public static final Expression EMPTY_EXPRESSION = new EmptyExpression();
+
+  /**
+   * @author ignatov
+   */
+  private static class EmptyExpression extends Expression {
+    @NotNull
+    @Override
+    public String toKotlin() {
+      return EMPTY;
+    }
+  }
 }

src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java

@@ -12,7 +12,7 @@ import static org.jetbrains.jet.j2k.Converter.*;
  * @author ignatov
  */
 public class ExpressionVisitor extends StatementVisitor implements Visitor {
-  private Expression myResult = new EmptyExpression();
+  private Expression myResult = Expression.EMPTY_EXPRESSION;
 
   @NotNull
   public Expression getResult() {

src/org/jetbrains/jet/j2k/visitors/StatementVisitor.java

@@ -25,6 +25,11 @@ public class StatementVisitor extends ElementVisitor implements Visitor {
   @Override
   public void visitAssertStatement(PsiAssertStatement statement) {
     super.visitAssertStatement(statement);
+
+    myResult = new AssertStatement(
+      expressionToExpression(statement.getAssertCondition()),
+      expressionToExpression(statement.getAssertDescription())
+    );
   }
 
   @Override

test/org/jetbrains/jet/j2k/ast/AssertStatementTest.java

@@ -0,0 +1,30 @@
+package org.jetbrains.jet.j2k.ast;
+
+import junit.framework.Assert;
+import org.jetbrains.jet.j2k.JetTestCaseBase;
+
+/**
+ * @author ignatov
+ */
+public class AssertStatementTest extends JetTestCaseBase {
+  public void testOnlyCondition() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin("assert boolMethod();"),
+      "assert {boolMethod()}"
+    );
+  }
+
+  public void testOnlyConditionWithBraces() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin("assert(boolMethod());"),
+      "assert {(boolMethod())}"
+    );
+  }
+
+  public void testWithStringDetail() throws Exception {
+    Assert.assertEquals(
+      statementToKotlin("assert true : \"string details\";"),
+      "assert(\"string details\") {true}"
+    );
+  }
+}