Java tutorial
/* * Copyright (c) 2012, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.google.dart.java2dart; import com.google.common.base.Joiner; import com.google.common.collect.ImmutableMap; import com.google.dart.engine.ast.ASTNode; import com.google.dart.engine.ast.CompilationUnit; import com.google.dart.engine.utilities.io.PrintStringWriter; import com.google.dart.java2dart.util.ToFormattedSourceVisitor; import org.apache.commons.lang3.StringUtils; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.dom.AST; import org.eclipse.jdt.core.dom.ASTParser; import static org.fest.assertions.Assertions.assertThat; /** * Test for {@link SyntaxTranslator}. */ public class SyntaxTranslatorTest extends AbstractSemanticTest { /** * @return the formatted Dart source dump of the given {@link ASTNode}. */ private static String toFormattedSource(ASTNode node) { PrintStringWriter writer = new PrintStringWriter(); node.accept(new ToFormattedSourceVisitor(writer)); return writer.toString(); } private Context context = new Context(); private org.eclipse.jdt.core.dom.CompilationUnit javaUnit; private com.google.dart.engine.ast.CompilationUnit dartUnit; public void test_classAbstract() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public abstract class A {", "}"); assertDartSource(// "abstract class A {", "}"); } public void test_classEmpty() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", "}"); assertDartSource(// "class A {", "}"); } public void test_classExtends() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", "}", "public class B extends A {", "}", ""); assertDartSource(// "class A {", "}", "class B extends A {", "}"); } public void test_classImplements() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public interface I1 {}", "public interface I2 {}", "public interface I3 {}", "public class B implements I1, I2, I3 {", "}", ""); assertDartSource("abstract class I1 {", "}", "abstract class I2 {", "}", "abstract class I3 {", "}", "class B implements I1, I2, I3 {", "}"); } public void test_classTypeArguments_Void() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class Test<T> {", " void main() {", " new Test<Void>();", " }", "}"); assertDartSource(// "class Test<T> {", " void main() {", " new Test<Object>();", " }", "}"); } public void test_classTypeParameters() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A<K, V extends String> {", " void test(K k, V v) {", " }", "}"); assertDartSource(// "class A<K, V extends String> {", " void test(K k, V v) {", " }", "}"); } public void test_commentDoc_class() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "/**", " * Some comment.", " */", "public class A {", "}"); assertDartSource(// "", "/**", " * Some comment.", " */", "class A {", "}"); } public void test_commentDoc_escaping() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "/**", " * Some [ident] ignored.", " * Second line.", " */", "public class A {", "}"); assertDartSource("", "/**", " * Some \\[ident\\] ignored.", " * Second line.", " */", "class A {", "}"); } public void test_commentDoc_field() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " /**", " * Some comment.", " */", " int foo;", "}"); assertDartSource(// "class A {", " ", " /**", " * Some comment.", " */", " int foo;", "}"); } public void test_commentDoc_method() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " /**", " * Some comment.", " */", " void foo() {}", "}"); assertDartSource("class A {", " ", " /**", " * Some comment.", " */", " void foo() {", " }", "}"); } public void test_constructor() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " A() {", " print(0);", " }", " A(int p) {", " print(1);", " }", "}"); assertDartSource("class A {", " A.jtd_constructor_0_decl() {", " _jtd_constructor_0_impl();", " }", " _jtd_constructor_0_impl() {", " print(0);", " }", " A.jtd_constructor_1_decl(int p) {", " _jtd_constructor_1_impl(p);", " }", " _jtd_constructor_1_impl(int p) {", " print(1);", " }", "}"); } public void test_enum_withImplements() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public interface I {}", "public enum Direction implements I {", "}"); assertDartSource("abstract class I {", "}", "class Direction implements Comparable<Direction>, I {", " static final List<Direction> values = [];", " ", " /// The name of this enum constant, as declared in the enum declaration.", " final String name;", " ", " /// The position in the enum declaration.", " final int ordinal;", " Direction.jtd_constructor_0_decl(this.name, this.ordinal) {", " }", " int compareTo(Direction other) => ordinal - other.ordinal;", " String toString() => name;", "}"); } public void test_expression_equals() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " boolean testA(Object a, Object b) {", " return a == b;", " }", " boolean testB(Object p) {", " return p == null || p == 1 || p == 2L || p == 3.0f || p == 4.0d;", " }", "}"); assertDartSource("class A {", " bool testA(Object a, Object b) => identical(a, b);", " bool testB(Object p) => p == null || p == 1 || p == 2 || p == 3.0 || p == 4.0;", "}"); } public void test_expression_instanceOf() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(Object p) {", " boolean b1 = p instanceof String;", " boolean b2 = !(p instanceof String);", " }", "}"); assertDartSource(// "class A {", " void test(Object p) {", " bool b1 = p is String;", " bool b2 = !(p is String);", " }", "}"); } public void test_expressionArrayAccess() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(String[] items) {", " print(items[0]);", " }", "}"); assertDartSource(// "class A {", " void test(List<String> items) {", " print(items[0]);", " }", "}"); } public void test_expressionArrayCreation_dimensionOne() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " Object v = new int[] {1, 2, 3};", " }", "}"); assertDartSource(// "class A {", " void test() {", " Object v = <int> [1, 2, 3];", " }", "}"); } public void test_expressionArrayCreation_dimensionTwo() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " Object v = new int[][] {new int[] {1, 2, 3}, new int[] {10, 20, 30}};", " }", "}"); assertDartSource("class A {", " void test() {", " Object v = <List<int>> [<int> [1, 2, 3], <int> [10, 20, 30]];", " }", "}"); } public void test_expressionArrayCreation_noInitializer() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " String[] v = new String[3];", " }", "}"); assertDartSource(// "class A {", " void test() {", " List<String> v = new List<String>(3);", " }", "}"); } public void test_expressionArrayInitializer() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int[] v = {1, 2, 3};", " }", "}"); assertDartSource(// "class A {", " void test() {", " List<int> v = [1, 2, 3];", " }", "}"); } public void test_expressionAssignment() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v;", " v = 1;", " v += 1;", " v -= 1;", " v *= 1;", " v /= 1;", " v %= 1;", " v ^= 1;", " v |= 1;", " v &= 1;", " v <<= 1;", " v >>= 1;", " }", "}"); assertDartSource("class A {", " void test() {", " int v;", " v = 1;", " v += 1;", " v -= 1;", " v *= 1;", " v /= 1;", " v %= 1;", " v ^= 1;", " v |= 1;", " v &= 1;", " v <<= 1;", " v >>= 1;", " }", "}"); } public void test_expressionCast() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class Test {", " void main(Object p) {", " print((Integer) p);", " }", "}"); assertDartSource(// "class Test {", " void main(Object p) {", " print((p as int));", " }", "}"); } public void test_expressionClassInstanceCreation() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(int p) {", " }", " void foo() {", " new A(123);", " }", "}"); assertDartSource(// "class A {", " void test(int p) {", " }", " void foo() {", " new A(123);", " }", "}"); } public void test_expressionClassInstanceCreation_typeArguments() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A<K, V> {", "}", "public class B {", " void test() {", " new A<String, B>();", " }", "}", ""); assertDartSource(// "class A<K, V> {", "}", "class B {", " void test() {", " new A<String, B>();", " }", "}"); } public void test_expressionConditional() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v = true ? 1 : 2;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int v = true ? 1 : 2;", " }", "}"); } public void test_expressionFieldAccess_thisQualifier() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " int field;", " test() {", " print(this.field);", " }", "}"); assertDartSource(// "class A {", " int field;", " test() {", " print(this.field);", " }", "}"); } public void test_expressionInfix() throws Exception { setFileLines("test/Test.java", toString("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int m1 = 0 + 1;", " int m2 = 0 - 1;", " int m3 = 0 * 1;", " int m4 = 0 / 1;", " int m5 = 0.0 / 1;", " int m6 = 0 / 1.0;", " int m7 = 0 % 1;", " int s1 = 0 << 1;", " int s2 = 0 >> 1;", " int s3 = 0 >>> 1;", " boolean c1 = false || true;", " boolean c2 = false && true;", " int b1 = 0 ^ 1;", " int b2 = 0 | 1;", " int b3 = 0 & 1;", " boolean r1 = 0 < 1;", " boolean r2 = 0 > 1;", " boolean r3 = 0 <= 1;", " boolean r4 = 0 >= 1;", " boolean r5 = 0 == 1;", " boolean r6 = 0 != 1;", " }", "}")); Context context = new Context(); context.addSourceFolder(tmpFolder); context.addSourceFiles(tmpFolder); // do translate CompilationUnit unit = context.translate(); assertEquals(toString("class A {", " void test() {", " int m1 = 0 + 1;", " int m2 = 0 - 1;", " int m3 = 0 * 1;", " int m4 = 0 ~/ 1;", " int m5 = 0.0 / 1;", " int m6 = 0 / 1.0;", " int m7 = 0 % 1;", " int s1 = 0 << 1;", " int s2 = 0 >> 1;", " int s3 = 0 >> 1;", " bool c1 = false || true;", " bool c2 = false && true;", " int b1 = 0 ^ 1;", " int b2 = 0 | 1;", " int b3 = 0 & 1;", " bool r1 = 0 < 1;", " bool r2 = 0 > 1;", " bool r3 = 0 <= 1;", " bool r4 = 0 >= 1;", " bool r5 = 0 == 1;", " bool r6 = 0 != 1;", " }", "}"), getFormattedSource(unit)); } public void test_expressionInfix_multipleOperands() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v = 0 + 1 + 2 + 3 + 4;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int v = 0 + 1 + 2 + 3 + 4;", " }", "}"); } public void test_expressionInvocation_qualified() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " this.foo(0);", " }", " void foo(int p) {}", "}"); assertDartSource(// "class A {", " void test() {", " this.foo(0);", " }", " void foo(int p) {", " }", "}"); } public void test_expressionInvocation_unqualified() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(0);", " print(1);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(0);", " print(1);", " }", "}"); } public void test_expressionParenthesized() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v = (1 + 3) / 2;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int v = (1 + 3) / 2;", " }", "}"); } public void test_expressionPostfix() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v = 0;", " int v1 = v++;", " int v2 = v--;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int v = 0;", " int v1 = v++;", " int v2 = v--;", " }", "}"); } public void test_expressionPrefix() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int v1 = +0;", " int v2 = -0;", " int v3 = ~0;", " int v4 = !0;", " int v5 = ++v1;", " int v6 = --v1;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int v1 = 0;", " int v2 = -0;", " int v3 = ~0;", " int v4 = !0;", " int v5 = ++v1;", " int v6 = --v1;", " }", "}"); } public void test_expressionQualifiedName_forField() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " int field;", "}", "public class B {", " void test(A a) {", " print(a.field);", " }", "}"); assertDartSource(// "class A {", " int field;", "}", "class B {", " void test(A a) {", " print(a.field);", " }", "}"); } public void test_expressionThis() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(this);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(this);", " }", "}"); } public void test_expressionThrow() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " throw new Exception();", " }", "}"); assertDartSource(// "class A {", " void test() {", " throw new Exception();", " }", "}"); } public void test_expressionTypeLiteral() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(A.class);", " print(my.company.project.A.class);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(A);", " print(my.company.project.A);", " }", "}"); } public void test_field() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " int field;", " int f1 = 1, f2 = 2;", "}"); assertDartSource(// "class A {", " int field;", " int f1 = 1, f2 = 2;", "}"); } public void test_interface() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "interface A {", " int foo();", " void bar();", "}"); assertDartSource(// "abstract class A {", " int foo();", " void bar();", "}"); } public void test_literalBoolean() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(true);", " print(false);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(true);", " print(false);", " }", "}"); } public void test_literalCharacter() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " char c = '0';", " }", "}"); assertDartSource(// "class A {", " void test() {", " int c = 0x30;", " }", "}" ); } public void test_literalDouble() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(0.0);", " print(1d);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(0.0);", " print(1.0);", " }", "}"); } public void test_literalInt() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(0);", " print(1);", " print(0xDEAD);", " print(0xBEAF);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(0);", " print(1);", " print(0xDEAD);", " print(0xBEAF);", " }", "}"); } public void test_literalLong() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(0l);", " print(1L);", " print(0xDEADl);", " print(0xBEAFL);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(0);", " print(1);", " print(0xDEAD);", " print(0xBEAF);", " }", "}"); } public void test_literalNull() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(null);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(null);", " }", "}"); } public void test_literalString() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(\"abc\");", " print(\"a'b\");", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(\"abc\");", " print(\"a'b\");", " }", "}"); } public void test_literalString_escapeInterpolation() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(\"a$b\");", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(\"a\\$b\");", " }", "}"); } public void test_literalString_newLine() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(\"A\\nB\");", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(\"A\\nB\");", " }", "}"); } public void test_methodEmpty() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " }", "}"); assertDartSource(// "class A {", " void test() {", " }", "}"); } public void test_methodParameters() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(boolean b, int i, double d, String s) {", " }", "}"); assertDartSource(// "class A {", " void test(bool b, int i, double d, String s) {", " }", "}"); } public void test_methodReturnType() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void foo() {", " }", "}"); assertDartSource(// "class A {", " void foo() {", " }", "}"); } /** * We don't generate "final" because it is very hard to simulate Java constructors in Dart. */ public void test_modifiers_field() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " public int fPublic;", " protected int fProtected;", " int fDefault;", " private int fPrivate;", " final int fFinal;", " static final int fStaticFinal;", "}"); assertDartSource(// "class A {", " int fPublic;", " int fProtected;", " int fDefault;", " int fPrivate;", " int fFinal;", " static int fStaticFinal;", "}"); } /** * We don't generate modifiers, everything is public! */ public void test_modifiers_method() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " public void mPublic() {}", " protected void mProtected() {}", " void mDefault() {}", " private void mPrivate() {}", " static void mStatic() {}", "}"); assertDartSource(// "class A {", " void mPublic() {", " }", " void mProtected() {", " }", " void mDefault() {", " }", " void mPrivate() {", " }", " static void mStatic() {", " }", "}"); } public void test_statementAssert() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " assert 1 < 2;", " }", "}"); assertDartSource(// "class A {", " void test() {", " assert(1 < 2);", " }", "}"); } public void test_statementBreak() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " while (true) {", " break;", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " while (true) {", " break;", " }", " }", "}"); } public void test_statementBreak_withLabel() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " L: L2: while (true) {", " break L;", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " L: L2: while (true) {", " break L;", " }", " }", "}"); } public void test_statementConstructorInvocation() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " public A() {", " this(42);", " }", " public A(int p) {", " }", "}", ""); assertDartSource(// "class A {", " A.jtd_constructor_0_decl() {", " _jtd_constructor_0_impl();", " }", " _jtd_constructor_0_impl() {", " jtdTmp(42);", " }", " A.jtd_constructor_1_decl(int p) {", " _jtd_constructor_1_impl(p);", " }", " _jtd_constructor_1_impl(int p) {", " }", "}"); } public void test_statementContinue() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " while (true) {", " continue;", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " while (true) {", " continue;", " }", " }", "}"); } public void test_statementContinue_withLabel() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " L: L2: while (true) {", " continue L;", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " L: L2: while (true) {", " continue L;", " }", " }", "}"); } public void test_statementDo() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " do {", " print(0);", " } while (true);", " }", "}"); assertDartSource(// "class A {", " void test() {", " do {", " print(0);", " } while (true);", " }", "}"); } public void test_statementEmpty() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " ;", " ;", " }", "}"); assertDartSource(// "class A {", " void test() {", " ;", " ;", " }", "}"); } public void test_statementFor() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " for (int i = 0; i < 10; i++) {", " print(i);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " for (int i = 0; i < 10; i++) {", " print(i);", " }", " }", "}"); } public void test_statementFor_noInitializer() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int i = 0;", " for (; i < 10; i++) {", " print(i);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " int i = 0;", " for (; i < 10; i++) {", " print(i);", " }", " }", "}"); } public void test_statementFor2() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int i;", " for (i = 0; i < 10; i++) {", " print(i);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " int i;", " for (i = 0; i < 10; i++) {", " print(i);", " }", " }", "}"); } public void test_statementForEach() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(Iterable<String> items) {", " for (String item: items) {", " print(item);", " }", " }", "}"); assertDartSource(// "class A {", " void test(Iterable<String> items) {", " for (String item in items) {", " print(item);", " }", " }", "}"); } public void test_statementIf() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " if (1 < 2) {", " print(0);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " if (1 < 2) {", " print(0);", " }", " }", "}"); } public void test_statementIfElse() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " if (1 < 2) {", " print(1);", " } else {", " print(2);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " if (1 < 2) {", " print(1);", " } else {", " print(2);", " }", " }", "}"); } public void test_statementReturn() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " int foo() {", " return 42;", " }", "}"); assertDartSource(// "class A {", " int foo() => 42;", "}"); } public void test_statementSuperMethodInvocation() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(int p) {}", "}", "public class B extends A {", " void test() {", " print(1);", " super.test(2);", " print(3);", " }", "}", ""); assertDartSource("class A {", " void test(int p) {", " }", "}", "class B extends A {", " void test() {", " print(1);", " super.test(2);", " print(3);", " }", "}"); } public void test_statementSwitch() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void main(int p) {", " switch (p) {", " case 1:", " if (0 == 1) {", " print(0);", " break;", " }", " print(1);", " break;", " case 2:", " case 3:", " print(2);", " break;", " default:", " print(3);", " break;", " }", " }", "}"); assertDartSource("class A {", " void main(int p) {", " while (true) {", " if (p == 1) {", " if (0 == 1) {", " print(0);", " break;", " }", " print(1);", " } else if (p == 2 || p == 3) {", " print(2);", " } else {", " print(3);", " }", " break;", " }", " }", "}"); } public void test_statementSynchronized() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " synchronized (this) {", " print(0);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " {", " print(0);", " }", " }", "}"); } public void test_statementTry_catch() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " try {", " print(0);", " } catch (E1 e) {", " print(1);", " } catch (E2 e) {", " print(2);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " try {", " print(0);", " } on E1 catch (e) {", " print(1);", " } on E2 catch (e) {", " print(2);", " }", " }", "}"); } public void test_statementTry_finally() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " try {", " print(1);", " } finally {", " print(2);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " try {", " print(1);", " } finally {", " print(2);", " }", " }", "}"); } public void test_statementVariableDeclaration() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " int a = 1;", " int b = 2, c = 3;", " }", "}"); assertDartSource(// "class A {", " void test() {", " int a = 1;", " int b = 2, c = 3;", " }", "}"); } public void test_statementWhile() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " while (true) {", " print(0);", " }", " }", "}"); assertDartSource(// "class A {", " void test() {", " while (true) {", " print(0);", " }", " }", "}"); } public void test_typeArray() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(String[] items, String[][] labels) {", " }", "}"); assertDartSource(// "class A {", " void test(List<String> items, List<List<String>> labels) {", " }", "}"); } public void test_typeArray2() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(String items[], String labels[][]) {", " }", "}"); assertDartSource(// "class A {", " void test(List<String> items, List<List<String>> labels) {", " }", "}"); } public void test_typeLiteral_wrapper() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " print(Integer.class);", " print(Double.class);", " }", "}"); assertDartSource(// "class A {", " void test() {", " print(int);", " print(double);", " }", "}"); } public void test_typePrimitive() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " boolean v1;", " byte v2;", " char v3;", " short v4;", " int v5;", " long v6;", " float v7;", " double v8;", " }", "}"); assertDartSource(// "class A {", " void test() {", " bool v1;", " int v2;", " int v3;", " int v4;", " int v5;", " int v6;", " double v7;", " double v8;", " }", "}"); } public void test_typeWildcard() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test() {", " List<?> v1;", " List<? extends String> v2;", " }", "}"); assertDartSource(// "class A {", " void test() {", " List<Object> v1;", " List<String> v2;", " }", "}"); } public void test_typeWrapper() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " Void testVoid() {return null;}", " Boolean testBoolean() {return null;}", " Short testShort() {return null;}", " Integer testInteger() {return null;}", " Long testLong() {return null;}", " Float testFloat() {return null;}", " Double testDouble() {return null;}", " BigInteger testBigInteger() {return null;}", "}"); assertDartSource("class A {", " Object testVoid() => null;", " bool testBoolean() => null;", " int testShort() => null;", " int testInteger() => null;", " int testLong() => null;", " double testFloat() => null;", " double testDouble() => null;", " int testBigInteger() => null;", "}"); } public void test_unitEmpty() throws Exception { parseJava(); assertDartSource(""); } /** * We can generate <code>List</code> for var-args declaration, but we don't know about them at * invocation point during syntax translation, only at semantic step. */ public void test_varArgs() throws Exception { parseJava("// filler filler filler filler filler filler filler filler filler filler", "public class A {", " void test(int errorCode, Object ...args) {", " }", " void main() {", " test(-1);", " test(-1, 2, 3.0);", " }", "}"); assertDartSource(// "class A {", " void test(int errorCode, List<Object> args) {", " }", " void main() {", " test(-1);", " test(-1, 2, 3.0);", " }", "}"); } void printFormattedSource() { translate(); String source = toFormattedSource(dartUnit); String[] lines = StringUtils.split(source, '\n'); for (int i = 0; i < lines.length; i++) { String line = lines[i]; System.out.print("\""); line = StringUtils.replace(line, "\"", "\\\""); System.out.print(line); if (i != lines.length - 1) { System.out.println("\","); } else { System.out.println("\""); } } } /** * Translates {@link #javaUnit} into {@link #dartUnit} and check that it produces given Dart * source. */ private void assertDartSource(String... lines) { translate(); String actualDartSource = toFormattedSource(dartUnit); String expectedDartSource = Joiner.on("\n").join(lines); assertEquals(expectedDartSource, actualDartSource); } /** * Parse Java source lines into {@link #javaUnit}. */ private void parseJava(String... lines) { String source = Joiner.on("\n").join(lines); ASTParser parser = ASTParser.newParser(AST.JLS4); parser.setCompilerOptions(ImmutableMap.of(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_5, JavaCore.COMPILER_DOC_COMMENT_SUPPORT, JavaCore.ENABLED)); parser.setSource(source.toCharArray()); javaUnit = (org.eclipse.jdt.core.dom.CompilationUnit) parser.createAST(null); assertThat(javaUnit.getProblems()).isEmpty(); } private void translate() { dartUnit = SyntaxTranslator.translate(context, javaUnit); } }