| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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 org.codehaus.groovy.transform.tailrec |
| |
| import org.codehaus.groovy.ast.ClassHelper |
| import org.codehaus.groovy.ast.builder.AstAssert |
| import org.codehaus.groovy.ast.builder.AstBuilder |
| import org.codehaus.groovy.ast.expr.ArgumentListExpression |
| import org.codehaus.groovy.ast.expr.ConstantExpression |
| import org.codehaus.groovy.ast.expr.StaticMethodCallExpression |
| import org.codehaus.groovy.ast.stmt.BlockStatement |
| import org.codehaus.groovy.ast.stmt.ReturnStatement |
| import org.junit.Test |
| |
| class ReturnStatementToIterationConverterTest { |
| |
| @Test |
| void oneConstantParameter() { |
| ReturnStatement statement = new AstBuilder().buildFromSpec { |
| returnStatement { |
| methodCall { |
| variable "this" |
| constant "myMethod" |
| argumentList { constant 1 } |
| } |
| } |
| }[0] |
| statement.statementLabel = "aLabel" |
| |
| BlockStatement expected = new AstBuilder().buildFromSpec { |
| block { |
| expression { |
| binary { |
| variable '_a_' |
| token '=' |
| constant 1 |
| } |
| } |
| continueStatement { |
| label InWhileLoopWrapper.LOOP_LABEL |
| } |
| } |
| }[0] |
| |
| Map positionMapping = [0: [name: '_a_', type: ClassHelper.DYNAMIC_TYPE]] |
| def block = new ReturnStatementToIterationConverter().convert(statement, positionMapping) |
| |
| AstAssert.assertSyntaxTree([expected], [block]) |
| assert block.statementLabels[0] == "aLabel" |
| } |
| |
| @Test |
| void twoParametersOnlyOneUsedInRecursiveCall() { |
| |
| BlockStatement expected = new AstBuilder().buildFromSpec { |
| block { |
| expression { |
| declaration { |
| variable '__a__' |
| token '=' |
| variable '_a_' |
| } |
| } |
| expression { |
| binary { |
| variable '_a_' |
| token '=' |
| constant 1 |
| } |
| } |
| expression { |
| binary { |
| variable '_b_' |
| token '=' |
| binary { |
| variable '__a__' |
| token '+' |
| constant 1 |
| } |
| } |
| } |
| continueStatement { |
| label InWhileLoopWrapper.LOOP_LABEL |
| } |
| } |
| }[0] |
| |
| ReturnStatement statement = new AstBuilder().buildFromString(""" |
| return(myMethod(1, _a_ + 1)) |
| """)[0].statements[0] |
| |
| Map positionMapping = [0: [name: '_a_', type: ClassHelper.DYNAMIC_TYPE], 1: [name: '_b_', type: ClassHelper.DYNAMIC_TYPE]] |
| def block = new ReturnStatementToIterationConverter().convert(statement, positionMapping) |
| |
| AstAssert.assertSyntaxTree([expected], [block]) |
| } |
| |
| @Test |
| void twoParametersBothUsedInRecursiveCall() { |
| BlockStatement expected = new AstBuilder().buildFromSpec { |
| block { |
| expression { |
| declaration { |
| variable '__a__' |
| token '=' |
| variable '_a_' |
| } |
| } |
| expression { |
| declaration { |
| variable '__b__' |
| token '=' |
| variable '_b_' |
| } |
| } |
| expression { |
| binary { |
| variable '_a_' |
| token '=' |
| binary { |
| variable '__a__' |
| token '+' |
| constant 1 |
| } |
| } |
| } |
| expression { |
| binary { |
| variable '_b_' |
| token '=' |
| binary { |
| variable '__b__' |
| token '+' |
| variable '__a__' |
| } |
| } |
| } |
| continueStatement { |
| label InWhileLoopWrapper.LOOP_LABEL |
| } |
| } |
| }[0] |
| |
| ReturnStatement statement = new AstBuilder().buildFromString(""" |
| return(myMethod(_a_ + 1, _b_ + _a_)) |
| """)[0].statements[0] |
| |
| |
| Map positionMapping = [0: [name: '_a_', type: ClassHelper.DYNAMIC_TYPE], 1: [name: '_b_', type: ClassHelper.DYNAMIC_TYPE]] |
| def block = new ReturnStatementToIterationConverter().convert(statement, positionMapping) |
| |
| AstAssert.assertSyntaxTree([expected], [block]) |
| } |
| |
| @Test |
| void worksWithStaticMethods() { |
| ReturnStatement statement = new ReturnStatement(new StaticMethodCallExpression( |
| ClassHelper.make(Math, false), "min", |
| new ArgumentListExpression(new ConstantExpression(1)))) |
| |
| BlockStatement expected = new AstBuilder().buildFromSpec { |
| block { |
| expression { |
| binary { |
| variable '_a_' |
| token '=' |
| constant 1 |
| } |
| } |
| continueStatement { |
| label InWhileLoopWrapper.LOOP_LABEL |
| } |
| } |
| }[0] |
| |
| Map positionMapping = [0: [name: '_a_', type: ClassHelper.DYNAMIC_TYPE]] |
| def block = new ReturnStatementToIterationConverter().convert(statement, positionMapping) |
| |
| AstAssert.assertSyntaxTree([expected], [block]) |
| } |
| } |