Java tutorial
/******************************************************************************* * Copyright (c) 2011, 2012 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.che.jdt.quickfix; import org.eclipse.che.jdt.testplugin.Java17ProjectTestSetup; import org.eclipse.che.jdt.testplugin.JavaProjectHelper; import org.eclipse.che.jdt.testplugin.TestOptions; import org.eclipse.jdt.core.ICompilationUnit; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IPackageFragment; import org.eclipse.jdt.core.IPackageFragmentRoot; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.formatter.DefaultCodeFormatterConstants; import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility; import org.eclipse.jdt.internal.corext.template.java.CodeTemplateContextType; import org.eclipse.jdt.internal.ui.JavaPlugin; import org.eclipse.jdt.internal.ui.text.correction.AssistContext; import org.eclipse.jdt.internal.ui.text.correction.CorrectionMessages; import org.eclipse.jdt.ui.PreferenceConstants; import org.eclipse.jface.preference.IPreferenceStore; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.util.Hashtable; import java.util.List; public class AdvancedQuickAssistTest17 extends QuickFixTest { private IJavaProject fJProject1; private IPackageFragmentRoot fSourceFolder; public AdvancedQuickAssistTest17() { super(new Java17ProjectTestSetup()); } @Before public void setUp() throws Exception { super.setUp(); Hashtable options = TestOptions.getDefaultOptions(); options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_CHAR, JavaCore.SPACE); options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_SIZE, "4"); JavaCore.setOptions(options); IPreferenceStore store = JavaPlugin.getDefault().getPreferenceStore(); store.setValue(PreferenceConstants.CODEGEN_ADD_COMMENTS, false); store.setValue(PreferenceConstants.CODEGEN_KEYWORD_THIS, false); StubUtility.setCodeTemplate(CodeTemplateContextType.METHODSTUB_ID, "//TODO\n${body_statement}", null); // Preferences corePrefs = JavaPlugin.getJavaCorePluginPreferences(); // corePrefs.setValue(JavaCore.CODEASSIST_FIELD_PREFIXES, ""); // corePrefs.setValue(JavaCore.CODEASSIST_STATIC_FIELD_PREFIXES, ""); // corePrefs.setValue(JavaCore.CODEASSIST_FIELD_SUFFIXES, ""); // corePrefs.setValue(JavaCore.CODEASSIST_STATIC_FIELD_SUFFIXES, ""); fJProject1 = Java17ProjectTestSetup.getProject(); fSourceFolder = JavaProjectHelper.addSourceContainer(fJProject1, "src"); } @After public void tearDown() throws Exception { super.tearDown(); JavaProjectHelper.clear(fJProject1, Java17ProjectTestSetup.getDefaultClasspath()); } @Test public void testConvertSwitchToIf() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\":\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\":\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default:\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("switch"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 2); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (\"abc\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (\"xyz\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s.equals(\"abc\")) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (s.equals(\"xyz\")) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected2 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1, expected2 }); } @Test public void testConvertIfToSwitch1() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s.equals(\"abc\")) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (s.equals(\"xyz\")) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 4); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1 }); } @Test public void testConvertIfToSwitch2() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (\"abc\" == s) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (\"xyz\" == s) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 3); assertCorrectLabels(proposals); assertProposalDoesNotExist(proposals, CorrectionMessages.AdvancedQuickAssistProcessor_convertIfElseToSwitch); } @Test public void testConvertIfToSwitch3() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (\"abc\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (\"xyz\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 5); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s == null) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected2 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1, expected2 }); } @Test public void testConvertIfToSwitch4() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s.equals(\"abc\")) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (\"xyz\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 5); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s == null) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" default :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected2 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1, expected2 }); } @Test public void testConvertIfToSwitch5() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (\"abc\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" } else if (\"xyz\".equals(s)) {\n"); buf.append(" System.out.println();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertNumberOfProposals(proposals, 5); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("public class E {\n"); buf.append(" public void foo(String s) {\n"); buf.append(" if (s == null) {\n"); buf.append(" } else {\n"); buf.append(" switch (s) {\n"); buf.append(" case \"abc\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" case \"xyz\" :\n"); buf.append(" System.out.println();\n"); buf.append(" break;\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); String expected2 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1, expected2 }); } @Test public void testReplaceReturnConditionWithIf4() throws Exception { //https://bugs.eclipse.org/bugs/show_bug.cgi?id=112443 IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.util.Collections;\n"); buf.append("import java.util.List;\n"); buf.append("public class E {\n"); buf.append(" List<String> foo(int a) {\n"); buf.append(" return a > 0 ? new ArrayList<>() : new ArrayList<>();\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("?"); AssistContext context = getCorrectionContext(cu, offset, 0); List proposals = collectAssists(context, false); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.util.Collections;\n"); buf.append("import java.util.List;\n"); buf.append("public class E {\n"); buf.append(" List<String> foo(int a) {\n"); buf.append(" if (a > 0)\n"); buf.append(" return new ArrayList<>();\n"); buf.append(" else\n"); buf.append(" return new ArrayList<>();\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1 }); } @Test public void testReplaceReturnIfWithCondition3() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.util.ArrayList;\n"); buf.append("import java.util.List;\n"); buf.append("public class E {\n"); buf.append(" public List<String> foo(int a) {\n"); buf.append(" if (a > 0) {\n"); buf.append(" return new ArrayList<>();\n"); buf.append(" } else {\n"); buf.append(" return new ArrayList<>();\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.util.ArrayList;\n"); buf.append("import java.util.List;\n"); buf.append("public class E {\n"); buf.append(" public List<String> foo(int a) {\n"); buf.append(" return a > 0 ? new ArrayList<String>() : new ArrayList<String>();\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1 }); } @Test public void testReplaceReturnIfWithCondition4() throws Exception { IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null); StringBuffer buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.util.Collections;\n"); buf.append("import java.util.Map;\n"); buf.append("public class E {\n"); buf.append(" public Map<String, java.io.IOException> foo(int a) {\n"); buf.append(" if (a > 0) {\n"); buf.append(" return Collections.emptyMap();\n"); buf.append(" } else {\n"); buf.append(" return Collections.singletonMap(\"none\", null);\n"); buf.append(" }\n"); buf.append(" }\n"); buf.append("}\n"); ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null); int offset = buf.toString().indexOf("if"); AssistContext context = getCorrectionContext(cu, offset, 0); assertNoErrors(context); List proposals = collectAssists(context, false); assertCorrectLabels(proposals); buf = new StringBuffer(); buf.append("package test1;\n"); buf.append("import java.io.IOException;\n"); buf.append("import java.util.Collections;\n"); buf.append("import java.util.Map;\n"); buf.append("public class E {\n"); buf.append(" public Map<String, java.io.IOException> foo(int a) {\n"); buf.append( " return a > 0 ? Collections.<String, IOException>emptyMap() : Collections.<String, IOException>singletonMap(\"none\", null);\n"); buf.append(" }\n"); buf.append("}\n"); String expected1 = buf.toString(); assertExpectedExistInProposals(proposals, new String[] { expected1 }); } }