Initial support for 'Extract temp' - only when single expression selected

editor/tools/plugins/com.google.dart.tools.ui_test/src/com/google/dart/tools/ui/refactoring/ExtractLocalRefactoringTest.java

Index: editor/tools/plugins/com.google.dart.tools.ui_test/src/com/google/dart/tools/ui/refactoring/ExtractLocalRefactoringTest.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui_test/src/com/google/dart/tools/ui/refactoring/ExtractLocalRefactoringTest.java b/editor/tools/plugins/com.google.dart.tools.ui_test/src/com/google/dart/tools/ui/refactoring/ExtractLocalRefactoringTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..70c5515a960eab12ff0c5d160c00010107351286
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.tools.ui_test/src/com/google/dart/tools/ui/refactoring/ExtractLocalRefactoringTest.java
@@ -0,0 +1,142 @@
+/*
+ * 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.tools.ui.refactoring;
+
+import com.google.dart.tools.internal.corext.refactoring.code.ExtractLocalRefactoring;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.ltk.core.refactoring.Change;
+import org.eclipse.ltk.core.refactoring.PerformChangeOperation;
+import org.eclipse.ltk.core.refactoring.RefactoringStatus;
+
+import static org.fest.assertions.Assertions.assertThat;
+
+/**
+ * Test for {@link ExtractLocalRefactoring}.
+ */
+public final class ExtractLocalRefactoringTest extends RefactoringTest {
+  private static final IProgressMonitor pm = new NullProgressMonitor();
+
+  private int selectionStart;
+  private int selectionEnd;
+  private ExtractLocalRefactoring refactoring;
+  private RefactoringStatus refactoringStatus;
+
+  public void test_singleExpression() throws Exception {
+    setTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int a = 1 + 2; // marker",
+        "}");
+    selectionStart = findPattern("1", 0);
+    selectionEnd = findPattern("; // marker", 0);
+    doSuccessfullRefactoring();
+    assertTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int res = 1 + 2;",
+        "  int a = res; // marker",
+        "}");
+  }
+
+  public void test_singleExpression_Dynamic() throws Exception {
+    setTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {}",
+        "main() {",
+        "  int a = f(); // marker",
+        "}");
+    selectionStart = findPattern("f();", 0);
+    selectionEnd = findPattern("; // marker", 0);
+    doSuccessfullRefactoring();
+    assertTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {}",
+        "main() {",
+        "  var res = f();",
+        "  int a = res; // marker",
+        "}");
+  }
+
+  public void test_singleExpression_leadingSpace() throws Exception {
+    setTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int a = 1 + 2; // marker",
+        "}");
+    selectionStart = findPattern(" 1", 0);
+    selectionEnd = findPattern("; // marker", 0);
+    doSuccessfullRefactoring();
+    assertTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int res =  1 + 2;",
+        "  int a =res; // marker",
+        "}");
+  }
+
+  public void test_singleExpression_trailingSpace() throws Exception {
+    setTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int a = 1 + 2 ; // marker",
+        "}");
+    selectionStart = findPattern("1", 0);
+    selectionEnd = findPattern("; // marker", 0);
+    doSuccessfullRefactoring();
+    assertTestUnitContent(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "f() {",
+        "  int res = 1 + 2 ;",
+        "  int a = res; // marker",
+        "}");
+  }
+
+  /**
+   * Creates refactoring and checks all conditions.
+   */
+  private void createRefactoring(String tempName) throws CoreException {
+    int selectionLength = selectionEnd - selectionStart;
+    refactoring = new ExtractLocalRefactoring(testUnit, selectionStart, selectionLength);
+    refactoring.setLocalName(tempName);
+    refactoringStatus = refactoring.checkAllConditions(pm);
+  }
+
+  private void doSuccessfullRefactoring() throws CoreException {
+    // create refactoring
+    createRefactoring("res");
+    // OK status
+    assertTrue(refactoringStatus.isOK());
+    // perform change
+    performRefactoringChange();
+  }
+
+  /**
+   * @return the offset of the given "pattern" in {@link #testUnit}, adjusted to the given "delta".
+   */
+  private int findPattern(String pattern, int delta) throws Exception {
+    int offset = testUnit.getSource().indexOf(pattern);
+    assertThat(offset).as(pattern).isNotEqualTo(-1);
+    return offset + delta;
+  }
+
+  private void performRefactoringChange() throws CoreException {
+    Change change = refactoring.createChange(pm);
+    change.initializeValidationData(pm);
+    new PerformChangeOperation(change).run(pm);
+  }
+
+}