Split BackspaceTest into language-specific parts

GitOrigin-RevId: ac0cd278e8e678688160590e92e886647eb15bb3

platform/platform-tests/testData/codeInsight/backspace/DifferentBrackets.txt

@@ -0,0 +1 @@
+([(<caret>)])

platform/platform-tests/testData/codeInsight/backspace/DifferentBrackets_after.txt

@@ -0,0 +1 @@
+([<caret>])

platform/platform-tests/testSrc/com/intellij/codeInsight/PlainTextBackspaceTest.java

@@ -0,0 +1,25 @@
+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.codeInsight;
+
+import com.intellij.testFramework.LightPlatformCodeInsightTestCase;
+import com.intellij.testFramework.PlatformTestUtil;
+import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.NotNull;
+
+public class PlainTextBackspaceTest extends LightPlatformCodeInsightTestCase {
+  @NotNull
+  @Override
+  protected String getTestDataPath() {
+    return PlatformTestUtil.getPlatformTestDataPath();
+  }
+
+  public void testDifferentBrackets() { doTest(); }
+
+  private void doTest() {
+    @NonNls String path = "/codeInsight/backspace/";
+
+    configureByFile(path + getTestName(false) + ".txt");
+    backspace();
+    checkResultByFile(path + getTestName(false) + "_after.txt");
+  }
+}

xml/tests/src/com/intellij/codeInsight/XmlBackspaceTest.java

@@ -0,0 +1,24 @@
+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.codeInsight;
+
+import com.intellij.testFramework.LightPlatformCodeInsightTestCase;
+import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.NotNull;
+
+public class XmlBackspaceTest extends LightPlatformCodeInsightTestCase {
+  @Override
+  protected @NotNull String getTestDataPath() {
+    return XmlTestUtil.getXmlTestDataPath();
+  }
+
+  public void testQuoteInXml() { doTest(); }
+  public void testQuoteInXml2() { doTest(); }
+
+  private void doTest() {
+    @NonNls String path = "/codeInsight/backspace/";
+
+    configureByFile(path + getTestName(false) + ".xml");
+    backspace();
+    checkResultByFile(path + getTestName(false) + "_after.xml");
+  }
+}

xml/tests/testData/codeInsight/backspace/QuoteInXml.xml

@@ -0,0 +1,2 @@
+<root a="<caret>">
+</root>

xml/tests/testData/codeInsight/backspace/QuoteInXml2.xml

@@ -0,0 +1,2 @@
+<root a=""<caret>">
+</root>

xml/tests/testData/codeInsight/backspace/QuoteInXml2_after.xml

@@ -0,0 +1,2 @@
+<root a="<caret>">
+</root>

xml/tests/testData/codeInsight/backspace/QuoteInXml_after.xml

@@ -0,0 +1,2 @@
+<root a=<caret>>
+</root>