Add tests for stripIndent

Author: zbynek

dev/core/src/com/google/gwt/dev/javac/testing/impl/JavaResourceBase.java

@@ -346,7 +346,7 @@ public class JavaResourceBase {
           "  }",
           "  private native boolean equals(String obj) /*-{ return false; }-*/;",
           "  public boolean equalsIgnoreCase(String str) { return false; }",
-          "  public native boolean isEmpty() /*-{ return true; }-*/;",
+          "  public int length() { return 0; }",
           "  public static String valueOf(int i) { return \"\" + i; }",
           "  public static String valueOf(char c) { return \"\" + c; }",
           "  public int hashCode() { return 0; }",

user/test-super/com/google/gwt/emultest/super/com/google/gwt/emultest/java17/lang/StringTest.java

@@ -58,12 +58,16 @@ public void testStripIndent() {
     assertEquals("x", hideFromCompiler("x").stripIndent());
     assertEquals("x", hideFromCompiler("  x").stripIndent());
     assertEquals("x\n", hideFromCompiler("x\r\n").stripIndent());
+    assertEquals("x\n", hideFromCompiler("  x\n  ").stripIndent());
+    assertEquals("  x\n", hideFromCompiler("    x\n  ").stripIndent());
+    assertEquals("  x\n", hideFromCompiler("  x\n").stripIndent());
     assertEquals("x\ny", hideFromCompiler("  x\n  y").stripIndent());
     assertEquals("x\ny", hideFromCompiler("  x\r\n  y").stripIndent());
     assertEquals(" x\ny", hideFromCompiler("  x\n y").stripIndent());
     assertEquals("x\n y", hideFromCompiler(" x\n  y").stripIndent());
     assertEquals("x\n\ny", hideFromCompiler("  x\n      \n  y").stripIndent());
     assertEquals(" x\ny", hideFromCompiler("\t x\r\n y").stripIndent());
+    assertEquals("x\n\ny", hideFromCompiler("  x\n\n  y").stripIndent());
   }
 
   public void testTranslateEscapes() {