Clean up io.opencensus.internal.StringUtil.

We don't need StringUtil.sanitize, since we no longer sanitize tags.
Additionally, we don't need to throw an AssertionError from the constructor to
discourage instantiation of the class, because the class is now in the internal
package.

1 files changed, 5 insertions, 18 deletions

diff --git a/api/src/test/java/io/opencensus/internal/StringUtilTest.java b/api/src/test/java/io/opencensus/internal/StringUtilTest.java
index 790ce5f7..b5c74be0 100644
--- a/api/src/test/java/io/opencensus/internal/StringUtilTest.java
+++ b/api/src/test/java/io/opencensus/internal/StringUtilTest.java
@@ -16,9 +16,9 @@
 
 package io.opencensus.internal;
 
-import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
-import java.util.Arrays;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -26,23 +26,10 @@ import org.junit.runners.JUnit4;
 /** Tests for {@link StringUtil}. */
 @RunWith(JUnit4.class)
 public final class StringUtilTest {
-  @Test
-  public void testMaxLength() {
-    char[] string = new char[StringUtil.MAX_LENGTH];
-    char[] truncString = new char[StringUtil.MAX_LENGTH + 10];
-    Arrays.fill(string, 'v');
-    Arrays.fill(truncString, 'v');
-    assertThat(StringUtil.sanitize(new String(truncString))).isEqualTo(new String(string));
-  }
 
   @Test
-  public void testBadChar() {
-    String string = "\2ab\3cd";
-    assertThat(StringUtil.sanitize(string)).isEqualTo("_ab_cd");
-  }
-
-  @Test(expected = AssertionError.class)
-  public void testConstructor() {
-    new StringUtil();
+  public void isPrintableString() {
+    assertTrue(StringUtil.isPrintableString("abcd"));
+    assertFalse(StringUtil.isPrintableString("\2ab\3cd"));
   }
 }