housekeeping for tests for qrcode and aztec

src/qrcode/decoder/FormatInformationTestCase.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2007 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.zxing.qrcode.decoder;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author Sean Owen
+ */
+public final class FormatInformationTestCase extends Assert {
+
+  private static final int MASKED_TEST_FORMAT_INFO = 0x2BED;
+  private static final int UNMASKED_TEST_FORMAT_INFO = MASKED_TEST_FORMAT_INFO ^ 0x5412;
+
+  @Test
+  public void testBitsDiffering() {
+    assertEquals(0, FormatInformation.numBitsDiffering(1, 1));
+    assertEquals(1, FormatInformation.numBitsDiffering(0, 2));
+    assertEquals(2, FormatInformation.numBitsDiffering(1, 2));
+    assertEquals(32, FormatInformation.numBitsDiffering(-1, 0));
+  }
+
+  @Test
+  public void testDecode() {
+    // Normal case
+    FormatInformation expected =
+        FormatInformation.decodeFormatInformation(MASKED_TEST_FORMAT_INFO, MASKED_TEST_FORMAT_INFO);
+    assertNotNull(expected);
+    assertEquals((byte) 0x07, expected.getDataMask());
+    assertSame(ErrorCorrectionLevel.Q, expected.getErrorCorrectionLevel());
+    // where the code forgot the mask!
+    assertEquals(expected,
+                 FormatInformation.decodeFormatInformation(UNMASKED_TEST_FORMAT_INFO, MASKED_TEST_FORMAT_INFO));
+  }
+
+  @Test
+  public void testDecodeWithBitDifference() {
+    FormatInformation expected =
+        FormatInformation.decodeFormatInformation(MASKED_TEST_FORMAT_INFO, MASKED_TEST_FORMAT_INFO);
+    // 1,2,3,4 bits difference
+    assertEquals(expected, FormatInformation.decodeFormatInformation(
+        MASKED_TEST_FORMAT_INFO ^ 0x01, MASKED_TEST_FORMAT_INFO ^ 0x01));
+    assertEquals(expected, FormatInformation.decodeFormatInformation(
+        MASKED_TEST_FORMAT_INFO ^ 0x03, MASKED_TEST_FORMAT_INFO ^ 0x03));
+    assertEquals(expected, FormatInformation.decodeFormatInformation(
+        MASKED_TEST_FORMAT_INFO ^ 0x07, MASKED_TEST_FORMAT_INFO ^ 0x07));
+    assertNull(FormatInformation.decodeFormatInformation(
+        MASKED_TEST_FORMAT_INFO ^ 0x0F, MASKED_TEST_FORMAT_INFO ^ 0x0F));
+  }
+
+  @Test
+  public void testDecodeWithMisread() {
+    FormatInformation expected =
+        FormatInformation.decodeFormatInformation(MASKED_TEST_FORMAT_INFO, MASKED_TEST_FORMAT_INFO);
+    assertEquals(expected, FormatInformation.decodeFormatInformation(
+        MASKED_TEST_FORMAT_INFO ^ 0x03, MASKED_TEST_FORMAT_INFO ^ 0x0F));
+  }
+
+}