Add tests for BtcFixedFormat.

core/src/test/java/org/bitcoinj/utils/BtcFixedFormatTest.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2019 Tim Strasser
+ *
+ * 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 org.bitcoinj.utils;
+
+import static org.bitcoinj.utils.BtcFormat.COIN_SCALE;
+import static org.bitcoinj.utils.BtcFormat.MICROCOIN_SCALE;
+import static org.bitcoinj.utils.BtcFormat.MILLICOIN_SCALE;
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Locale;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(Parameterized.class)
+public class BtcFixedFormatTest {
+
+    private final ArrayList<Integer> groups;
+    private int input;
+    private String expectedOutput;
+    private BtcFixedFormat btcFixedFormat;
+
+    public BtcFixedFormatTest(int input, String expectedOutput) {
+        this.input = input;
+        this.expectedOutput = expectedOutput;
+        this.groups = new ArrayList<>();
+    }
+
+    @Parameterized.Parameters
+    public static Collection<Object[]> parameters() {
+        return Arrays.asList(new Object[][]{
+                {COIN_SCALE, "Coin-"},
+                {1, "Decicoin-"},
+                {2, "Centicoin-"},
+                {MILLICOIN_SCALE, "Millicoin-"},
+                {MICROCOIN_SCALE, "Microcoin-"},
+                {-1, "Dekacoin-"},
+                {-2, "Hectocoin-"},
+                {-3, "Kilocoin-"},
+                {-6, "Megacoin-"},
+                {-100, "Fixed (-100) "}
+        });
+    }
+
+    @Before
+    public void initBtcFixedFormat() {
+        this.btcFixedFormat = new BtcFixedFormat(Locale.getDefault(), input, 2, groups);
+    }
+
+    @Test
+    public void testPrefixLabel() {
+        assertEquals(String.format("%s%s %s", expectedOutput, "format", btcFixedFormat.pattern()),
+                btcFixedFormat.toString());
+    }
+}

core/src/test/java/org/bitcoinj/utils/BtcFixedFormatThrowsIllegalStateExceptionTest.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019 Tim Strasser
+ *
+ * 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 org.bitcoinj.utils;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Locale;
+
+import org.junit.Test;
+
+public class BtcFixedFormatThrowsIllegalStateExceptionTest {
+
+    @Test(expected = IllegalStateException.class)
+    public void testScaleThrowsIllegalStateException() {
+        BtcFixedFormat btcFixedFormat = new BtcFixedFormat(Locale.getDefault(), BtcFormat.MILLICOIN_SCALE, 2,
+                new ArrayList<Integer>());
+        btcFixedFormat.scale(new BigInteger("2000"), 0);
+    }
+}