1 files changed, 34 insertions, 1 deletions
diff --git a/core/src/test/kotlin/ca/allanwang/kau/utils/UtilsTest.kt b/core/src/test/kotlin/ca/allanwang/kau/utils/UtilsTest.kt
index ce2b757..b9c200a 100644
--- a/core/src/test/kotlin/ca/allanwang/kau/utils/UtilsTest.kt
+++ b/core/src/test/kotlin/ca/allanwang/kau/utils/UtilsTest.kt
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Allan Wang
+ *
+ * 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 ca.allanwang.kau.utils
 
 import android.graphics.Color
@@ -17,9 +32,27 @@ class UtilsTest {
     }
 
     @Test
+    fun colorWithAlpha() {
+        val origColor = 0xFF123456.toInt()
+        assertEquals(0x00123456, origColor.withAlpha(0), "Failed to convert with alpha 0")
+        assertEquals(0x50123456, origColor.withAlpha(80), "Failed to convert with alpha 80")
+        assertEquals(0xFF123456.toInt(), origColor.withAlpha(255), "Failed to convert with alpha 255")
+        assertEquals(0xFF123456.toInt(), origColor.withAlpha(0xFF), "Failed to convert with alpha 0xFF")
+        assertEquals(Color.TRANSPARENT, Color.BLACK.withAlpha(0), "Failed to convert black to transparent")
+    }
+
+    @Test
+    fun colorWithMinAlpha() {
+        val origColor = 0x80123456.toInt()
+        assertEquals(origColor, origColor.withMinAlpha(0), "Failed to convert with min alpha 0")
+        assertEquals(0xFA123456.toInt(), origColor.withMinAlpha(0xFA), "Failed to convert with min alpha 0xFA")
+        assertEquals(Color.BLUE, Color.BLUE.withMinAlpha(89), "Failed to convert blue with min alpha 89")
+    }
+
+    @Test
     fun rounding() {
         assertEquals("1.23", 1.23456f.round(2))
         assertEquals("22.466", 22.465920439.round(3))
         assertEquals("22", 22f.round(3))
     }
-}
-\ No newline at end of file
+}