Simplify color utils and fix tests, resolves #156

1 files changed, 50 insertions, 0 deletions

diff --git a/core/src/androidTest/kotlin/ca/allanwang/kau/utils/UtilsAndroidTest.kt b/core/src/androidTest/kotlin/ca/allanwang/kau/utils/UtilsAndroidTest.kt
new file mode 100644
index 0000000..665e0b2
--- /dev/null
+++ b/core/src/androidTest/kotlin/ca/allanwang/kau/utils/UtilsAndroidTest.kt
@@ -0,0 +1,50 @@
+/*
+ * 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
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Test
+import org.junit.runner.RunWith
+import kotlin.test.assertEquals
+
+/**
+ * Created by Allan Wang on 2018-12-24.
+ *
+ * Misc test code that are dependent on android
+ */
+@RunWith(AndroidJUnit4::class)
+class UtilsAndroidTest {
+
+    @Test
+    fun colorBlend() {
+        assertEquals(0x22446688, 0x11335577.blendWith(0x33557799, 0.5f), "Failed to blend with 50% ratio")
+        assertEquals(0x11335577, 0x11335577.blendWith(0x33557799, 0.0f), "Failed to blend with 0% ratio")
+        assertEquals(0x33557799, 0x22446688.blendWith(0x33557799, 1.0f), "Failed to blend with 100% ratio")
+    }
+
+    @Test
+    fun lighten() {
+        assertEquals(Color.WHITE, Color.WHITE.lighten(0.35f), "Should not be able to further lighten white")
+        assertEquals(0xFFEEAAEA.toInt(), 0xFFDD55D5.toInt().lighten(0.5f), "Failed to lighten color by 50%")
+    }
+
+    @Test
+    fun darken() {
+        assertEquals(Color.BLACK, Color.BLACK.darken(0.35f), "Should not be able to further darken black")
+        assertEquals(0xFF224424.toInt(), 0xFF448848.toInt().darken(0.5f), "Failed to darken color by 50%")
+    }
+}