refactor: replace Assert.assertThat with Truth.assertThat

Author: DevDengChao

runner/AndroidJunitRunnerSample/app/src/androidTest/java/com/example/android/testing/androidjunitrunnersample/CalculatorAddParameterizedTest.java

@@ -16,21 +16,18 @@
 
 package com.example.android.testing.androidjunitrunnersample;
 
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.runners.Parameterized.Parameters;
+
+import androidx.test.filters.SmallTest;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
-import androidx.test.filters.SmallTest;
-
-import java.lang.Iterable;
 import java.util.Arrays;
 
-import static org.hamcrest.CoreMatchers.equalTo;
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-import static org.junit.runners.Parameterized.Parameters;
-
 
 /**
  * JUnit4 tests for the calculator's add logic.
@@ -73,7 +70,7 @@ public static Iterable<Object[]> data() {
      * to reuse them in your tests.
      */
     public CalculatorAddParameterizedTest(double operandOne, double operandTwo,
-            double expectedResult) {
+                                          double expectedResult) {
 
         mOperandOne = operandOne;
         mOperandTwo = operandTwo;
@@ -88,7 +85,7 @@ public void setUp() {
     @Test
     public void testAdd_TwoNumbers() {
         double resultAdd = mCalculator.add(mOperandOne, mOperandTwo);
-        assertThat(resultAdd, is(equalTo(mExpectedResult)));
+        assertThat(resultAdd).isEqualTo(mExpectedResult);
     }
 
 }

runner/AndroidJunitRunnerSample/app/src/androidTest/java/com/example/android/testing/androidjunitrunnersample/CalculatorTest.java

@@ -16,16 +16,15 @@
 
 package com.example.android.testing.androidjunitrunnersample;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import static com.google.common.truth.Truth.assertThat;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SmallTest;
 
-import static org.hamcrest.CoreMatchers.equalTo;
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 
 
 /**
@@ -45,25 +44,25 @@ public void setUp() {
     @Test
     public void addTwoNumbers() {
         double resultAdd = mCalculator.add(1d, 1d);
-        assertThat(resultAdd, is(equalTo(2d)));
+        assertThat(resultAdd).isEqualTo(2d);
     }
 
     @Test
     public void subTwoNumbers() {
         double resultSub = mCalculator.sub(1d, 1d);
-        assertThat(resultSub, is(equalTo(0d)));
+        assertThat(resultSub).isEqualTo(0d);
     }
 
     @Test
     public void subWorksWithNegativeResult() {
         double resultSub = mCalculator.sub(1d, 17d);
-        assertThat(resultSub, is(equalTo(-16d)));
+        assertThat(resultSub).isEqualTo(-16d);
     }
 
     @Test
     public void divTwoNumbers() {
         double resultDiv = mCalculator.div(32d,2d);
-        assertThat(resultDiv, is(equalTo(16d)));
+        assertThat(resultDiv).isEqualTo(16d);
     }
 
     @Test(expected = IllegalArgumentException.class)
@@ -74,7 +73,7 @@ public void divDivideByZeroThrows() {
     @Test
     public void mulTwoNumbers() {
         double resultMul = mCalculator.mul(32d, 2d);
-        assertThat(resultMul, is(equalTo(64d)));
+        assertThat(resultMul).isEqualTo(64d);
     }
 
 }