diff --git a/domain/src/test/java/com/malibin/study/domain/lotto/LottoNumberTest.kt b/domain/src/test/java/com/malibin/study/domain/lotto/LottoNumberTest.kt
new file mode 100644
index 0000000..9fb8179
--- /dev/null
+++ b/domain/src/test/java/com/malibin/study/domain/lotto/LottoNumberTest.kt
@@ -0,0 +1,46 @@
+package com.malibin.study.domain.lotto
+
+import com.google.common.truth.Truth
+import org.junit.jupiter.api.Test
+
+internal class LottoNumberTest {
+    @Test
+    fun `입력 숫자는 1보다 작을 수 없다`() {
+        // given
+        val number = 0
+
+        // when
+        val exception = kotlin.runCatching {
+            LottoNumber.of(number)
+        }.exceptionOrNull()
+
+        // then
+        Truth.assertThat(exception).isInstanceOf(IllegalArgumentException::class.java)
+    }
+
+    @Test
+    fun `입력 숫자는 45보다 클 수 없다`() {
+        // given
+        val number = 46
+
+        // when
+        val exception = kotlin.runCatching {
+            LottoNumber.of(number)
+        }.exceptionOrNull()
+
+        // then
+        Truth.assertThat(exception).isInstanceOf(IllegalArgumentException::class.java)
+    }
+
+    @Test
+    fun `입력 숫자는 1 이상 45 이하의 범위여야 한다`() {
+        // given
+        val number = 10
+
+        // when
+        val actualNumber = LottoNumber.of(number)
+
+        // then
+        Truth.assertThat(actualNumber.number).isEqualTo(number)
+    }
+}
diff --git a/domain/src/test/java/com/malibin/study/domain/lotto/result/MoneyTest.kt b/domain/src/test/java/com/malibin/study/domain/lotto/result/MoneyTest.kt
new file mode 100644
index 0000000..f18a481
--- /dev/null
+++ b/domain/src/test/java/com/malibin/study/domain/lotto/result/MoneyTest.kt
@@ -0,0 +1,48 @@
+package com.malibin.study.domain.lotto.result
+
+import com.google.common.truth.Truth
+import org.junit.jupiter.api.Test
+
+internal class MoneyTest {
+    @Test
+    fun `돈의 액수는 음수가 될 수 없다`() {
+        // given
+        val money = Money(-1)
+
+        // when
+        val exception = kotlin.runCatching {
+            money
+        }.exceptionOrNull()
+
+        // then
+        Truth.assertThat(exception).isInstanceOf(IllegalArgumentException::class.java)
+    }
+
+    @Test
+    fun `돈을 더할 수 있다`() {
+        // given
+        val money1 = Money(1000)
+        val money2 = Money(2000)
+        val plusResult = money1 + money2
+
+        // when
+        val actualPlusResult = money1.plus(money2)
+
+        // then
+        Truth.assertThat(actualPlusResult).isEqualTo(plusResult)
+    }
+
+    @Test
+    fun `돈을 뺄 수 있다`() {
+        // given
+        val money1 = Money(1000)
+        val money2 = Money(2000)
+        val minusResult = money2 - money1
+
+        // when
+        val actualMinusResult = money2.minus(money1)
+
+        // then
+        Truth.assertThat(actualMinusResult).isEqualTo(minusResult)
+    }
+}