feat: move tests to related unit test cases

Author: adrianliz

exercises/tiered_pricing/solutions/adrianliz/java/src/main/java/tv/codely/checkout/InvalidSubscriptionTierPrice.java

@@ -0,0 +1,8 @@
+package tv.codely.checkout;
+
+public final class InvalidSubscriptionTierPrice extends RuntimeException {
+
+    public InvalidSubscriptionTierPrice(final String message) {
+        super(message);
+    }
+}

exercises/tiered_pricing/solutions/adrianliz/java/src/main/java/tv/codely/checkout/PriceNotFound.java

@@ -0,0 +1,9 @@
+package tv.codely.checkout;
+
+public final class SubscriptionTierNotFound extends RuntimeException {
+
+    public SubscriptionTierNotFound(int numberOfSubscriptions) {
+        super(String.format("Subscription tier not found for %d numberOfSubscriptions",
+            numberOfSubscriptions));
+    }
+}

exercises/tiered_pricing/solutions/adrianliz/java/src/main/java/tv/codely/checkout/SubscriptionTierNotFound.java

@@ -7,9 +7,16 @@ public final class SubscriptionTierPrice {
     private final double value;
 
     public SubscriptionTierPrice(double value) {
+        validate(value);
         this.value = value;
     }
 
+    private static void validate(double value) {
+        if (value < 1) {
+            throw new InvalidSubscriptionTierPrice("The price cannot be negative");
+        }
+    }
+
     public double unitPrice() {
         return value;
     }

exercises/tiered_pricing/solutions/adrianliz/java/src/main/java/tv/codely/checkout/SubscriptionTierPrice.java

@@ -29,7 +29,7 @@ private SubscriptionTier findSuitableTier(int numberOfSubscriptions) {
         return tiers.stream()
             .filter(tier -> tier.isInRange(numberOfSubscriptions))
             .findFirst()
-            .orElseThrow(() -> new PriceNotFound(numberOfSubscriptions));
+            .orElseThrow(() -> new SubscriptionTierNotFound(numberOfSubscriptions));
     }
 
     public double getTotalPrice(int numberOfSubscriptions) {

exercises/tiered_pricing/solutions/adrianliz/java/src/main/java/tv/codely/checkout/SubscriptionTiers.java

@@ -0,0 +1,13 @@
+package tv.codely.checkout;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+public final class SubscriptionTierPriceShould {
+
+    @Test
+    void throw_invalid_subscription_tier_price_if_price_is_less_than_1() {
+        assertThrows(InvalidSubscriptionTierPrice.class, () -> new SubscriptionTierPrice(0));
+    }
+}

exercises/tiered_pricing/solutions/adrianliz/java/src/test/java/tv/codely/checkout/SubscriptionTierPriceShould.java

@@ -0,0 +1,19 @@
+package tv.codely.checkout;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+public final class SubscriptionTierRangeShould {
+
+    @Test
+    void throw_invalid_subscription_tier_range_if_number_of_subscriptions_is_less_than_1() {
+        assertThrows(InvalidSubscriptionTierRange.class, () -> SubscriptionTierRange.first(0));
+    }
+
+    @Test
+    void throw_invalid_subscription_tier_range_if_previous_range_does_not_exist() {
+        assertThrows(InvalidSubscriptionTierRange.class, () -> SubscriptionTierRange.last(null));
+    }
+
+}

exercises/tiered_pricing/solutions/adrianliz/java/src/test/java/tv/codely/checkout/SubscriptionTierRangeShould.java

@@ -2,7 +2,6 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Set;
 import org.junit.jupiter.api.Test;
@@ -37,11 +36,6 @@ private static Set<SubscriptionTier> defaultSubscriptionTiers() {
                 new SubscriptionTierPrice(149)));
     }
 
-    @Test
-    void unit_test_example() {
-        assertTrue(true);
-    }
-
     @Test
     void return_total_price_based_on_number_of_subscriptions() {
         final var subscriptionTiers = SubscriptionTierMother.randoms();
@@ -115,18 +109,10 @@ void throw_invalid_subscription_tiers_if_there_is_no_last_tier() {
     }
 
     @Test
-    void throw_invalid_subscription_tier_range_if_number_of_susbcriptions_is_less_than_1() {
-        assertThrows(InvalidSubscriptionTierRange.class, () -> SubscriptionTierRange.first(0));
-    }
-
-    @Test
-    void throw_invalid_subscription_tier_range_if_previous_range_does_not_exist() {
-        assertThrows(InvalidSubscriptionTierRange.class, () -> SubscriptionTierRange.last(null));
-    }
-
-    @Test
-    void throw_price_not_found_if_number_of_subscriptions_is_not_valid() {
+    void throw_subscription_tier_not_found_if_number_of_subscriptions_does_not_match_any_tier() {
         final var tieredPricing = new TieredPricing(defaultSubscriptionTiers());
-        assertThrows(PriceNotFound.class, () -> tieredPricing.getTotalPrice(0));
+        final var numberOfSubscriptions = 0;
+        assertThrows(SubscriptionTierNotFound.class,
+            () -> tieredPricing.getTotalPrice(numberOfSubscriptions));
     }
 }