Calcular rendimento

.gitignore

@@ -1,3 +1,8 @@
 
 # Ignore .DS_Store files
 .DS_Store
+calcular-rendimento/.settings
+calcular-rendimento/apache-maven-3.9.11
+calcular-rendimento/target
+calcular-rendimento/.classpath
+calcular-rendimento/.project

calcular-rendimento/.gitignore

@@ -0,0 +1,20 @@
+#Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar

calcular-rendimento/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>br.db.tec.CalcularRendimento</groupId>
+  <artifactId>CalcularRendimento</artifactId>
+  <version>1</version>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.junit</groupId>
+        <artifactId>junit-bom</artifactId>
+        <version>6.0.0</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>3.5.4</version>
+      </plugin>
+    </plugins>
+  </build>
+</project>

calcular-rendimento/src/main/java/com/br/DbTec/CalcularRendimento/CalcularRendimento.java

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+package com.br.DbTec.CalcularRendimento;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CalcularRendimento {
+
+  public static void main(String[] args) {
+    System.out.println("Calculo do Rendimento " + CalculateIncomeAmmout(1000, 10, (float) 9.5, (float) 0.3));
+
+  }
+
+  /**
+   * Calculates the final income amount based on compound interest.
+   * Assumes a monthly tax rate based on SELIC > 8.5% or <= 8.5% plus a
+   * Referential Tax (TR).
+   *
+   * @param ammout         The initial investment principal.
+   * @param numberOfMonths The number of months.
+   * @param selic          The annual SELIC rate (as a percentage, e.g., 9.5).
+   * @param referencialTax The monthly Referential Tax (as a percentage, e.g.,
+   *                       0.1).
+   * @return The final total amount (principal + interest).
+   */
+  public static Double CalculateIncomeAmmout(double ammout, int numberOfMonths, float selic, float referencialTax) {
+
+    final float tr = referencialTax / 100;
+    List<Double> results = new ArrayList<>();
+
+    double montlyTax;
+
+    if (selic <= 8.5) {
+      montlyTax = 0.007 + tr;
+    } else {
+      montlyTax = 0.005 + tr;
+    }
+
+    Double finalAmount = ammout * Math.pow(1.0 + montlyTax, numberOfMonths);
+    Double finalResult = finalAmount + ammout;
+
+    int aux = 1;
+    while (aux <= numberOfMonths) {
+      results.add((ammout * Math.pow(1.0 + montlyTax, aux)) + ammout);
+      aux++;
+    }
+    repport(ammout, finalResult, results);
+
+    return finalResult;
+  }
+
+  public static void repport(Double initialValue, Double FinalValue, List<Double> results) {
+
+    System.out.println("Valor inicial [" + initialValue + "]" + "\nValor Final [" + FinalValue + "]"
+        + "\nTabela mes a mes");
+
+    results.forEach(result -> {
+      System.out.println("[" + result + "]");
+    });
+
+  }
+
+}

calcular-rendimento/src/test/java/com/br/DbTec/CalcularRendimento/CalcularRendimentoTest.java

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+package com.br.DbTec.CalcularRendimento;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+/**
+ * CalcularRendimentoTest
+ */
+@DisplayName("Teste do calculo de rendimento da poupança")
+public class CalcularRendimentoTest {
+
+  @DisplayName("Teste para o valor da selic acima de 8,5%. Deve usar o valor 0.5 para o calculo")
+  @Test
+  public void CalcularRendimentoComSelicMaiorQue85() {
+
+    final double entrada = 1000.00;
+    int qtdMesses = 10;
+    final float selic = 8.6f; // maior que 8.5 valor utilizaro sera 0.5
+    final float taxa = 0.12f;
+
+    final double valorEsperado = 2063.70;
+    double valorCalculado = CalcularRendimento.CalculateIncomeAmmout(entrada, qtdMesses, selic, taxa);
+
+    assertEquals(valorCalculado, valorEsperado, 0.1);
+
+  }
+
+  @DisplayName("Teste para o valor da selic abaixo de 8,5%. Deve usar o valor 0.7 para o calculo")
+  @Test
+  public void CalcularRendimentoComSelicMenorQue85() {
+
+    final double entrada = 1000.00;
+    int qtdMesses = 10;
+    final float selic = 8.4f; // maior que 8.5 valor utilizaro sera 0.7
+    final float taxa = 0.12f;
+
+    final double valorEsperado = 2085.00;
+    double valorCalculado = CalcularRendimento.CalculateIncomeAmmout(entrada, qtdMesses, selic, taxa);
+
+    assertEquals(valorCalculado, valorEsperado, 0.1);
+
+  }
+
+  @DisplayName("Teste para o valor da selic igual de 8,5%. Deve usar o valor 0.7 para o calculo")
+  @Test
+  public void CalcularRendimentoComSelicIgualA85() {
+
+    final double entrada = 1000.00;
+    int qtdMesses = 10;
+    final float selic = 8.5f; // maior que 8.5 valor utilizaro sera 0.7
+    final float taxa = 0.12f;
+
+    final double valorEsperado = 2085.01;
+    double valorCalculado = CalcularRendimento.CalculateIncomeAmmout(entrada, qtdMesses, selic, taxa);
+
+    assertEquals(valorCalculado, valorEsperado, 0.1);
+
+  }
+}