MicroLabConversion

conversion.iml

@@ -5,7 +5,6 @@
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>

src/main/java/ConversionTool.java

@@ -3,19 +3,76 @@ public class ConversionTool {
 
     public static void main(String[] args){}
 
-    public static float CentimetersToInches(float centimeters){}
 
-    public static float InchesToCentimeters(float inches){}
+    // cm to inch
 
-    public static float FeetToMeters(float feet){}
+    public static float CentimetersToInches(float centimeters){
 
-    public static float MetersToFeet(float meters){}
+        if (centimeters <= 0){ return 0; }
 
-    public static float CelsiusToFahrenheit(float celsius){}
+        return (float)(centimeters * 0.393701);
+    }
 
-    public static float FahrenheitToCelsius(float fahrenheit){}
 
-    public static float MphToKph(float mph){}
 
-    public static float KphToMph(float kph){}
+    // inch to cm
+    public static float InchesToCentimeters(float inches){
+
+        if (inches <= 0){ return 0; }
+
+        return (float)(inches * 2.54);
+    }
+
+
+    // feet to meters
+    public static float FeetToMeters(float feet){
+
+        if (feet <= 0){ return 0; }
+
+        return (float)(feet * 0.3048);
+    }
+
+
+    // meter to feet
+    public static float MetersToFeet(float meters){
+
+        if (meters <= 0){ return 0; }
+
+        return (float)(meters * 3.28084);
+    }
+
+
+    // cel to fah
+    public static float CelsiusToFahrenheit(float celsius){
+
+        return (float)(celsius * 1.8 + 32);
+
+    }
+
+
+    // fah to cel
+    public static float FahrenheitToCelsius(float fahrenheit){
+
+
+        return (float)((fahrenheit - 32) / 1.8);
+    }
+
+
+    // mph to kph
+    public static float MphToKph(float mph){
+
+        if (mph <= 0){ return 0; }
+
+        return (float)(mph * 1.60934);
+    }
+
+
+    // kph to mph
+    public static float KphToMph(float kph){
+
+        if (kph <= 0){ return 0; }
+
+        return (float)(kph * 0.621371);
+    }
+
 }

src/test/java/ConversionToolSpec.java

@@ -3,6 +3,7 @@
 
 public class ConversionToolSpec {
 
+    // centimeters to inches
     @Test
     public void shouldConvertCentimetersToInches() {
         float inches = ConversionTool.CentimetersToInches(2f);
@@ -19,6 +20,8 @@ public void shouldConvertNegativeCentimetersToZeroInches() {
         assertEquals(0, inches, 0.0);
     }
 
+
+    // inches to centimeters
     @Test
     public void shouldConvertInchesToCentimeters() {
         float centimeters = ConversionTool.InchesToCentimeters(4f);
@@ -35,6 +38,8 @@ public void shouldConvertNegativeInchesToZeroCentimeters() {
         assertEquals(0, centimeters, 0.0);
     }
 
+
+    // feet to meters
     @Test
     public void shouldConvertFeetToMeters() {
         float meters = ConversionTool.FeetToMeters(5f);
@@ -51,6 +56,8 @@ public void shouldConvertNegativeFeetToZeroMeters() {
         assertEquals(0, meters, 0.0);
     }
 
+
+    // meters to feet
     @Test
     public void shouldConvertMetersToFeet() {
         float feet = ConversionTool.MetersToFeet(9f);
@@ -67,17 +74,25 @@ public void shouldConvertNegativeMetersToZeroFeet() {
         assertEquals(0, feet, 0.0);
     }
 
-    @Test
-    public void shouldConvertFahrenheitToCelsius() {
-        float celsius = ConversionTool.FahrenheitToCelsius(80);
-        assertEquals(26.67, celsius, 0.01);
-    }
+
+
+    // celsius to fahrenheit
     @Test
     public void shouldConvertCelsiusToFahrenheit() {
         float fahrenheit = ConversionTool.CelsiusToFahrenheit(26.67f);
         assertEquals(80, fahrenheit, 0.01);
     }
 
+
+    // fahrenheit to celsius
+    @Test
+    public void shouldConvertFahrenheitToCelsius() {
+        float celsius = ConversionTool.FahrenheitToCelsius(80);
+        assertEquals(26.67, celsius, 0.01);
+    }
+
+
+    // mph to kp
     @Test
     public void shouldConvertMphToKph(){
         float kph = ConversionTool.MphToKph(24f);
@@ -94,6 +109,8 @@ public void shouldConvertNegativeMphToZeroKph(){
         assertEquals(0, kph, 0.0);
     }
 
+
+    // kph to mph
     @Test
     public void shouldConvertKphToMph(){
         float mph = ConversionTool.KphToMph(6.44f);
@@ -110,4 +127,5 @@ public void shouldConvertNegativeKphToZeroMph(){
         assertEquals(0, mph, 0.0);
     }
 
+
 }