Merge branch 'feature/currency-exchange' into feature/balance-operations

src/currencyExchange.c

@@ -0,0 +1,13 @@
+#include "currencyExchange.h"
+
+float convert(float euro, int newCurrencyCode) {
+    switch(newCurrencyCode) {
+        case CURRENCY_CODE_USD:
+            return ( euro * USD_RATE_OF_ONE_EURO );
+
+        case CURRENCY_CODE_GBP:
+            return ( euro * GBP_RATE_OF_ONE_EURO );
+    }
+    
+    return -1;
+}

src/currencyExchange.h

@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+#define USD_RATE_OF_ONE_EURO 1.07
+#define GBP_RATE_OF_ONE_EURO 0.89
+
+#define CURRENCY_CODE_USD 1
+#define CURRENCY_CODE_GBP 2
+
+float convert(float euro, int newCurrencyCode);

tests/test_currencyExchange.c

@@ -0,0 +1,48 @@
+#ifdef TEST
+
+#include "unity.h"
+#include "currencyExchange.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_convert(void) {
+
+    /* Arrange */
+
+    int length   = 10;
+    float euro[] = {34, 233, 400, 100, 45, 344, 767.32, 122, 435, 899};
+    
+    float expectedUSD[length];
+    float expectedGBP[length];
+
+    float resultUSD[length];
+    float resultGBP[length];
+
+    for (int i = 0; i < length; i++) {
+        expectedUSD[i] = euro[i] * USD_RATE_OF_ONE_EURO;
+        expectedGBP[i] = euro[i] * GBP_RATE_OF_ONE_EURO;
+    }
+
+    /* Act */
+
+    for (int i = 0; i < length; i++) {
+        resultUSD[i] = convert(euro[i], CURRENCY_CODE_USD);
+        resultGBP[i] = convert(euro[i], CURRENCY_CODE_GBP);
+    }
+
+    /* Assert*/
+
+    for (int i = 0; i < length; i++) {
+        TEST_ASSERT_EQUAL_FLOAT(expectedUSD[i], resultUSD[i]);
+        TEST_ASSERT_EQUAL_FLOAT(expectedGBP[i], resultGBP[i]);
+    }
+}
+
+
+#endif // TEST