Merge pull request #2 from felipeog/exercism-021

add exercism 021

practice/exercism/021-welcome-to-tech-palace/welcome_to_tech_palace.go

@@ -0,0 +1,20 @@
+package techpalace
+
+import "strings"
+
+// WelcomeMessage returns a welcome message for the customer.
+func WelcomeMessage(customer string) string {
+	return "Welcome to the Tech Palace, " + strings.ToUpper(customer)
+}
+
+// AddBorder adds a border to a welcome message.
+func AddBorder(welcomeMsg string, numStarsPerLine int) string {
+    border := strings.Repeat("*", numStarsPerLine)
+
+	return border + "\n" + welcomeMsg + "\n" + border
+}
+
+// CleanupMessage cleans up an old marketing message.
+func CleanupMessage(oldMsg string) string {
+    return strings.TrimSpace(strings.ReplaceAll(oldMsg, "*", ""))
+}

practice/exercism/021-welcome-to-tech-palace/welcome_to_tech_palace_test.go

@@ -0,0 +1,102 @@
+package techpalace
+
+import "testing"
+
+func TestWelcomeMessage(t *testing.T) {
+	tests := []struct {
+		name     string
+		customer string
+		want     string
+	}{
+		{
+			name:     "Welcome message for customer with first letter capitalized",
+			customer: "Judy",
+			want:     "Welcome to the Tech Palace, JUDY",
+		},
+		{
+			name:     "Welcome message for customer with only lowercase letters",
+			customer: "lars",
+			want:     "Welcome to the Tech Palace, LARS",
+		},
+		{
+			name:     "Welcome message for customer with dash in name",
+			customer: "Peter-James",
+			want:     "Welcome to the Tech Palace, PETER-JAMES",
+		},
+		{
+			name:     "Welcome message for customer with only uppercase letters",
+			customer: "MJ",
+			want:     "Welcome to the Tech Palace, MJ",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := WelcomeMessage(tt.customer); got != tt.want {
+				t.Errorf("WelcomeMessage(\"%s\") = \"%s\", want \"%s\"", tt.customer, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestAddBorder(t *testing.T) {
+	tests := []struct {
+		name            string
+		welcomeMessage  string
+		numStarsPerLine int
+		want            string
+	}{
+		{
+			name:            "Add border with 10 stars per line",
+			welcomeMessage:  "Welcome!",
+			numStarsPerLine: 10,
+			want:            "**********\nWelcome!\n**********",
+		},
+		{
+			name:            "Add border with 2 stars per line",
+			welcomeMessage:  "Hi",
+			numStarsPerLine: 2,
+			want:            "**\nHi\n**",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := AddBorder(tt.welcomeMessage, tt.numStarsPerLine); got != tt.want {
+				t.Errorf("AddBorder(\"%s\", %d) = \"%s\", want \"%s\"", tt.welcomeMessage, tt.numStarsPerLine, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestCleanupMessage(t *testing.T) {
+	tests := []struct {
+		name       string
+		oldMessage string
+		want       string
+	}{
+		{
+			name:       "Cleanup message with many stars and leading and trailing whitespace",
+			oldMessage: "**************************\n*    BUY NOW, SAVE 10%   *\n**************************",
+			want:       "BUY NOW, SAVE 10%",
+		},
+		{
+			name:       "Cleanup message without leading or trailing whitespace",
+			oldMessage: "**********\n*DISCOUNT*\n**********",
+			want:       "DISCOUNT",
+		},
+		{
+			name:       "Cleanup message without leading whitespace",
+			oldMessage: "*****\n SALE\n*****",
+			want:       "SALE",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := CleanupMessage(tt.oldMessage); got != tt.want {
+				t.Errorf("CleanupMessage(\"%s\") = \"%s\", want \"%s\"", tt.oldMessage, got, tt.want)
+			}
+		})
+	}
+}