feat(grow): add grow method

hamster_tycoon/hamster_test.go

@@ -39,6 +39,104 @@ func TestHamster_Die(t *testing.T) {
 	}
 }
 
+func TestHamster_Grow(t *testing.T) {
+	testCases := []struct {
+		caseName      string
+		hamster       *Hamster
+		expectedHamster *Hamster
+	}{
+		{
+			caseName: "Age increment",
+			hamster: &Hamster{
+				Age: 0,
+				Alive: true,
+			},
+			expectedHamster: &Hamster{
+				Age: 1,
+				Alive: true,
+			},
+		},
+		{
+			caseName: "Gestation decrement",
+			hamster: &Hamster{
+				Age: 0,
+				Gestation: true,
+				GestationPeriod: 1,
+				Alive: true,
+			},
+			expectedHamster: &Hamster{
+				Age: 1,
+				Gestation: true,
+				GestationPeriod: 2,
+				Alive: true,
+			},
+		},
+		{
+			caseName: "Gestation Cooldown doesn't decrement",
+			hamster: &Hamster{
+				Age: 0,
+				Gestation: true,
+				GestationCooldown: 17,
+				GestationPeriod: 1,
+				Alive: true,
+			},
+			expectedHamster: &Hamster{
+				Age: 1,
+				GestationCooldown: 17,
+				Gestation: true,
+				GestationPeriod: 2,
+				Alive: true,
+			},
+		},
+		{
+			caseName: "Gestation Cooldown decrement",
+			hamster: &Hamster{
+				Age: 0,
+				Gestation: false,
+				GestationCooldown: 17,
+				GestationPeriod: 0,
+				Alive: true,
+			},
+			expectedHamster: &Hamster{
+				Age: 1,
+				GestationCooldown: 16,
+				Gestation: false,
+				GestationPeriod: 0,
+				Alive: true,
+			},
+		},
+		{
+			caseName: "Hamster die",
+			hamster: &Hamster{
+				Age: 365*3,
+				Gestation: false,
+				GestationCooldown: 17,
+				GestationPeriod: 0,
+				Alive: true,
+			},
+			expectedHamster: &Hamster{
+				Age: 365*3,
+				Alive:false,
+				GestationCooldown: 17,
+				Gestation: false,
+				GestationPeriod: 0,
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.caseName, func(t *testing.T) {
+			if tc.hamster.Alive == !tc.expectedHamster.Alive {
+				randomizer.FakeRandomizer(364)
+			}
+			tc.hamster.Grow()
+			if !reflect.DeepEqual(tc.hamster,tc.expectedHamster) {
+				t.Errorf("Got %v expect %v", tc.hamster, tc.expectedHamster)
+			}
+		})
+	}
+}
+
 func TestHamster_Fuck(t *testing.T) {
 	testCases := []struct {
 		caseName       string
@@ -180,31 +278,6 @@ func TestHamster_Fuck(t *testing.T) {
 	}
 }
 
-func TestBorn(t *testing.T) {
-	type args struct {
-		father *Hamster
-		mother *Hamster
-	}
-	tests := []struct {
-		name    string
-		args    args
-		want    []*Hamster
-		wantErr bool
-	}{
-		// TODO: Add test cases.
-	}
-	for _, tt := range tests {
-		got, err := Born(tt.args.father, tt.args.mother)
-		if (err != nil) != tt.wantErr {
-			t.Errorf("%q. Born() error = %v, wantErr %v", tt.name, err, tt.wantErr)
-			continue
-		}
-		if !reflect.DeepEqual(got, tt.want) {
-			t.Errorf("%q. Born() = %v, want %v", tt.name, got, tt.want)
-		}
-	}
-}
-
 func Test_randSexe(t *testing.T) {
 	tests := []struct {
 		name    string