Internal state persistence (#27)

Allow us to generate year over year reports without having to rerun everything from the beginning.

Co-authored-by: Natercio Moniz <[email protected]>

internal/kind_test.go

@@ -1,60 +1,95 @@
 package internal
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 func TestSide_String(t *testing.T) {
-	tests := []struct {
-		name string
-		side Kind
-		want string
-	}{
-		{"buy", KindBuy, "buy"},
-		{"sell", KindSell, "sell"},
-		{"unknown", KindUnknown, "unknown"},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := tt.side.String(); got != tt.want {
-				t.Errorf("want Side.String() to be %v but got %v", tt.want, got)
+	const unknown = "unknown"
+
+	seen := make(map[string]Kind, sentinelKind)
+	for k := Kind(1); k < sentinelKind; k++ {
+		t.Run(fmt.Sprintf("Kind %d", k), func(t *testing.T) {
+			str := k.String()
+
+			if other, ok := seen[str]; ok {
+				t.Errorf("want Kind(%d).String to be unique but was a duplicate of Kind(%d)", k, other)
+			} else {
+				seen[str] = k
+			}
+
+			if len(str) == 0 {
+				t.Errorf("want Kind(%d).String to be non-empty", k)
+			}
+
+			if str == unknown {
+				t.Errorf("want Kind(%d).String to be a known value", k)
 			}
 		})
 	}
+
+	if KindUnknown.String() != unknown {
+		t.Errorf("want Kind(0) to be unknown")
+	}
+
+	if Kind(sentinelKind).String() != unknown {
+		t.Errorf("want Kind(%d) to be unknown", sentinelKind)
+	}
 }
 
-func TestSide_IsBuy(t *testing.T) {
-	tests := []struct {
-		name string
-		side Kind
-		want bool
-	}{
-		{"buy", KindBuy, true},
-		{"sell", KindSell, false},
-		{"unknown", KindUnknown, false},
+func TestSide_Valid(t *testing.T) {
+	for k := Kind(1); k < sentinelKind; k++ {
+		if !k.Valid() {
+			t.Errorf("want %s(%d) to be valid", k, k)
+		}
 	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := tt.side.Is(KindBuy); got != tt.want {
-				t.Errorf("want Side.IsBuy() to be %v but got %v", tt.want, got)
-			}
-		})
+
+	if KindUnknown.Valid() {
+		t.Errorf("want Kind(0) to be invalid")
+	}
+
+	if Kind(sentinelKind).Valid() {
+		t.Errorf("want Kind(%d) to be invalid", sentinelKind)
 	}
 }
 
-func TestSide_IsSell(t *testing.T) {
-	tests := []struct {
-		name string
-		side Kind
-		want bool
-	}{
-		{"buy", KindBuy, false},
-		{"sell", KindSell, true},
-		{"unknown", KindUnknown, false},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := tt.side.Is(KindSell); got != tt.want {
-				t.Errorf("want Side.IsSell() to be %v but got %v", tt.want, got)
+func TestSide_Is(t *testing.T) {
+	t.Run("valid is self", func(t *testing.T) {
+		for k := Kind(1); k < sentinelKind; k++ {
+			if !k.Is(k) {
+				t.Errorf("want Kind(%d).Is(%d) to be true", k, k)
 			}
-		})
-	}
+		}
+	})
+
+	t.Run("valid is unknown", func(t *testing.T) {
+		for k := Kind(1); k < sentinelKind; k++ {
+			if k.Is(KindUnknown) {
+				t.Errorf("want Kind(%d).Is(0) to be false", k)
+			}
+
+			if k.Is(sentinelKind) {
+				t.Errorf("want Kind(%d).Is(%d) to be false", k, sentinelKind)
+			}
+
+			if k.Is(struct{}{}) {
+				t.Errorf("want Kind(%d).Is(other type) to be false", k)
+			}
+		}
+	})
+
+	t.Run("unknown is unknown", func(t *testing.T) {
+		if KindUnknown.Is(KindUnknown) {
+			t.Errorf("want Kind(0).Is(0) to be false")
+		}
+
+		if KindUnknown.Is(sentinelKind) {
+			t.Errorf("want Kind(0).Is(%d) to be false", sentinelKind)
+		}
+
+		if sentinelKind.Is(sentinelKind) {
+			t.Errorf("want Kind(%d).Is(%d) to be false", sentinelKind, sentinelKind)
+		}
+	})
 }