Add chat pattern-match test coverage

chat/chat_test.go

@@ -0,0 +1,53 @@
+package chat
+
+import "testing"
+
+func TestHandlePatternMatchRecognizesKnownPricePromptsWithoutData(t *testing.T) {
+	tests := []struct {
+		name    string
+		content string
+		want    string
+	}{
+		{
+			name:    "bitcoin direct price",
+			content: "btc price",
+			want:    "I don't have current price data for Bitcoin",
+		},
+		{
+			name:    "mention is ignored",
+			content: "@micro how much is eth",
+			want:    "I don't have current price data for Ethereum",
+		},
+		{
+			name:    "case and whitespace are normalized",
+			content: "  PRICE OF GOLD  ",
+			want:    "I don't have current price data for Gold",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := handlePatternMatch(tt.content, nil); got != tt.want {
+				t.Fatalf("handlePatternMatch(%q) = %q, want %q", tt.content, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestHandlePatternMatchIgnoresUnsupportedPrompts(t *testing.T) {
+	tests := []string{
+		"",
+		"tell me about bitcoin",
+		"price",
+		"a price",
+		"this symbol is too long price",
+	}
+
+	for _, content := range tests {
+		t.Run(content, func(t *testing.T) {
+			if got := handlePatternMatch(content, nil); got != "" {
+				t.Fatalf("handlePatternMatch(%q) = %q, want empty string", content, got)
+			}
+		})
+	}
+}