Trading: components 161-180

spread_indicator_test.go

@@ -0,0 +1,42 @@
+package mujica
+
+import (
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+)
+
+func TestSpreadIndicatorValueAndThreshold(t *testing.T) {
+	bid, ask := 99.95, 100.05
+	tt := tradingTester(GreenUp, 400, 100, func(c *ui.Context) {
+		SpreadIndicator(c, bid, ask, SpreadIndicatorOptions{WarnPercent: 0.5})
+	})
+	if !tt.HasText("0.10 (0.100%)") || tt.HasText("Wide spread") {
+		t.Fatalf("narrow: %q", tt.Texts())
+	}
+	ask = 101
+	tt.Frame()
+	if !tt.HasText("Wide spread") {
+		t.Fatalf("wide: %q", tt.Texts())
+	}
+	ask = 99
+	tt.Frame()
+	if !tt.HasText("Crossed market") {
+		t.Fatalf("crossed: %q", tt.Texts())
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("negative threshold accepted")
+		}
+	}()
+	tradingTester(GreenUp, 100, 100, func(c *ui.Context) { SpreadIndicator(c, 1, 2, SpreadIndicatorOptions{WarnPercent: -1}) })
+}
+
+func TestSpreadIndicatorSnapshot(t *testing.T) {
+	snapshot(t, "spread_indicator", 380, 100, func(c *ui.Context) {
+		ui.Column(c).Padding(20).Gap(10).Children(func() {
+			SpreadIndicator(c, 99.95, 100.05, SpreadIndicatorOptions{WarnPercent: 0.5})
+			SpreadIndicator(c, 99, 101, SpreadIndicatorOptions{WarnPercent: 0.5})
+		})
+	})
+}