1 files changed, 46 insertions, 0 deletions
diff --git a/go/game/effect_test.go b/go/game/effect_test.go
new file mode 100644
index 00000000..53058e72
--- /dev/null
+++ b/go/game/effect_test.go
@@ -0,0 +1,46 @@
+package game
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestParseXEffect(t *testing.T) {
+	e, err := parseXEffect("+1 armor")
+	if err != nil {
+		t.Fatal("unexpected", err)
+	}
+	if e.set {
+		t.Fatal("+ xEffect reports as setting")
+	}
+	if e.x != 1 {
+		t.Fatal("expected x == 1")
+	}
+
+	e, err = parseXEffect("crew 3")
+	if err != nil {
+		t.Fatal("unexpected", err)
+	}
+	if !e.set {
+		t.Fatal("xEffect reports not as setting")
+	}
+	if e.x != 3 {
+		t.Fatal("expected x == 3")
+	}
+
+	e, err = parseXEffect("foobar")
+	if err == nil || !errors.Is(err, ErrXEffectFormat) {
+		t.Fatal("expected format error")
+	}
+
+	var err2 ErrXEffectError
+	e, err = parseXEffect("9999999989899999999 armor")
+	if err == nil || !errors.As(err, &err2) {
+		t.Fatal("expected format error")
+	}
+
+	e, err = parseXEffect("crew 9999999989899999999")
+	if err == nil || !errors.As(err, &err2) {
+		t.Fatal("expected format error")
+	}
+}