basic instruction properties

internal/inst/inst_test.go

@@ -0,0 +1,36 @@
+package inst
+
+import "testing"
+
+func TestHaveInstructions(t *testing.T) {
+	n := len(Instructions)
+	t.Logf("number of instructions = %d", n)
+	if n == 0 {
+		t.Fatalf("no instructions")
+	}
+}
+
+func TestOpcodeDupes(t *testing.T) {
+	count := map[string]int{}
+	for _, i := range Instructions {
+		count[i.Opcode]++
+	}
+
+	for opcode, n := range count {
+		if n > 1 {
+			t.Errorf("opcode %s appears %d times", opcode, n)
+		}
+	}
+}
+
+func TestInstructionProperties(t *testing.T) {
+	for _, i := range Instructions {
+		if len(i.Opcode) == 0 {
+			t.Errorf("empty opcode")
+		}
+		if len(i.Forms) == 0 {
+			t.Errorf("instruction %s has no forms", i.Opcode)
+		}
+	}
+
+}